June 28, 2017 - New Accepted Materials; RoofStar Guarantee Standards revisions including: eave protection and underlayment; air/vapour barriers; mineral wool insulation standards

New Accepted Materials

FT Synthetics

  • HT-SA self-adhering underlayment (for eave and valley protection (asphalt shingles)

Hydrotech Membrane Corporation

  • Monolithic Membrane 6125
  • Monolithic Membrane 6125 EV

Accepted for:

  • Protected Membrane Roof Assemblies, and for
  • Waterproofing assemblies.

Soprema Inc.

  • Alsan RS 230 (system with various components)

Accepted for both the primary field and detail membranes as part of:

  • Conventionally insulated and Protected/Modified Protected Roof Assemblies, and as part of
  • Waterproofing assemblies

Acceptable application of this system is limited to:

  • direct application to concrete decks, provided the epoxy primer is used for new concrete application, or
  • application as the “cap” ply over an acceptable base ply in conventional SBS roof assemblies (PARS and AARS assemblies must have an adhered cover board)

IKO Industries Ltd.

  • IKO Stormtite (accepted as a synthetic underlayment only, for asphalt shingles)

New/Revised Guarantee Standards

Red and Bold Red italics in this bulletin indicate changes made to the RoofStar Guarantee Standards wording.  Refer to the published RoofStar Guarantee Program Standards.

7.2.2 Mineral Wool Insulation
Mineral wool insulation panels must be fastened or adhered according to the manufacturer’s published instructions and tested assemblies, but in any event must conform to the options shown in the table below.

           Permissible Conventional Roof Assembly – Mineral Wool Insulation

A Non-Coated Mineral Wool Base Insulation layer is permissible only by mechanically fastening, but may not have additional insulation layers adhered to it.

†† NOTE: All conventional roof systems with an overburden (see 10.1.1 & 10.1.2) require a ½” cover board over the top layer of insulation, regardless of its type. Adhere cover board only if top insulation layer is bitumen-coated.


1.2.3 Eave Protection and Underlay
.1 Acceptable eave protection consists of one continuous width of accepted self-adhesive rubberized asphalt sheet.

Apply on the roof deck, extending from the edge of the roof a minimum distance of 915 mm (3′) up the roof slope to a line not less than 300 mm (12″) inside the inner face of the exterior wall. In high snow regions, extend the eave protection not less than 600 mm (24”) inside the inner face of the exterior wall. Eaves protection membrane is to be carried up all abutments (walls, skylights, etc.) a minimum of 125mm (5″).

Eave protection is not required:

  1. over unheated garages, carports, and porches, or
  2. where the roof overhang exceeds 915 mm (3′) measured along the roof slope from the edge of the roof to the inner face of the exterior wall.

Horizontal runs of eave protection must be positively lapped at least 50 mm (2″) and end laps (vertical joints) must be at least 150 mm (6″). Where negative (backward) laps are unavoidable, laps must be at least 150 mm (6”), and seams must be roller-pressed and sealed with a compatible mastic along the seam edge

.2 Acceptable underlay may include any of the following:

  • At least one ply of 15 lb. non-perforated asphalt saturated felt
  • RoofStar-accepted synthetic underlayment
  • RoofStar-accepted self-adhering eave protection

Because synthetic and fully-adhered membranes vary in vapour permeability, consult the manufacturer’s specifications and ventilation requirements of the British Columbia Building Code (latest edition).

For materials acceptable under the RoofStar Guarantee Program, see Eave Protection & Underlayment.

Apply underlayment to all roof decks in shingle fashion, fastened in accordance with the manufacturer’s published instructions and acceptable fasteners.

Horizontal runs of underlayment must be positively lapped at least 50 mm (2″) and end laps (vertical joints) must be at least 150 mm (6″). Where negative (backward) laps are unavoidable, only a RoofStar-accepted self-adhering underlayment may be used. Negative laps must be at least 150 mm (6”), and seams must be roller-pressed and sealed with a compatible mastic along the seam edge.

Underlayment is to be carried up all abutments (walls, skylights, etc.) a minimum of 125mm (5″).

Felt underlays and asphalt shingles must be applied on the same day. To prevent wrinkling, let felt relax before installing.


Air and Vapour Barriers – All Systems

NOTE: See more information on Vapour Retarders in Section B: Essential Elements.

6.1 Intent

Air and vapour barriers, along with thermal barriers, water resistive barriers and water-shedding surfaces, serve to separate the outside environment from the interior environments of a structure.  Continuous air barriers are perhaps the most critical.  Building Codes in force in each jurisdiction, and the National Energy Code (2011), require the selection and proper installation of “a continuous air barrier system comprised of air-barrier assemblies to control air leakage into and out of the conditioned space” (NEC 2011).

Continuity of the air and/or vapour barrier from the wall systems and roof systems is essential to the satisfactory performance of either or both.  Therefore, proper connection between air and/or vapour barrier systems is essential, and the responsibility of both the design authority and trades constructing walls and roofs.

Air barriers control “flow of air through the building enclosure, either inward or outward” (Guide for Designing Energy Efficient Building Enclosures, Homeowner Protection Office).  Controlling air flow into and out of conditioned spaces affects the performance of “thermally efficient enclosure assemblies” (ibid), impacts the potential for condensation in between materials, and directly influences rain water penetration of the building envelope.  Some air barriers are considered permeable, others air-impermeable or ‘airtight’.  The suitability of one over the other, in the application of a roofing system, is left to the discernment of the design authority and/or the roofing contractor.  Consequently, the RoofStar Guarantee Program strongly recommends that designers and builders of roof systems intended to qualify for a RoofStar Guarantee carefully consider the regulatory design and installation requirements for effective, continuous air barrier systems.

Vapour barriers regulate or prohibit the movement of water vapour from one space to another by means of diffusion.  Consequently, these barriers are referred to as either vapour-permeable or impermeable.  Diffusion is a slow process, in contrast to air movement, and its regulation is not always mandatory or even desirable.  Consequently, because continuous vapour barriers “are not needed within all climate zones and assemblies”, they are considered non-critical and may be left to the discretion of the design authority.  Nevertheless, where continuous vapour barriers are required and specified by provincial or municipal building codes (current and in force), the RoofStar Guarantee Program requires that a suitable vapour barrier system be selected by the design authority and properly installed by the roofing contractor in conformity with the vapour barrier manufacturer’s published instructions, and with the design authority’s specified details.

Any references in this Manual to installation methodologies, and any construction details that show air and/or vapour barriers, are merely illustrative and not prescriptive.  Installers of continuous air and/or vapour barrier systems are urged to understand and comply with best practices for their application.

6.2 Limitations and Exclusions

.1 Air and vapour barrier performance is not part of the RoofStar Guarantee, and air/vapour barrier materials are not listed in the Accepted Materials section of this Manual.  Therefore, the decision to specify an air and/or vapour barrier, the placement of a continuous air and/or vapour barrier in relation to a roof assembly and system, and the selection of suitable materials for that application, is the sole responsibility of the design authority.  The design authority is urged to review and consider the performance characteristics of materials available for such applications.

Neither the RoofStar Guarantee Program nor the roofing contractor will accept any responsibility for damage to, or failure of, the roof system caused by the use or absence of air and/or vapour barriers.

.2 Proper installation and continuity of air and/or vapour barriers within the roof assembly is the responsibility of the roofing contractor. The air/vapour barrier must:

  • Extend past the roof membrane flashing by 100mm (4”) on new construction providing a positive (water-shedding) lap seal union between courses of material for the wall air/vapour barrier membrane applicator.
  • Must be sealed to the wall air/vapour barrier on roof replacement projects.

Installation must conform to the manufacturer’s published requirements and the design authority’s design details.

6.2 Material Selection

.1 Fully supported air and/or vapour barriers must possess a minimum published static puncture resistance rating of 150 N (34 lbf) (ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied.  For unsupported air and/or vapour barriers, see 6.2.3 below. Therefore, while responsibility for the selection of a suitable air/vapour barrier rests with the design authority, a roof designed and built to qualify for a RoofStar Guarantee shall not include either polyethylene sheet plastic or bitumen-impregnated kraft paper.

.2 Where air and/or vapour barriers are specified by the design authority, they must be selected from the materials listed in the wind-tested assemblies reports for MARS, PARS or AARS roof systems (excluding polyethylene sheet plastic and kraft paper, as noted above).  For a complete listing of current wind test reports, click on the linked system acronyms above.

.3 Notwithstanding any of the foregoing, the RoofStar Guarantee Program strongly recommends that any air and/or vapour barrier system be installed over a smooth, continuous plane (for example, concrete or plywood).  Consequently, a deck overlay board installed on corrugated steel roof decks in highly recommended.  Where no deck overlay board is installed and the air and/or vapour barrier is partially unsupported (for example, on a steel deck), the air and/or vapour barrier must have a published static puncture resistance of at least 400 N (90 lbf).  Furthermore, both the side laps and end laps must be fully supported.

.4 Should the air/vapour barrier membrane be used as a temporary roof during project construction by either the roofing contractor or by other trades, a minimum 2mm thick bituminous membrane is recommended.

.5 Because curing concrete releases considerable moisture that can compromise the performance of a roof system, a vapour barrier installed on new concrete decks (28 days or older) must be selected to prevent condensation inside the roof system.  A membrane with a permeability of 0.01 perms (Class I) is recommended.  Nevertheless, the selection of the vapour barrier product is the responsibility of the design authority.

6.3 Vapour Retarder Design for High-Humidity Building Interiors

Careful consideration should be given to the performance characteristics of air and/or vapour barriers when specifying such a membrane for roof assemblies constructed over high-humidity building interiors.  These types of building interiors include (but are not limited to)

  • Swimming pools
  • Commercial laundry facilities
  • Large aquariums
  • Paper mills

Roof systems for facilities such as these, with high-humidity environments, may be susceptible to the accumulation of moisture within the roof assembly unless an effective vapour barrier is omitted.

Vapour retarders for high humidity facilities should have a perm rating as close to zero as possible, be durable, multi-layer membranes that are effective in preventing vapour drive into the roof systems from the interior of high humidity environments.

Thin, lightweight, single-layer vapour retarders are prone to damage during installation of roof assemblies and are therefore not recommended for use over high humidity building interiors.


Revised ASM (Architectural Sheet Metal) Standards

Comprehensive changes to the ASM Guarantee Standards have been approved and are forthcoming, subject to the completion of new detail drawings.  A separate Technical Update will be issued once the new section material is ready for publishing.

January 25, 2017 - New Accepted Materials (including ASM); RoofStar Guarantee Standards revisions including: leak detection, overburdens, roof drains, insulation adhesion

New Accepted Materials

FT Synthetics

  • Platinum HT-SA (for shingle underlayment only)

Nielson Roofing & Sheet Metal Ltd.

  • SS 100 ASM panel profile
  • FF100 ASM panel profile

New/Revised Guarantee Standards

Red and Bold Red italics in this bulletin indicate changes made to the RoofStar Guarantee Standards wording.  Refer to the published RoofStar Guarantee Program Standards.


