Preface

1 RCABC Guarantee Corp. (RGC) Technical Committee

The RCABC Roofing Practices Manual and the Standards are reviewed and revised by the RCABC Guarantee Corp. (RGC) Technical Committee, which meets no less than three times per calendar year, and also reviews applications submitted to the RCABC for the acceptance of materials used in the RoofStar Guarantee Program.

The RGC Technical Committee is comprised of representatives from the four principal regions of British Columbia - Vancouver Island, the South Coast (Vancouver and the Lower Mainland), the Interior, and the North. The RCABC appoints six Active Members ("Contractors") and six RGC-accepted Observers, each for a term of no more than six consecutive years. RCABC Technical Department staff prepare the agenda and participate in each meeting but are non-voting members. The Committee Chair is appointed by the RGC Board of Directors. The regional representation matrix, and term limits for appointed Committee members, is governed