DOW Chemical Ballast Guide for PMR and MPMR Assemblies
For reference only – see Protected and Modified Protected Roof Systems in B. Essential Elements, and in each of the low slope membrane roof system sections.


8.4.2 Adhering (NOTE: for SBS, EPDM, TPO/PVC and BUR Roof System Standards.  For colour-coded classification of the wording, refer to the RoofStar Roofing Practices Manual)

When asphaltic membranes are adhered (using hot asphalt, cold adhesives, or when applied with a torch), at least one layer of overlay board is required over all types of insulation. The exception to this requirement is mineral wool insulation used in a single or multi-layered adhered or partially adhered insulation assembly, where the top surface of the uppermost insulation layer incorporates an impregnated bitumen surface to which an asphaltic membrane may be torch welded, mop-applied or cold-adhered.

Note the following restrictions and conditions, which apply to the above:

  • flame protection may be required where only one layer of insulation is specified.
  • where mineral wool insulation is mechanically fastened through the uppermost insulation layer, an adhered non-flammable cover board with a thickness of no less than 12.5 mm (1/2”) is mandatory, to prevent fastener penetration of the adhered membrane. A cover board is not required where only the bottom layer of a multi-layer mineral wool insulation assembly is mechanically fastened.

The following standards, principles and information also apply:

Heat Sensitive Insulation: On all heat sensitive insulation (polystyrene – both  extruded and expanded), an overlay consisting of two layers of acceptable cover board (each with min. 3/16″ thickness) is to be used when using hot-applied adhesive, when torch-welding or where the cover board is less than 1/2″ in thickness on torch applied assemblies. Overlay board thickness shall not exceed 50 mm (2”).  Fibreboard shall not be used with flame-welded membrane seams.


9.3.4 Cold-Applied and Self-Adhered Membranes (NOTE: for SBS; see also 9.3.6 in BUR Roof System Standards.  For colour-coded classification of the wording, refer to the RoofStar Roofing Practices Manual)

When the base sheet and cap sheet membrane assemblies are self-adhered or applied using a cold adhesive, the cap sheet membrane must be installed on a clean, dry base.  Therefore, barring extreme circumstances, and to comply with the manufacturer’s requirements, the base and cap sheets must be installed and completed together on the same work day. This standard does not apply where torch-applied cap membranes will be bonded to a self-adhering base membrane.  Specifications and manufacturers’ written application instructions must be strictly followed. Phased installation of membranes is not permitted.


NOTE to Reader: What follows is a substantial change to the RoofStar Guarantee Standards for Waterproofing.  Most of the material shown here is new (hence the red text).  Note that the section title has changed.

10 VEGETATED ROOF ASSEMBLIES, PLANTERS & OCCUPIED SPACES (NOTE: for SBS, EPDM, TPO/PVC and BUR Roof System Standards.  For colour-coded classification of the wording, refer to the RoofStar Roofing Practices Manual)

10.1 General

SBS Modified Bituminous membranes used on Landscaped and Vegetated conventionally insulated roofing systems with an overburden 200 mm (8”) or less in depth shall consist of two plies and the top ply (cap) must be a minimum thickness of 3.7 mm on the selvedge edge, with a minimum 180g / meters squared polyester or equal strength combination reinforcement. Thermoset and Thermo Plastic (EPDM, TPO, PVC) single ply membranes used for Landscaped and Vegetated roofing systems shall be fully adhered and a minimum thickness of 1.5mm (0.060″).

For roof membrane systems insulated above the membrane (Protected Membrane Roof assemblies), refer to the membrane standards under Protected and Modified Protected Membranes and additional requirements set out below in 10.1.2.

10.1.1 Definitions

Overburden

In this Manual, “overburden” denotes any manner of material, equipment or installation that is situated on top of, and covering all or a portion of, a roof or waterproofing membrane assembly.  This excludes thermal insulation but includes and is not limited to

  • planters, inclusive of everything they contain;
  • vegetated assemblies in trays, mats or other similar containers;
  • loose growing media, gravel, sand or any other granular material;
  • non-structural water features, inclusive of the water;
  • void fill;
  • tiles, pavers, supporting pedestals or other similar materials;
  • equipment and/or installations, other than those mounted on curbs or structural mounts which are permanently waterproofed with the roof membrane assembly

Extensive Vegetated Roof Assemblies

Roof top gardens having minimal plant species diversity, irrigated only to establish plants, and typically having a soil depth of less than 150 mm or 6 inches.

Intensive Vegetated Roof Assemblies

Roof top gardens with diverse plant species, irrigated for maintenance and typically having a soil depth equal to or more than 150 mm or 6 inches.

10.1.2 Design and Construction Requirements

Roof Systems – Options and Requirements

A conventional roof membrane assembly is not appropriate for all types of roofs supporting overburden.  For example, overburden weight, and hydrostatic pressure exerted because of certain types of overburden, demand different materials and design approaches to ensure membranes do not fail.  Therefore, where

  • the designed overburden of the roof assembly (excluding plants) exceeds 150 mm (6”) in depth, or
  • the point-loading of overburden equals or exceeds 138 kPa (20 psi); or
  • moveable planters or equipment/installations on a roof each weigh 90 Kg (200 lbs) or more

the roof must be designed and constructed to comply with all the requirements for a Protected Membrane Roof assembly (insulated above the membrane); under these circumstances, conventionally insulated roof assemblies (insulated beneath the membrane) are not permitted under the RoofStar Guarantee Program.  Furthermore, both a Moisture Survey Scan of the installed membrane assembly and a permanently installed electric leak detection system are mandatory (for leak detection system requirements, refer to the RoofStar Guarantee Standards for Waterproofing Plazas, Promenades and Terraces).  EPDM roof membranes are therefore excluded from these applications.

The cost of removal and re-installation or replacement of any such equipment, installations, planters, overburden (or services and connections associated with them) is the sole responsibility of the building owner, whether for the purpose of investigating a leak or conducting warrantable repairs to the membrane.

For further requirements concerning leak detection for Rooftop Gardens, Vegetated Roof Assemblies and Planters, see 10.7 Membrane Moisture Surveys and Electric Leak Detection.

10.2 Membrane Protection…

10.3 Planter Design & Waterproofing…

10.4 CSA A123.24 and Wind Uplift…

10.5 Overburdens

10.5.1 Extensive Vegetated Roof Assemblies

Where Extensive Vegetated Roof Assemblies are installed as part of the roofing specification and / or contract, the costs for removal and replacement of soil to access the membrane, to investigate or repair leaks in the membrane, are included in the RoofStar Guarantee coverage. However, the removal and replacement of plants, irrigation lines and or equipment, electrical lines, landscape and decorative features such as concrete pads, statues, planters, large rocks, etc., to investigate or repair leaks in the membrane, is not included, and is the responsibility of others. Consequently, such access shall be provided and/or paid for by others.

10.5.2 Intensive Vegetative Roof Assemblies

Intensive Vegetated Roof Assemblies installed as part of the roofing specification and/or contract, are permitted on conventionally insulated membrane roof assemblies provided the depth of the growing medium does not exceed 150 mm (6″);

When an Intensive Vegetated Roof Assemblies with growing medium greater than 150 mm (6”) forms part of the roofing specification and/or contract, the roof must be designed and constructed to the RoofStar Guarantee Standards for a Protected Membrane Roof assembly (see 10.1.2 above).  Consequently, the removal and replacement of such overburden is the responsibility of the others, and such costs do not form part of the coverage under a RoofStar Guarantee.

10.5.3 Planters

10.6 Walkways and Warning Zones

10.7 Membrane Moisture Surveys and Electric Leak Detection.

10.7.1 General

A Membrane Moisture Survey and permanently installed electric leak detection system is mandatory for all roofs that must be designed and installed to meet the requirements for a RoofStar Guaranteed Protected Membrane Roof assembly.

10.7.2 Flood Testing

Flood Testing is not a recommended practice but is at the discretion of the design authority or owner. If flood testing is required to water test waterproofing membranes, testing shall be conducted prior to installation of insulation and overburdens and be performed to ASTM D5957 – 98.

10.7.3 Application

10.7.3.1 Moisture Scan Survey

Membrane moisture survey scans must be performed on all waterproofing membrane systems by an independent Moisture Detection Company that is specifically accepted by the RoofStar Guarantee Program.

10.7.3.2 Leak Detection Systems

Only electric leak detection systems (utilizing high or low voltage) accepted for use in the RoofStar Guarantee Program may be installed and monitored on waterproofing systems accepted by the RoofStar Guarantee Program.

A Membrane Moisture Survey and an installed electric leak detection system is not required on PMR or MPMR roof systems when the roof system is designed and constructed with

  • overburden not exceeding 150 mm (6”) in depth, or
  • moveable planters or equipment/installations on a roof each weighing less than 90 Kg (200 lbs); or
  • standard concrete pavers on pedestals

Regardless of the accepted leak detection technology employed, the leak detection system must provide detection capabilities for the entire affected deck surface and extend leak detection a minimum of 50 mm (2″) vertically from the water plane at

  • all transitions;
  • any point along the entire deck perimeter; and at
  • protrusions

Where the electric leak detection system of choice utilizes a sensor ribbon installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no less than two (2) metres in any direction for waterproofing systems covered by the Overburden.

10.7.4 Leak Detection for Sensitive Occupied Spaces

Designers are strongly encouraged to consider specifying an insulated (PM) membrane system and mandatory leak detection protection for a RoofStar Guarantee when the occupied space below a roof area contains, or will contain,

  • highly sensitive equipment or contents (e.g. hospitals, art galleries), or
  • electronic systems (e.g. communications or data centres)

Criteria for evaluating the sensitivity of building interiors is left to the Design Authority.


NOTE to Reader: What follows is a substantial change to the RoofStar Guarantee Standards for Waterproofing Plazas, Promenades and Terraces.  Only new material is shown in red text; all else has been reorganized, rendering the format completely new.

12 WEARING COURSE and OVERBURDEN (NOTE: for Waterproofing Guarantee Standards only.  For colour-coded classification of the wording, refer to the RoofStar Roofing Practices Manual)

12.1 General

In this Manual, a “wearing course” or “overburden” is used to denote any manner of material, equipment or installation that is situated on top of, and covering all or a portion of, a waterproofing membrane assembly.

Wearing courses or overburdens for plaza deck waterproofing systems are classified either as accessible or inaccessible. Waterproofing Systems for pedestrian and emergency vehicle traffic on plaza decks are often designed with inaccessible wearing courses or overburdens. In contrast, Protected Membrane Roofing Systems on plaza/terrace decks are almost always designed with accessible wearing courses for pedestrian traffic and utilize pavers on pedestals.

Accessible wearing courses and overburdens are reasonably easy to remove for access to the membrane. Inaccessible wearing courses or overburdens require demolition or substantial material removal to gain access to the membrane, and are often constructed with cast-in-place concrete protection slabs (split-slab) or brick, tile or stone set in mortar beds.

Inaccessible Overburdens may also include soils (and associated plants), vegetative assemblies in a growing medium greater in depth than 150 mm (6”), and water features or equipment installations (non-structural but not easily moved).  As a result of the potentially high cost of demolition to access membranes under Inaccessible wearing courses or overburdens, the performance criteria for these waterproofing systems are higher. To qualify for coverage under the RoofStar Guarantee Program, an electric membrane leak detection system is required in order to identify and locate membrane breaches that may occur during the waterproofing system’s service life.

The RoofStar Guarantee Program strongly recommends the use of wearing surfaces that permit relatively easy access to the membrane. Waterproofing systems that incorporate in the design either Accessible Wearing Courses of a more complex nature, or Inaccessible Wearing Courses, such as poured-in-place concrete, asphalt paving and wearing surfaces units set in mortar beds, etc. must meet additional standard requirements for coverage under the RoofStar Guarantee Program.

12.2 Installation

12.2.1 Accessible Wearing Courses

An Accessible Wearing Course is limited to a maximum of 200 mm (8”) in depth.  Accessible Wearing Courses can be comprised of various materials, subject to some limitations.

Concrete pavers on pedestals permit easy access to waterproofing membranes and therefore are the best choice (whenever practicable) for an Accessible Wearing Course over all waterproofing systems. When pavers are used as the walkway material, they must be spaced no closer than 3mm (1/8″) and must be supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.5 mm (1/2″) of vertical separation layer for airflow and levelling. The choice of pedestal or drainage layer type is the responsibility of the design authority. Pedestals provide airflow for drying surfaces and assist in leveling. They should not impede the flow of water or air, and should uniformly distribute the dead load of pavers and predicted live loads.

An Accessible Wearing Course may include installed unit masonry, brick, tile or stone (placed on sand and or gravel beds), and both Extensive and Intensive Vegetated Assemblies.  That said, some of these types of wearing courses are more difficult to remove than pavers on pedestals.  Consequently, an installed electric leak detection system may be mandatory. For further information and the RoofStar Guarantee Standards applicable to leak detection systems, see 13.3.2 below.

In the event the waterproof membrane requires repairs or maintenance, Accessible Wearing Courses will be removed and reinstalled under the terms and conditions of the RoofStar Guarantee.  Replacement of any components that cannot be reinstalled, due to breakage or other factors, remains the responsibility of the Owner.

12.2.2 Inaccessible Wearing Courses

Wearing Courses greater than 200 mm (8”) in depth, regardless of their composition, are considered Inaccessible. Typically, an Inaccessible Wearing Course is one designed for pedestrian and emergency vehicle traffic on plaza decks, and includes cast-in place concrete protection slabs (split-slab) and brick, tile or stone set in mortar beds.  Because Inaccessible Wearing Course designs require demolition for access to the membrane, an installed electric leak detection system is mandatory. Electric leak detection systems that are specifically accepted by the RoofStar Guarantee Program are listed in the Accepted Materials: Leak Detection & Monitoring Systems section of this Manual.

Solid cast-in place concrete protection slab (split-slab) and asphalt paving wearing courses shall incorporate surface score lines (indents) to facilitate cutting for removal of wearing course sections in order to locate possible breaches in membranes. Score lines shall be straight edged grid patterns (squares, rectangles, diamonds, etc.) with indents spaced at a maximum of two (2) metres apart.

Because of their nature, the removal and reinstallation or replacement of Inaccessible Wearing Courses is not covered under the terms and conditions of a RoofStar Guarantee.

13 MEMBRANE MOISTURE SURVEYS & ELECTRIC LEAK DETECTION

13.1 General

A membrane moisture survey (see 13.3.1) is required for all waterproofing membrane systems, prior to the installation of any overburden or wearing course.

When mandated in this Manual, an electric leak detection system (13.3.2) shall be installed on the waterproofing membrane, or placed over protection boards or SBS membranes that have been set in hot fluid-applied modified asphalt, prior to the application of overburdens or wearing courses.  The leak detection system may be constantly monitored, but ongoing monitoring is not a requirement of the RoofStar Guarantee Program.

13.2 Flood Testing

Flood Testing is not a recommended practice but is at the discretion of the design authority or owner. If flood testing is required to water test waterproofing membranes, testing shall be conducted prior to installation of insulation and overburdens and be performed to ASTM D5957 – 98.

13.3 Application

13.3.1 Moisture Scan Survey

Membrane moisture survey scans must be performed on all waterproofing membrane systems by an independent Moisture Detection Company that is specifically accepted by the RoofStar Guarantee Program.

13.3.2 Leak Detection Systems

Only electric leak detection systems (utilizing high or low voltage) accepted for use in the RoofStar Guarantee Program may be installed and monitored on waterproofing systems designed and accepted by the RoofStar Guarantee Program.

The following types of wearing courses do not require installation of an electric leak detection system:

  • pavers on pedestals
  • gravel ballast with a maximum depth of 100mm (4″)
  • an Extensive Vegetative Waterproofing Assembly, or
  • an Intensive Vegetative Waterproofing Assembly with a soil depth of less than 200 mm (8”)

An installed electric leak detection system is mandatory on waterproofing systems covered by Accessible Wearing Course that includes

  • unit masonry, brick, tile or stone (placed on sand and or gravel beds), or
  • an Intensive Vegetated Waterproofing Assembly with a soil depth equal to or more than 200 mm (8”),
  • water features or equipment installations (non-structural but not easily moved).

An installed electric leak detection system is also mandatory on all waterproofing systems covered with Inaccessible Wearing Courses.

Regardless of the accepted leak detection technology employed, the leak detection system must provide detection capabilities for the entire deck surface and extend leak detection a minimum of 50 mm (2″) vertically from the water plane at

  • all transitions;
  • any point along the entire deck perimeter; and at
  • protrusions.

Where the electric leak detection system of choice utilizes a sensor ribbon installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no less than three (3) metres in any direction for waterproofing systems covered by an Accessible Wearing Course, and no less than two (2) metres in any direction for waterproofing systems covered by an Inaccessible Wearing Course.


12.5 Roof Drains (NOTE: for SBS, EPDM, TPO/PVC and BUR Roof System Standards.  For colour-coded classification of the wording, refer to the RoofStar Roofing Practices Manual)

A roof drain, in this Manual, means “a fitting or device that is installed in the roof to permit storm water to discharge into a leader.” (BCPC, Division A, Part 1).  A leader “means a pipe that is installed to carry storm water from a roof to a storm building drain or sewer or other place of disposal” (BCPC, Division A, Part 1).  An overflow is a secondary roof drain that serves as a safeguard when roof drains fail.

Roof drains are comprised mainly of two parts: a bowl or flange that is affixed to the roof deck with mechanical fasteners or a proprietary clamping mechanism; and an integral drain stem that connects the bowl or flange to the leader.  Roof drains are sized according to the diameter of the drain stem.  The appropriate size and number of roof drains for any given roof area is determined by the relevant municipal and/or provincial building code in force (ref. BCPC, Division B – Part 2; 2.4.10.4 Hydraulic Loads from Roofs or Paved Surfaces).

Roof drains can be further classified as internal or external.  Internal roof drains are connected to leaders located and connected to a storm building drain or sewer inside the exterior surface of a building.  External roof drains drain storm water outside the exterior surface of a building.  External roof drains may connect to leaders.  Any requirements for leaders and connections to leaders may be found in the applicable municipal and provincial building and plumbing codes (ref. BCBC, 5.6.2.2 Accumulation and Disposal).

Roof drains and other roof accessories are to be installed as per membrane manufacturer’s instructions.

12.5.1 Internal Roof Drains

All drains shall be connected to internal leaders only with mechanical compression type seals. “O”- rings, mastics and caulking are not acceptable methods for sealing internal roof drains to leaders.

12.5.1.1 Cast-iron Roof Drains

All cast-iron roof drains must be flashed …

When cast-iron roof drains…. proprietary secondary stainless steel debris strainers is acceptable.

12.5.1.2 Flange-type Roof Drains

Flange-type drains typically include

  • Bowl-style drains with an extended flange, and
  • flat drains without a bowl

Drains for use in the RoofStar Guarantee Program must be hot-welded at the joints between the bowl/flange and drain stem.

All flange type roof drains shall be constructed of non-ferrous material and include a primary drain strainer. Flanged copper drains shall be formed from a minimum weight of 16 oz. sheet copper for external (on outside of walls) drains and 24 oz. sheet copper for internal (inside walls or buildings) drains. The minimum gauge for aluminium sheet to be used for roof drains shall be 20 gauge for external use and 12 gauge for internal use.

On all roofing systems that utilize gravel ballast and or growing mediums (soil), the trade supplying roof drains must also provide secondary stainless steel debris strainers. Only the use of drain manufacturer’s proprietary secondary stainless steel debris strainers is acceptable.

12.5.2 External Roof Drains

12.5.2.1 Scupper Drains

A scupper drain may serve either as a primary roof drain or as a secondary drain.  A scupper drain passes through a wall or parapet, and is connected to a drain leader outside the building envelope.  Scupper drains must incorporate a continuous flange surrounding the drain box, measuring at least 100 mm (4”) in width, and must be manufactured with welded seams and joints, and made from non-ferrous metals, subject to the Material Selection standards for metal found in this Manual.

All scupper drains shall be formed with a minimum 37.7 mm (1 ½”) lower outside faces than side walls of the water collection boxes and incorporate minimum 12.7 mm (½”) drip edges on the lowered outside faces.

Scupper drains shall be installed according to the prevailing municipal building code and the British Columbia Building Code (latest edition).

12.5.3 Overflows

An overflow is only a secondary drain that serves as a safeguard when primary drains fail.  Overflows must incorporate a continuous flange surrounding the drain box, measuring at least 100 mm (4”) in width, and may be manufactured from ferrous metals, subject to the Material Selection [hyperlink] standards for metal found in this Manual.

Heights and locations of roof drains are the responsibility of the Design Authority.  The RoofStar Guarantee Program recommends the installation of overflows

  • when the perimeter wall height above the roof membrane exceeds 100 mm (4”)
  • no higher than 100 mm (4”) above drain elevations
  • in locations where their discharge of storm water will be visible.

Overflows are required when low doorway or low window details are used (see D1.7.31 Water & Drainage (Open Wall Scupper) and D1.7.32 Water & Drainage (Through-wall Scupper)).  In these applications, the overflow must be installed at least 1” lower than the elevation of the door or window sill.

Overflows shall be installed according to the prevailing municipal building code and the British Columbia Building Code (latest edition).

Where no overflows are specified, the building structure must be designed to carry the total load of water collected on the roof, in the event of the failure of roof drains (see BC Building Code, latest edition). The RoofStar Guarantee Program accepts no responsibility for roof failure where overflows are not specified or installed.


TPO, PVC Guide Specifications
3.6 Mechanically Fastened Membrane:

3.6.1 ENGINEERED SYSTEM

.1 Unroll membrane and draw tight to minimize wrinkles and folds; lap adjacent sheets (50) mm (2″) to fabricate hand-welded seams, and lap adjacent sheets (100) mm (4″) to fabricate 38mm (1.5″) machine-welded seams.

.2 Heat-weld seams according to Membrane manufacturers’ printed instructions.

.3 Place proprietary fastening bars over membrane and fasten through pre-drilled holes; bar and fastener placement to be determined by membrane manufacturer.

.4 Weld a membrane cover strip over each bar.

.5 Install continuous fastening bar at the base of perimeter and vertical flashings.

.6 Complete perimeter flashing details according to membrane manufacturer’s details and specifications.


For Section Headers (Applicable to Low Slope and Steep Slope Roofs main section pages)

A Roof System (different from a roof assembly) excludes the structural roof deck but includes the roof covering and any other components, including insulation.

September 28, 2016 - New Accepted Materials; RoofStar Guaranteee Standards revisions including: insulation fasteners, metal roof panels, cap flashing attachment, definitions

New Accepted Materials

CertainTeed

  • Northgate SBS laminate shingle

New/Revised Guarantee Standards

Red and Bold Red italics in this bulletin indicate changes made to the RoofStar Guarantee Standards wording.  Refer to the published RoofStar Guarantee Program Standards.


A4.4 Insulation Fasteners
.1 The roof area is divided into three areas (zones). The perimeter area is defined as 10% of the building
width or 40% of the building height, whichever is less. In no case will perimeter area be less than 2.0 m
(7′). The field area is defined as the remaining area after the perimeter is calculated. When the roof height
is:
• greater than 18 m (60’) and low-slope (slope is 2:12 or less) or
• less than 18 m (60’) and pitched (slope is greater than 2:12
Perimeter fastening along the entire eave will be enhanced to corner requirements. The corner area is
defined by the perimeter in both directions at the corners. In no case will the corner area be less than 2.0
m x 2.0 m (7’ x7’). For corner enhancement of roofs in high wind locations (higher than 100 mph) or for
roofs above 60’ refer to Section 3.8.5.

Note: Refer to part 4 of the applicable code to ensure compliance.

Wind Uplift Design and CSA A123.21

Qualifying for a RoofStar Guarantee
To qualify for a RoofStar Guarantee, and to comply with the Guarantee Standards in this Manual,
mechanically attached and adhered insulated membrane systems must be secured to the roof deck in
keeping with the requirements set out below.

Definitions
Membrane Roof System
– “Consists of a deck and roofing membrane. It includes components such as
vapour barriers or retarders, insulation, cover board, etc. It is subjected to a dynamic load sequence that
has been developed based on wind pressure records, simulating the effects of wind on membrane-roof
assemblies” (CSA A123.21, Scope 1.1)
CSA Standard
– CSA Standard A123.21 Standard test method for the dynamic wind uplift resistance of
membrane-roofing systems (latest edition)
Accepted Membrane Roof System Assembly
– an assembly of Accepted Materials that meets or exceeds
the Standard
Mechanically Attached Roof Systems (MARS)
– A “system in which the roofing membrane is intermittently
attached to the deck using fasteners…” (CSA A123.21, Definitions)
Adhesive Applied Roof Systems (AARS)
– A “system in which the roof membrane is bonded to the
substrate using adhesives and all other components below roofing membrane are adhered using
adhesives…” This includes “a system in which the roof membrane is bonded to the substrate using
adhesives” (CSA A123.21, Definitions)
Partially Attached (Hybrid) Roof Systems (PARS)
– A “system in which the roof membrane is bonded to
the substrate using adhesives and a minimum of one component below the membrane is intermittently
attached to the supporting structure using fasteners…” This includes “a system in which the roof
membrane is bonded to the substrate using adhesives” (CSA A123.21, Definitions)

New Membrane Roof Systems
To qualify for a RoofStar Guarantee, and to comply with the Guarantee Standards set out herein, all new
Membrane Roof Systems that begin with an exposed deck (MARS, PARS and AARS) must be designed
and built to meet or exceed the test requirements of the CSA Standard. Only those Membrane Roof
Systems that have successfully met the CSA Standard through tests administered by a qualified test
facility/laboratory will qualify as an Accepted Membrane Roof System Assembly for a RoofStar Guarantee
(see exceptions noted below). Click here for a list of qualified testing facilities.

When an existing roof system is removed to expose the deck, the replacement roof is considered new
and therefore the design and construction of the replacement roof assembly must meet or exceed the
minimum requirements set out by the CSA Standard. Furthermore, a replacement roof must conform to
existing BC Building Code requirements for performance. For reference, see the BC Building Code
(latest edition), Div. A, Part 1, Section 1.1 General (cf. 1.1.1.1. Application of this Code, and 1.1.1.2.
Application to Existing Buildings).

When a Membrane Roof System incorporates materials that are not part of the RoofStar Guarantee
Program, appropriate substitutions for those materials shall be made from the list of RoofStar-accepted
Materials, and test data extrapolated in keeping with ANSI/SPRI WD-1, “Wind Design Standard Practice
for Roofing Assemblies” (cf. National Building Code of Canada 2015, A-5.2.2.2.(4) Membrane Roofing
Systems). The Design Authority, or in their absence, a Member, shall be responsible for the selection of
appropriate material substitutions.

In addition to the above, the CSA Standard also applies to circumstances where “the roof membrane may
be designated as the plane of air tightness.”

Partial Roof System Replacement
When only a part of a roof system is replaced, in which the roof deck is not exposed, the CSA Standard
does not apply. Nevertheless, partial roof replacements shall still conform to all other RoofStar
Guarantee requirements for roof system assembly set out in this Manual. Also refer to ANSI/SPRI WD-1,
“Wind Design Standard Practice for Roofing Assemblies” (cf. National Building Code of Canada 2015, A5.2.2.2.(4) Membrane Roofing Systems). All components utilized in a partial roof replacement shall still
be selected from the Accepted Materials section of this Manual.

Limitations
The Standard does not apply to:

  • Membrane Roof Systems with proven past performance for anticipated wind loads (National Building
    Code of Canada 2015, 5.2.2.2.5 Determination of Wind Load);
  • Ballasted roof assemblies or roof assemblies with non-ballast overburdens, where the membrane is
    secured against wind uplift by the ballast/overburden (National Building Code of Canada 2015, A-
    5.2.2.2.(4) Membrane Roofing Systems)

See the ‘decision tree’ illustration below in conjunction with these requirements and guidelines:

Decision tree for application of CSA A123.21 standards


3.8.1 Adhesives

In the past, roofing was installed over wood decks using mechanical fasteners. As construction technology progressed, many new types of decks developed bringing with them different securement requirements.

Concrete and other non-nailable decks dictated that an adhesive, usually bitumen, be used to apply the roof insulation and roofing. On sloped roofs where securement is required to prevent slippage, wood nailing strips must be cast into or fixed to the deck to permit mechanical attachment.

On steel decks, the initial use of bitumen as the adhesive has proven to be less successful than adhesion to concrete. Steel deck deflection can result in breaking the adhesive bond between the insulation and the deck. In addition, the use of bitumen may contribute to the fire hazards associated with steel decks.

Several adhesives successfully achieve adequate adhesion against wind uplift and lateral movement
resistance. Many factors can influence the strength achieved, including substrate characteristics and
preparation, bonding area, chemical compatibility of adhesive and insulation and moisture and
temperature conditions at time of application. To properly evaluate an adhesive for use in a roof
assembly, the design authority must

  • Know if it is acceptable to the membrane manufacturer
  • Understand the adhesion properties of the product, and
  • Consult the list of tested assemblies compliant with the CSA A123.21-14 Standard test method
    for the dynamic wind uplift resistance of membrane roofing systems.

D7 ROLL-FORMING MACHINES

.1 Metal roofing systems must be installed with clips and screws that are specified or listed as acceptable, by the metal panel machine manufacturer, for use with the metal roofing system.

.2 Contractors and owners of metal panel machines are responsible to meet or exceed the panel machine maintenance standards as established by the roll form machine manufacturer.

.3 Sheet steel roof panels may be roll-formed without stiffening ribs. Stiffening ribs are recommended to
help reduce oil-canning.

.4 Sheet steel roof panels may be roll-formed to a maximum of 500 mm (20”).

.5 The maximum width permissible for copper and zinc non-ferrous metal roof panels is 425 mm (17″);
these may be roll-formed with or without stiffening ribs or striations incorporated into the panels.


A6.10 Mechanical Attachment of Metal Cap Flashings

.1 The use of concealed in-seam fasteners is required. Metal flashings end joint S-lock seams must have
a minimum 1 screw type faster every 200 mm (8”). For standing seam applications, clips must be a
minimum 24 gauge in thickness, 38 mm (1-1/2”) wide, each secured with minimum 2 screws, and placed
a minimum of 1 clip every 200 mm (8”). Fasteners must have a low-profile head and penetrate the
substrate a minimum of 19 mm (3/4”).
.2 Any exposed fastening of metal flashings on the top of parapet surfaces is strongly discouraged and is
not permitted as the only attachment method. If top-surface fastening must be used because of a specific
job site condition, only appropriate screw-type fasteners with neoprene washers may be used. Only in-seam S-lock and standing seam clip fasteners are exempt from this requirement.
The flashing detail 10.2.1 reference notes, changes include:
1) Clips: Standing seams are fastened to wood blocking before applying the following length, using
screws and clips.
(4) Fasteners: S-locks and Double S-locks are screwed through the single leaf before applying the
following length. See RGC Guarantee Standard A6.8 for requirements.

Standing Seam clip

Single S-Lock


New Definitions (for section headings)

Low Slope Membrane Roofs

Low Slope Membrane Roofs include weatherproof membrane types of roof systems installed on slopes at
or less than 3:12 (1:4, or 14 degrees). In some instances, roof systems designed for low-slope
applications may be used on roofs with a slope greater than 3:12. Conversely, some steep-slope roof
materials may be used on roofs with slopes less than 3:12. Consult the RoofStar Guarantee Standards
for guarantee requirements, Guiding Principles and Recommendations in any application.

Low Slope Membrane Roofs employ a weatherproof covering or membrane that keeps water from
entering a building. These membranes may be comprised of one or more layers. They include Built-up
Roofs (BUR), which utilize multiple layers of felt laminated or bonded together with hot bitumen and
coasted on top with small rock (these are commonly referred to as ‘tar and gravel roofs’).

A Roof System (sometimes referred to as a roof assembly) is comprised of the structural roof deck, the
roof covering and any other components, including insulation.
The RoofStar Guarantee Standards for Low Slope Membrane Roof Systems include the following
membrane types in this section:

  • SBS Roofing Systems
  • EPDM (Thermoset Membrane) Systems
  • TPO/PVC (Thermoplastic Membranes) Systems
  • Other Flexible Membrane Systems (APP, etc.)
  • Built-Up Roofs (BUR)

Steep Slope Roofs

Steep Slope Roofs are water-shedding types of roof coverings installed on slopes greater than 3:12 (1:4,
or 14 degrees). In some instances, roof systems designed for low-slope applications may be used on
roofs with a slope greater than 3:12. Conversely, some steep-slope roof materials may be used on roofs
with slopes less than 3:12. Consult the RoofStar Guarantee Standards for guarantee requirements,
Guiding Principles and Recommendations in any application.

Steep Slope Roofs typically employ individual components that, when installed together in shingled
fashion, shed water from a roof.

A Roof System (sometimes referred to as a roof assembly) is comprised of the structural roof deck, the
roof covering and any other components, including insulation.

The RoofStar Guarantee Standards for Steep Slope Roof Systems therefore include the following system
types in this section:

  • Architectural Sheet Metal (ASM) Systems
  • Asphalt Shingle Systems
  • Cedar Shake & Shingle Systems
  • Tile & Slate Systems

 

May 15, 2016 - Technical Bulletin: CSA A123.21

TECHNICAL BULLETIN: CSA A123.21-14 Dynamic Wind Uplift Standard

Effective September 1, 2016, RCABC will require each manufacturer with accepted materials in the RoofStar Guarantee Program used in Low Slope (< 2:12) roof applications to provide RCABC with:

a) a current list of membrane assemblies, and

b) Roof System Assessment Reports for each assembly on that list,

that have been tested to and conform with the CSA A123.21-14 Dynamic Wind Uplift Standard.  These lists and Roof System Assessment Reports will be reviewed by the Technical Committee at the fall 2016 meeting.

Please note that the Roofing Practices Manual (RPM) now requires that mechanically fastened membrane systems conform to the CSA A123.21-14 Dynamic Wind Uplift Standard (2.1.1, A4.4).  Further amendments to the RPM are forthcoming, and will require conformity with the CSA A123.21-14 Dynamic Wind Uplift Standard for all tested systems (MARS, AARS and PARS), for projects bid after either April 1, 2017 or the release of the 2017 British Columbia Building Code, whichever comes first.

The CSA A123.21-14 test method applies only to membrane roofing systems whose components resistance to wind uplift is achieved by fasteners or adhesives. The current National Building Code of Canada recognizes the CSA A123.21-14 as the only method to determine compliance of a roof assembly for wind uplift. It is anticipated the BC Building Code will adopt this test method with the 2017 release.

The RCABC Roofing Practices Manual (RPM) will be listing the approved materials/assemblies after review by the Technical Committee at their meetings currently scheduled for September 2016 and January 2017.

The National Building Code provides for two exceptions where the wind uplift standard does not apply. The following are brief excerpts:

  1. Membrane roofing assemblies with proven past performance for the anticipated wind load need not comply – A-5.1.4.1.(5)
  2. Roofing systems that use ballasts, such as gravel or pavers, to secure the membrane against wind uplift – A-5.2.2.2.(4)

Please refer to the sections noted above in the 2015 National Building Code for the entire provision parameters.

Despite item 1 above, and regardless of each product’s past performance, RCABC will require conventional low slope roof membrane systems to meet the CSA A123.21-14 standard.

April 22, 2016 - New Accepted Materials (including ASM); Standards revisions including: insulation fastening; vegetative roofing; metal roof underlayment

New Accepted Materials

CertainTeed

  • Landmark Solaris Gold asphalt shingle
  • Landmark Solaris Platinum asphalt shingle
  • Highland Slate (name change only, from Centennial Slate)

IKO

  • Torchflex HD-FF-Base
  • Torchflex TP-HD-Cap
  • Torchflex HD-FF-Base
  • Modiflex HD-FS-Base
  • Modiflex HD-SS-Base
  • Modiflex MP-HD-Cap
  • Prevent MP-HD-Cap
  • Prevent TP-HD-Cap
  • Prevent Armourcool HD Cap
  • Fast-N-Stick HD Base
  • Armourbond HD Base
  • Armourbond HD Flash
  • Armourbond Flash Sand HD
  • Armourcool Granular TP-HD Cap
  • Carrara Armourcool HD

Soprema (Accessories only)

  • Soprajoint Plus 20 (expansion joint waterproofing membrane)
  • Soprajoint Plus 40 (expansion joint waterproofing membrane)
  • Soprajoint Plus 75 (expansion joint waterproofing membrane)
  • Soprajoint Plus 125 (expansion joint waterproofing membrane)
  • R-Nova Plus (polyurethane/acrylic-based waterproofing liquid membrane/coating)
  • R-Nova Plus Mastic (polyurethane/acrylic-based waterproofing liquid mastic)

Trail Roofing Ltd.

  • Roll Former VS-150 – Standing Seam Metal Roof System

B.F. Roofing Ltd.

  • Roll Former VS-150 (removed from list)

New/Revised Guarantee Standards

Red bold italics in this bulletin indicate changes made to the RoofStar Guarantee Standards wording.  Refer to the published RoofStar Guarantee Program Standards.


7.1.2 ASPHALT SHINGLE APPLICATION SPECIFICATIONS: STR-AS

2.1.11 Photovoltaic Panel (PV) and Solar Water  – Panel Mounting and Installation

  1. No PV or solar water panels may be mounted on shingled roofs having a pitch of less than 4:12.
  2. All PV or solar water panels designated for installation on a roof carrying a RoofStar Guarantee must display an authentic decal or plate indicating compliance with CSA Standard B272-93.
  3. Shingle underlayment requirements for STR-LS Asphalt Shingles shall apply to roof areas where PV or solar water panels are installed.
  4. All PV or solar water panels shall be mounted at least 150 mm (6 inches) from the finished roof surface (shingles).

2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A6.3 Strip-in Type Vents & Penetration Flashings

(Low Slope) .1 Strip-in type roof penetration flashings (lead, aluminum, stainless steel, copper, etc.) must be properly sized to fit pipe penetrations or alternatively, when pipes are irregular in size spray foam urethane insulation may be used to fill gaps between pipes and flashings. Strip-in type roof penetration flashings are only permitted for use with single pipe roof penetrations, must incorporate properly fitted settlement caps, and be a minimum height of 200 mm (8″) above finished roof surfaces. Pipes that are higher than standard flashings must have site formed non-bituminous flexible roof membrane storm collars sealed with compatible sealants and stainless steel clamps. Where shrink-wrapped terminations are employed, they shall be fitted with a stainless steel mechanical compression strap, and sealant shall be applied between shrink-wrap and penetration.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A4.4 Insulation Fasteners

.1 The roof area is divided into three areas (zones). The perimeter area is defined as 10% of the building width or 40% of the building height, whichever is less. In no case will perimeter area be less than 2.0 m (7′). The field area is defined as the remaining area after the perimeter is calculated. When the roof height is:

  • greater than 18 m (60’) and low-slope (slope is 2:12 or less) or
  • less than 18 m (60’) and pitched (slope is greater than 2:12),

Perimeter fastening along the entire eave will be enhanced to corner requirements. The corner area is defined by the perimeter in both directions at the corners. In no case will the corner area be less than 2.0 m x 2.0 m (7’ x7’). For corner enhancement of roofs in high wind locations (higher than 100 mph) or for roofs above 60’ refer to Section 3.8.5.

NOTE: To qualify for a RoofStar Guarantee, and to comply with the Guarantee Standards in 4.6 (below), mechanically attached membrane systems for projects bid after either April 1, 2017 or the issuance of the British Columbia Building Code, 2017 Edition (whichever comes first) must be fastened according to each manufacturer’s tested specifications complying with conforming to CSA A123.21-14 or a FM 1-90 Standard for assembly wind ratings.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.3 Planters, Landscaped and Green Roofs

.10 All vegetative roof systems using a modular system are required to meet CSA A123.24 “Standard test method for wind resistance of modular vegetated roof assembly”.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A8 BUILT IN MEMBRANE GUTTERS

.1 When a built in membrane gutter joins an RGC Guaranteed sloped roof; the gutter will be included by the Guarantee. Built-in membrane gutters that drain a roof not covered by an RGC Guarantee are not eligible for a Guarantee.

.2 Membranes installed as a gutter liner must be fully adhered and mechanically fastened at terminations. The accepted flexible membrane roofing system must be installed to RGC Guarantee Standards and the manufacturer’s printed instructions.

.3 Built in gutter membranes must extend up the roof slope to a point, which is 150 mm (6″) vertically above the maximum water level of the gutter or outside parapet height (see Section 7.5) “Built in Gutters for Water Shedding Roofing”).

.4 Fasteners shall be installed 4” or more above the maximum water line, and gutters must include a scupper overflow drain.


2.1.4 GUARANTEE STANDARDS FOR METAL ROOFING

D3 UNDERLAYMENT – Eave and Detail Protection

All metal roof systems require the installation of an RGC accepted underlay.

.1 For insulated metal roof systems…..

.10 Built in gutter membrane over insulation must transition onto underlayment membrane that is under insulation by use of sloped insulation and as detailed in construction drawing, Section 8.3 Built in Gutter Membrane / Underlayment Transition for Insulated Metal Roof Systems.

 .11 Minimum allowable thicknesses for a modified bituminous membrane underlayment is 1mm.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.6 Membrane Flashing (Stripping)

.4 All membrane flashing (stripping) terminating on a vertical surface must be mechanically fastened.  Fasteners shall be installed to suit/match vertical structural supports but shall be placed no more than 24” o/c.


2.1.4 GUARANTEE STANDARDS FOR METAL ROOFING

D1.4 Tie-In (Re-roofing or Building Additions):

Where a new roof is tied-in to an existing roof, the two areas must be isolated and separated by a curb joint properly constructed a minimum height of 125 mm (5”), attached to the structure and properly flashed. If job conditions or aesthetic considerations do not allow for a curb joint, written permission from RGC to eliminate curb joints must be obtained and a positive water cut-off must be installed to the deck to isolate the existing roof from the new roof.


7.1.2 ASPHALT SHINGLE APPLICATION SPECIFICATIONS: STR-AS

1.2 TIE-IN (Re-roofing or Building Additions):

Where a new roof is tied-in to an existing roof, the two areas must be isolated and separated by a curb joint properly constructed a minimum height of 125 mm (5”), attached to the structure and properly flashed.


7.1.4 ASPHALT SHINGLE APPLICATION SPECIFICATIONS: STR-LS

1.2 TIE-IN (Re-roofing or Building Additions):

Where a new roof is tied-in to an existing roof, the two areas must be isolated and separated by a curb joint properly constructed a minimum height of 125 mm (5”), attached to the structure and properly flashed.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A6.12 Guardrails

Guardrails should be installed only on vertical surfaces; attachment of guardrails to a horizontal surface is strongly discouraged.  Where guardrails are fastened through the top of copings, the base of the guardrail shall be flashed with a compatible reinforced membrane flashing material, applied according to the primary membrane flashing manufacturer’s specifications. 

Guardrails shall not direct water into a roof system by means of weep holes or the method of fastening, and mounts and flashings shall be installed at least 87.7 mm (3 ½”) above the roof surface.

NOTE: Detail drawing located in above section of the RPM


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.2 Protected and Modified Protected Membranes

.1 On all protected and modified……

.5 Pedestals: Installation……is required.

Proprietary (purpose-made) pedestals must have a 3mm (1/8”) integral spacer ribs for uniform spacing between pavers that provide a minimum 12.5 mm (1/2″) of vertical separation layer for airflow and leveling The choice of pedestal or drainage layer type is the responsibility of the design authority. Pedestals / drainage layers provide airflow for drying surfaces and assist in leveling. They should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.5 Walkway and Warning Zone Materials

A design authority or membrane manufacturer may specify a proprietary walkway protection system or warning zone membrane over the primary roof membrane. Walkway and warning zone materials are not part of the roofing membrane assembly but are typically accessory products that are placed over completed roof membranes. Subsequently the type and performance of any walkway or warning zone material is specifically excluded from coverage under the RGC guarantee, as is any detrimental effect the materials may have on the roof system.

Where walkways are employed, they must be designed to facilitate drainage of water.  To promote drainage, use accepted concrete-topped XPS insulation panels, or pavers located on purpose-made pedestals.  When pavers are used as the walkway material, they must be spaced no closer than 3mm (1/8″) and must be supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.5 mm (1/2″) of vertical separation layer for airflow and levelling.  The choice of pedestal or drainage layer type is the responsibility of the design authority. Pedestals provide airflow for drying surfaces and assist in leveling. They should not impede the flow of water or air, and should uniformly distribute the dead load of pavers and predicted live loads.

When primary roof membranes of contrasting colour are used for warning zones, membrane end lap off sets and ply side lap directions must be maintained. Staggered membrane end lap offsets may be positioned below primary roof membranes that are used for warning zones.


2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.6 Membrane Flashing (Stripping)

.1 Membrane flashing (stripping) details (with the exception of low parapets, cant strip edges and RGC accepted door sill details) must be designed to provide a minimum 200 mm (8″) sealed height above the finished roof surfacing. Surfacing is defined as the top of the roofing assembly, be it membrane, ballast or growing medium (soil).

.2 Roof Separation Joints (Expansion and Control Joints, etc.) / Equipment Sleepers / Safety Anchor Piers (poured in place pads) that are completely sealed (enveloped) with membrane flashing (stripping) may be less than 200 mm (8″) in height but must not be less than 100 mm (4″) in height above the finished roof surface.

.3 Doorsill membrane flashing (stripping) may be less than 200 mm (8″) in height but must not be less than 100 mm (4″) above the primary roof membrane and must be installed to comply with the following conditions:

  • A metal water stop flashing, formed with pan folded, welded or soldered corners must be mechanically attached to inside of doorsill framing or opening and be sealed with membrane flashing (stripping).
  • Membrane flashing, (stripping) or metal pan sill flashing must be installed at doorjamb framing or opening to a minimum height of 100 mm (4″) above doorsill framing or opening, prior to installation of doorjambs and doorsills. *Membrane gussets must be installed at sill corners.
  • Metal pan sill flashings or RGC accepted reinforced liquid flashing systems must be installed wherever clearances preclude the use of membrane flashing (stripping) to seal door sill details.
  • Slopes must be provided to direct water away from door sill details. (Overhangs are recommended wherever practical).
  • Overflow drains in that area must be installed a minimum 25 mm (1″) lower in height than adjacent door sills.
  • When design or safety codes require minimal elevation changes between a low door sill and an outdoor walking surface (ref. BC Building Code), the walking surface must be pavers placed on proprietary pedestals designed with a least 12.5 mm (1/2″) clearance between the finished roof surface and the paver. Alternatively, pea gravel may be used in place of pedestals, but must be installed above a dimple-style drainage board.

2.1.1 GUARANTEE STANDARDS FOR ALL LOW-SLOPE ROOFING SYSTEMS

A5.3 Planters, Landscaped and Green Roofs

.6 Where Extensive Vegetative Roof Assemblies are installed as part of the roofing specification and / or contract (Extensive Vegetative Roof Assemblies are defined as roof top gardens having minimal plant species diversity, irrigated only to establish plants, and typically having a soil depth of less than 150 mm or 6 inches) the costs for removal and replacement of soil to access the membrane, to investigate or repair leaks in the membrane, are included in the RGC Guarantee coverage. However, the removal and replacement of plants, irrigation lines and or equipment, electrical lines, landscape and decorative features such as concrete pads, statues, planters, large rocks, etc., to investigate or repair leaks in the membrane, is not included, and is the responsibility of others.  Subsequently, such access shall be provided and/or paid for by others.

.7 Where Intensive Vegetative Roof Assemblies are installed as part of the roofing specification and/or contract (Intensive Vegetative Roof Assemblies are defined as roof top gardens with diverse plant species, irrigated for maintenance and typically having a soil depth equal to or more than 150 mm or 6 inches), and where the soil thickness of Intensive Vegetative Roof Assemblies exceeds 200 mm (8″), the removal and replacement of soil and plants to access the membrane to investigate or repair leaks in the membrane is the responsibility of others, and such access shall be paid by others. In addition, the removal and replacement of plants, irrigation lines or equipment, electrical lines, landscape and decorative features such as concrete pads, statues, planters, large rocks, etc., to investigate or repair leaks in the membrane is also the responsibility of others, and such access shall be provided and/or paid for by others.

.8……

.9 Waterproofing liners in planters with structural walls, concrete curb or other materials, that do not incorporate pre-curbs shall be isolated and separated from the guaranteed roofing membrane and are specifically not accepted under the RGC guarantee. Conventionally insulated roof assemblies are required to have a minimum 12.5mm (1/2″) adhered approved RGC accepted gypsum overlay board, and insulation boards with a minimum compressive strength of 20 psi, under the roof membrane for extensive vegetated systems. Intensive Vegetative Roof Assemblies in excess of 200 mm (8″) or more in depth are not permitted over conventionally insulated roof systems.

 

November 13, 2015 - New Accepted Materials: Revised RoofStar Guarantee Standards for insulation; new Construction Detail

New Accepted Materials

Soprema

  • Colphene Flam 180 accepted modified SBS waterproofing base membrane
  • Colvent Base 830 accepted modified SBS 2-ply base membrane
  • Colvent Base 840 accepted modified SBS 2-ply base membrane
  • Sopraflash Stick 20 accepted self-adhering modified SBS 2-ply base membrane
  • Sopraflash Stick 40 accepted self-adhering modified SBS 2-ply base membrane
  • Sopralene Stick HR 20 accepted self-adhering modified SBS 2-ply base membrane
  • Sopralene Stick HR 40 accepted self-adhering modified SBS 2-ply base membrane
  • Antirock accepted modified SBS 2-ply waterproofing membrane
  • Trafikrock accepted modified SBS 2-ply waterproofing membrane
  • Trafikrock Base accepted modified SBS waterproofing base membrane
  • Sopratack (no acceptance required – an accessory product only)
  • Duotack 365 (no acceptance required – an accessory product only)

IKO Industries Ltd.

  • Protectobase 95 accepted overlay board
  • Protectobase 180 accepted overlay board

CertainTeed Corporation

DiamondDeck accepted asphalt shingle and metal roof underlayment for slopes 4/12 and greater

FT Synthetics

FT Synthetics Platinum, FT Synthetics Gold and FT Synthetics Silver accepted asphalt shingle and metal roof underlayment for slopes 4/12 and greater.

New/Revised Guarantee Standards

Red bold italics in this bulletin indicate changes made to the RoofStar Guarantee Standards wording.  Refer to the published RoofStar Guarantee Program Standards.

A2.5 Steel Decks

.1 Gypsum Board on Steel Decks Gypsum boards installed over steel decks as substrates for primary roof membranes must be a minimum thickness of 12.7 mm (1/2″) RGC accepted overlay boards. All edges of the gypsum board are to be fully or intermittently supported by the deck and end joints to be staggered (offset) 300 mm (12″) from adjacent board rows. A minus offset tolerance of 50 mm (2″) maximum will be permitted to compensate for variance in the manufacturers’ tolerance of differing board widths and lengths.

.2 Gypsum Board Attachment on Steel Decks When gypsum board is required on steel decks as a substrate overlay, the gypsum board can be fully mechanically fastened to the deck or adhered with proprietary polyurethane foam adhesives acceptable to the primary roof system manufacturer. Attachment must meet or exceed the CSA A123.21-14 requirements for the building dimensions and geographical location.

………………………………………………………………………………………………………………………………………………………….

A4.5 Insulation on Steel Decks

.1 When installing insulation or thermal barriers to steel decks, all edges of the first layer of insulation or thermal barrier shall be fully or intermittently supported by the deck when the total thickness of insulation is less than 2.7″.

.2 Mechanical fasteners must penetrate steel decks a minimum of 20mm (3/4″) and must be located in the top flutes only. Adhesive systems must be tested to meet or exceed the CSA A123.21-14 requirements and designed for the building dimensions and geographical location.

.3 The minimum thickness of insulation directly over fluted steel decks shall be a minimum of one-half the nominal flute width. Additionally, the minimum allowable thickness of expanded polystyrene or unfaced glass fibre insulation shall be 38 mm (1-1/2″), and the minimum thickness for extruded polystyrene, faced glass fibre, faced polyisocyanurate, etc. shall be 25 mm (1″).(For loose laid ballasted systems, see Section 2.1.3,C.4.3.)

………………………………………………………………………………………………………………………………………………………….

Detail 6.3.2 (new) (see 6.3.2 in the RoofStar Guarantee Standards)

 

November 10, 2015 - Electrical Safety Bulletin

Safety Bulletin: Electrical Conduit

The following safety bulletin was received from the BC Safety Authority regarding the protection of electrical raceways and cables under roof systems and decks. This is already a requirement under the RoofStar Guarantee Program, as it is a safety concern for the roofing installers and a fire risk to the building, but has now been brought to the attention of electrical inspectors and designers.

In order to have this be included in the Canadian Electrical Code and the National Building Code, we will need your support to document instances in the field. Please forward the details to Laurence Matzek, RoofStar Guarantee Director. Email: laurence@rcabc.org

PROTECTION OF ELECTRICAL RACEWAYS AND CABLES UNDER ROOF SYSTEMS AND DECKS

Date of Issue: August 26, 2015

NO: IB-EL 2015-05

Topic: Roofing and Electrical Equipment

References:
BC Electrical Code

The following bulletin provides guidance on the application BC Electrical Code: Sections 2 & 12.

The Roofing Contractors Association of British Columbia (RCABC) has reported a recent increase in occurrences of electrical raceways and cables being installed within, or adjacent to the underside of, roof systems or roof decks. Cables and raceways, installed in proximity to roof systems or roof decks may be subject to mechanical damage during roof installation or repairs. Nails and screws, used to penetrate the roofing from the top during the roof installation process, could easily penetrate electrical cables and raceways installed within or adjacent to roof systems or roof deck. This could result in electrical shock or fire hazards.

The figure below shows a typical roofing system and how a screw can easily penetrate electrical equipment (a conduit in this example):

2015-11-10 11_40_14-protection_under_roofs_ib-el_2015-05.pdf - Adobe Acrobat Pro

Diagram provided courtesy of Roofing Contractors Association of British Columbia

1. Rule 2-032 Damage and Interference requires that no person shall cause damage to an electrical installation or components thereof, except when it is necessary to disconnect or move components of an electrical installation during alterations or repairs; it is the responsibility of the person carrying out the alterations or repairs to ensure the electrical installation is restored to a safe operating condition.
Persons performing roof installation, alteration, or repair must ensure that they have identified and located all electrical equipment installed within or adjacent to the roof system or roof deck before carrying out their work. Mapping out of conduit and cable locations, disconnection of electrical power within work areas, and safe work practices will reduce or prevent electrical fire and shock hazards. Electrical contractors should ensure that electrical drawings accurately show locations of electrical raceways and conduits upon completion of their work. Alteration or relocation of electrical conduits, raceways, and equipment may only be performed under a valid electrical permit.

2. Rule 2- 200 General requires that electrical equipment must be protected and guarded against mechanical damage or other damage to which it is liable to be exposed.
The Roofing Contractors Association of British Columbia recommends that electrical raceways and cables can be protected from mechanical damage by ensuring that:

a) no electrical equipment is installed closer than 38mm (1.5”) as measured from the nearest point of the roofing system or deck; or

b) the electrical equipment is protected from mechanical injury by a steel plate not less than 5mm (3/16 inch) thick extends at least 38mm (1-1/2 inches) beyond the electrical equipment on each side.

2015-11-10 11_47_17-protection_under_roofs_ib-el_2015-05 (2).pdf - Adobe Acrobat Pro

Ulrich Janisch
Provincial Safety Manager, Electrical

For more information on the British Columbia Safety Authority, please visit our web site at: www.safetyauthority.ca

For further information, please contact the BC Safety Authority:

Toll free phone: 1-866-566-7233 (7:00 am to 6:00 pm, Monday to Friday)
Phone: 778-396-2000 (8:00 am to 4:30 pm, Monday to Friday)
Fax: 778-396-2064

Or Email us at: info@safetyauthority.ca

July 20, 2015 - New Accepted Materials; changes to RoofStar Guarantee Standards

See updates to Accepted Materials, highlighted in Sections 2.2, 3.6, 3.7, and 5.1.

April 9, 2015 - New Accepted Materials; Revised RoofStar Guarantee Standards for multi-layered insulation, planters

New Accepted Materials

Inter-Wrap Inc.
RhinoRoof U20 Asphalt Shingle and Metal Roof underlayment
Malarkey Roofing Products
Secure Start Asphalt Shingle underlayment

New/Revised Guarantee Standards

Section A4.1 Insulation and Overlay Boards (illustration to follow)
.1 Multi Layering:
All square edge flat format insulation boards greater than 67.5mm (2.7”) in thickness shall be installed in multiple layers. With the exception of systems that include tapered insulation, individual layers are not to exceed 60% of total insulation/overlay board assembly. Multi layering of plastic foam insulation is required for all adhered, mechanically attached, and ballasted low slope roof assemblies. In addition, all slope format plastic foam insulation boards greater than 150mm (6”) in thickness shall be installed in multiple staggered layersor alternatively, be installed under two (2)offset/staggered layers of RGC accepted insulation overlay boards.

.2 Overlay Boards: RGC accepted insulation overlay boards shall be installed over all insulations (EPS, XEPS, Polyisocyanurate) on all adhered low slope roofing systems. When heat sensitive insulations (EPS,XEPS) are used with heat welded membrane seams an accepted overlay board must be installed. Overlay board thickness shall not exceed 50mm (2″). Fibreboard shall not be used with flame-welded seams.

.3 Insulation and overlay board joints are to be offset/staggered 300 mm (12″) from adjacent layers and rows. A minus offset tolerance of 50 mm (2″) maximum will be permitted to compensate for variance in manufactured tolerance of differing insulation board widths and lengths. The exception is sloped insulation boards that are generally installed soldiered fashion to adjacent rows; and the first layer of overlay board over heat sensitive insulation to facilitate joint taping. However, the uppermost layer of insulation or overlay board directly below membranes shall have joints that are offset/staggered from adjacent layers and rows.

Section A5.3 Planters, Landscaped and Green Roofs

Last paragraph modified as follows:

.9 Waterproofing liners in planters with structural walls, concrete curb or other materials, that do not incorporate pre-curbs shall be isolated and separated from the guaranteed roofing membrane and are specifically not accepted under the RGC guarantee. Conventionally insulated roof assemblies are required to have a minimum 12.5mm (1/2″) adhered approved RGC accepted gypsum overlay board, and insulation boards with a minimum compressive strength of 20 psi, under the roof membrane for extensive vegetated systems (less than 200 mm, 8″ in depth). Intensive vegetated systems (200 mm, 8″ or more in depth) are not permitted over conventionally insulated roof systems.

November 17, 2014 - New RoofStar Guarantee Standards for electrical conduit

Guarantee Standard A2.3 Conduit   
Guarantee standard A2.3 regarding conduit within a low slope roof system first appeared in the Roofing practices Manual in the 1980’s. It restricted the installation of conduit on top of the roof deck unless express written permission was removed and further definition regarding EMT and cabling was added.

Aside from the immediate problems of reduced insulation thickness over the conduit and air barrier continuity, fasteners used for insulation boards and/or inseam membrane attachment easily penetrate the conduit causing electrical and possible fire danger. Electrical codes in other building jurisdictions were modified in 2011 to reflect this, referencing the possible conductor damage during initial roof installation and future re-roofing.

October 31, 2014 - New Accepted Materials; revised RoofStar Guarantee Standards for Asphalt Shingles, low-slope insulation

New Accepted Materials

AR EPS Foam
AR EP Foam – Types 1, 2, and 3 EPS insulation

New/Revised Guarantee Standards

Section 7.1.2 Asphalt Shingle Application Specification: STR-AS
#30 asphalt saturated felt and nail applied proprietary synthetics be removed from STR-AS as an eave protection membrane.

Section A4 Insulation & Overlay Boards

“Plastic foam” to be deleted from A4.1 in order to include mineral wool insulation boards in multi-layering.

April 4, 2014 - New Accepted Materials; updated RoofStar Guarantee Standards for vegetated roof systems, membrane vertical termination

New Accepted Materials

Building Products of Canada Corp.
Mystique 42, Laminated, accepted asphalt shingle

Building Products of Canada Corp.
Dakota – Traditional 3-tab, accepted asphalt shingle

Building Products of Canada Corp.
Yukon – Traditional 3-tab, accepted asphalt shingle

Building Products of Canada Corp.
Manoir, Laminated, accepted asphalt shingle

New/Revised Guarantee Standards

New/Revised RGC Guarantee Standards
Section 3.3.0. General
Wording in this section has been simplified to read and better definitions of roof slope added

References to the British Columbia Building Code 2006, have been removed from this Section

Section 2.1.1. Guarantee Standards A.5.3.3 and A.5.3.4
Guarantee Standards A.5.3.3 and A.5.3.4 are amended to accommodate the use of vegetation trays in a vegetated roof system

Section 2.1.3. Guarantee Standard C8.5

Wording changed to add – “The heat welded field membrane must be turned up the vertical surface a minimum of 100 mm (4″) or a heat welded base sheet transition gusset extending 100 mm (4″) onto the roof and upstand surfaces be installed”

November 1, 2013 - New Accepted Materials; Revised Guarantee Standards for insulation cover boards, definition of drainage in roof slopes

New Accepted Materials

Owens Corning Canada LP
Deck Defense, accepted asphalt shingle underlayment for roofs 4/12 and over

Owens Corning Canada LP
Weatherlock G membrane, accepted asphalt shingle eaves protection and underlayment

New/Revised Guarantee Standards

Section C4.1.1. Fastener Systems and C4.1.2 Adhered Systems
With the development of thicker and more heat resistant coverboards, a single minimum 1/2″ layer used over heat sensitive insulations for torch applied SBS membrane installations is acceptable when joint protection is used

Section A1.3. Roof Slopes
Wording in this section is modified to remove ’48 hours’ as the time for effective drainage and replaced with ‘within a reasonable amount of time’

June 20, 2013 - New Accepted Materials; Revised Guarantee Standards for eave protection

NEW Accepted Materials

Firestone Building Products Canada
Rubbergard Max, RubberGard Eco White non-reinforced EPDM, UltraPly Platinum TPO, UltraPly XR 100 & 115 TPO, accepted flexible membrane products

IKO Industries Ltd.
Grandeur SBS Modified Laminated Architectural Shingles, accepted shingles

Lexsuco 2010 Corporation
Lexcan EPDM Membrane, Sure-Flex PVC, Sure-Weld TPO, accepted with condition that all associated materials are also manufactured by Carlisle SynTec

New/Revised Guarantee Standards

Eave Protection
The point of installation is extended to 24″ past the inside face of the wall in high snow load areas as per 3.5 KPA noting that individual requirements may dictate additional eaves protection.

February 1, 2013 - New Accepted Materials (including ASM); Revised Guarantee Standards for reversed laps (low slope membranes) and ASM requirements

NEW Accepted Materials

Nelson Roofing & Sheet Metal Ltd.
New Tech Machinery SS100 and SS150, accepted metal roofing systems

Alpha Roofing & Sheet Metal Inc.
Schlebach Quadro 1.5″ mechanical lock, accepted metal roofing system

Carlisle SynTec Canada
Sure Weld 155 mill (080) TPO; FleeceBACK TPO – 100 mil (045), 135 mil (060), 155 mil (080) thicknesses, AFX TPO (hot mopped)-  100 mil (045), 135 mil (060), 155 mil (080) thicknesses, accepted TPO products

Carlisle SynTec Canada
Sure-Tough 075 reinforced EPDM, Sure Seal 145 mil (090) Non-Reinforced EPDM, FleeceBACK EPDM 100 mil (045), 115 mil (060), 145 mil (090) thicknesses, AFX EPDM (hot mopped), 100 mil (045), 115 mil (060) thicknesses, accepted EPDM products

Carlisle SynTec Canada
Sure-Flex PVC – 050, 060, 080 thicknesses; Sure-Flex FRS PVC – 050, 060, 080 thicknesses; Sure-Flex KEE PVC – 050, 060, 080 thicknesses, Sure-Flex KEE PVC – 050, 060, 080 thicknesses; Sure-Flex KEE FleeceBACK PVC – 050, 060 080 thicknesses, accepted PVC products with a subject that the PVC KEE membranes be separated on the project list to show a 2 year history of use in a similar climactic area

Soprema Canada
Soprasmart Board 180, Sopraboard ISO HD 180, accepted combined membrane and cover board systems

Soprema Canada
Soprafix 635 base sheet with a Soprafix 655 or 656fr cap sheet, accepted mechanically fastened 2 ply SBS modified bitumen membrane

Durolast Roofing Inc.
50 mil and 60 mil PVC membranes, limited to acceptance of rolled membrane products and accessories only

New/Revised Guarantee Standards

Section C8.5.5 – Guarantee Standards
Revised to include an extra step in the method description for alternative reverse lap application of a self adhered SBS modified bitumen base sheet membrane followed by a torch applied field membrane.

Guarantee Standards
Metal panel rollforming machines that produce a currently accepted panel, acquired by active member companies, can be accepted in the RoofStar guarantee program by the technical manager.

November 6, 2012 - New Accepted Materials (including ASM); Revised Guarantee Standards for roof slope, synthetic underlayments, and wind uplift

NEW Accepted Materials

Hunter Panels
H-Shield CG, H-Shield Premier, H-Shield Composite, accepted polyisocyanurate insulation and overlay boards

Marine Roofing & Sheet Metal Ltd.
MR-100 Snap Lock, MR/S-150, MR/S-100, accepted standing seam metal roofing systems

Protecto Wrap Company
Jiffy Seal Ice and Water Guard HT and Jiffy Seal Butyl Ice and Water Guard HT, accepted underlayment/eaves protection for metal panel and asphalt shingle roof systems

Interwrap Inc.
Titanium UDL-25 Plus, Titanium UDL-30 and Titanium UDL-50, accepted metal roof underlayment

New/Revised Guarantee Standards

Section A4.2 – Guarantee Standards
Wording be added to allow increased slopes for systems that do not use oxidized asphalt as an adhesive and have additional restraint

Section 8.2.1
Revised to include accepted proprietary synthetic underlayments as acceptable for use on uninsulated wood decks sloped over 4″ in 12″

Section A4.7.4 and C5.3 – Guarantee Standards
Effective January 2014, requirements for testing and conformance of wind uplift pressure have changed with respect to proprietary mechanically attached or adhesive roof assemblies.

April 13, 2012 - New Accepted Materials (including ASM); Revised Guarantee Standards for reference to FM 1-90

NEW Accepted Materials

Alpha Roofing & Sheet Metal
Knudson P2401 System, accepted standing seam metal roofing system

Sika Canada
Sika Sarnifil Rhinobond System, accepted alternate fastening system for Sika’s PVC membranes

Soprema Canada
Soprarock MD and Soprarock MD Plus, accepted overlay boards
Xpress Board Coated, accepted composite board insulation and overlay board

Roxul
Roxul MonoBoard and MonoBoard Plus, accepted overlay boards

Siplast Canada
Paratherm and Paratherm K polyisocyanurate insulation, accepted insulation boards

IKO Industries
IKO Royal Estate Asphalt Shingles, accepted asphalt shingles

CGC
CGC Securock Gypsum Fibre Roof Board and Securock Glass Matt Roof Board, accepted overlay boards

Firestone Building Products
Firestone Isogard HD Composite, accepted insulation board

New/Revised Guarantee Standards

Tab 2
Wording be added to A1.1 referring the reader to Tab 3.1.3 where further explanation can be made regarding Factory Mutual FM 1-90 assemblies.

January 18, 2012 - Bulletin: Moisture on Polyisocyanurate Insulation Facers

Moisture on Polyisocyanurate Insulation Facers
There have been reports of moisture accumulation within bundles between the fibreglass faced polyisocyanurate insulation boards on various jobsites throughout BC. The problem has been sporadic; occurring or not occurring under what appears to be similar circumstances. At this time there is no conclusive evidence of the moisture source but the wet material has been rejected for use, causing production delays and related costs of replacement to all parties involved.

If bundles containing wet insulation facers are found on an RGC guarantee project, please report the guarantee number and description to laurence@rcabc.org. The report should include: – photos of the wet insulation facers, bundle wrapper labels, and product as stored
– condition of the product when delivered to the site
– quantity of product involved
– length of time product was stored on the roof and weather conditions exposed to
– any other circumstances noted

October 28, 2011 - New Accepted Materials (including ASM); Revised Technical Drawing; Revised Guarantee Standards for shingles and ridge caps

NEW Accepted Materials

VicWest
Prestige Snap-Lock Metal Roof System, accepted metal panel roof system.

Carlisle SynTec Systems Canada
Secureshield HD polyisocyanurate coverboard, accepted insulation overlay board for Carlisle roof systems.

IKO Industries
Storm Shield Ice & Water Protector, eaves protection for asphalt shingle roof systems.

New/Revised Guarantee Standards

Tab 7.1.5 page 4
Depiction of plastic cement applied at metal drip edge flashing will be removed.

Tab 7.1.2 and Tab 7.1.4
All proprietary asphalt shingle ridge cap material installed on RoofStar guarantee projects must be made by the same manufacturer as the field shingles.

June 18, 2011 - New Accepted Materials (including ASM); Revised Guarantee Standards for insulation bearing plates, gypsum boards on vertical surfaces, electrical conduit on roof decks, eave protection

NEW Accepted Materials

Owens Corning Canada
Type IV Foamular Extruded Expanded Polystyrene insulations

Firestone Building Products
UltraFlash Liquid Membrane Flashing and UltraFlash reinforcement fabric – modified bitumen liquid membrane flashing system

Nelson Roofing Ltd.
New Tech Machinery mechanical lock SS150 and SS100 metal panels – metal panel roof system

Raven Roofing Ltd.
New Tech Machinery Snap Lock 2 675 panel, SS150 and SS100 panels, Quadro Snap Seam – FFQ100 panel – metal panel roof systems

Cascade Roofing & Waterproofing Ltd.
New Tech Machinery Snap Lock metal panel – metal panel roof system

New/Revised Guarantee Standards

D5.2 INSULATION bearing plates

When panel clips with bearing plates are installed directly over insulation the compressive strength of the insulation must be a minimum of 138 kPa (20 psi) and the maximum thickness of the insulation shall not exceed as specified in the proprietary designed assembly. Drag load fastening must be designed to withstand the anticipated loading. Insulation bearing plates are not permitted for use in high snow load regions unless expressly accepted in writing under the seal of a structural engineer.

A1.5.3 Gypsum boards on vertical surfaces must be RGC Accepted overlay boards with fibreglass facers and silicone treated cores. On steel framed walls, fibreglass faced silicone treated gypsum boards with a minimum thickness of 12mm (1/2”) or fibre-mat reinforced cement boards with a minimum thickness of9.5mm (3/8”) that conform to ASTM C1325-04 are an acceptable vertical substrate to receive roofing.

The installation of roof membrane to the surface must be as per the membrane manufacturer’s requirements for that substrate.

A2.3 Conduit, EMT, cable and/or piping applied on the top of roof deck surfaces shall not be acceptable on new construction projects.

If conduit is present on decks in re-roofing projects, the deck must be made smooth and even to the satisfaction of the accepted roof inspection firm. The upper layer of insulation must cover the conduit, EMT, cable and/or piping.

Tab 7.1.2 STR AS
1.5 Eave protection – RGC accepted self-adhered, rubberized asphalt sheet material (see tab 3.15) #30 non-perforated asphalt saturated felt, or RGC accepted proprietary underlayments that meet or exceed the requirements for #30 non-perforated asphalt felt, CSA A123.3-05 (2010).

January 31, 2011 - Revised Guarantee Standards for overlay boards

NEW Guarantee Standard (Effective January 28, 2011)

A4.1.3 Overlay boards – RGC accepted insulation cover or overlay boards shall be installed over all plastic foam insulations on all adhered low sloped roof assemblies. All insulation types shall have a minimum compressive strength of 110 KPa (20 psi) when installed without a cover board under mechanically attached membranes.

Former Guarantee Standard
A4.1.3 Overlay boards
– RGC accepted insulation cover or overlay boards shall be installed over all plastic foam insulations on all adhered and mechanically attached low sloped roof assemblies.

 

November 1, 2010 - New Accepted Materials; Revised Guarantee Standards for material storage, asphalt shingles, concrete decks, thermal barriers on steel,

NEW Accepted Materials

Garland Canada Inc.
SBS Cap sheets and base sheets accepted or use as waterproofing membrane systems.

Garland Canada Inc.
GMX Hot-applied Rubberized Waterproofing Membrane accepted for use as waterproofing systems.

Garland Canad Inc.
SBS Roofing Membranes accepted for use as roofing membranes under RPM Tab 5 in the RGC Guarantee program. And Garland Canada Inc. Fiberglass Felts and SBS Cap Sheets Systems accepted under RPM 4.6 Proprietary BUR.

IKO Industries Ltd.
IKO MS DETAIL with reinforcement scrim, accepted for use as a liquid applied membrane flashing.

IKO Industries Ltd.
Manufacturer’s proprietary adhesive applied modified bituminous system that utilizes IKO Cold Gold brand adhesive, as tested by NRC for compliance with CSA A123.21-04 Wind Uplift Standard for Adhesive Applied Low Slope Roof Assemblies.

SMT Structure Monitoring Technology
Roof Moisture Survey System accepted for use as a moisture survey and monitoring system in the RGC waterproofing program.

WR Grace
Underlayment Membranes for cedar shakes and shingles, asphalt shingles, as well as metal roof panels accepted for use in the RGC guarantee program.

New/Revised Guarantee Standards

A1.2 Material Storage & Protection – All installed roofing system materials that are susceptible to moisture damage shall be made weather tight by end of each work day.

Asphalt Single specification 7.1.2 Steep & 7.1.4 Low Slope as well as Cedar Shake and Shingle sections in Tab 7.2 now include the following requirement. A6.3 Strip in Type vents and penetration flashing (low slope) – strip-in type roof penetration flashings (lead, aluminium, stainless streel, copper, etc. must be properly sized to fitted roof pipe penetrations or alternatively when pipes are irregular in size oversized flashings with sprayed foam insulation may be used.

All organic based asphalt shingles are, as of this date, NOT accepted for use in the RGC guarantee program and all listings for organic based asphalt shingles will be removed from the RGC Accepted Materials list.

Vent Heights – RGC guarantee standards are now a minimum of 200mm (8″) on roof slopes of less than 1:3 (4″ in 12″) for all roofing material types.

Concrete Cold Joints – the following requirements for concrete cold joins have now been added to the RGC guarantee standards E Waterproofing, E2.2 Concrete Decks, .4 Cold joints between concrete pours, at horizontal concrete decks and vertical walls that are at or below grade, shall be sealed and covered with waterproofing membrane flashing. Membrane  flashing shall cover all deck/wall transitions, shall lap over cold joints and onto horizontal slabs (deck) a minimum of 200mm (8″) and be compatible with both the deck and wall waterproofing or damp proofing materials. Or alternatively, when materials at deck/wall transitions are not compatible the use of compatible sealants and termination bars that create a watertight lap that is a minimum width of 200mm (8″) is acceptable.

Insulation & Thermal Barriers on Steel Decks – A4.5.1 When installinginsulation or thermal barriers directly over steel decks, all edges of the insulation orthermal barriers are to be fully or intermittently supported by the deck.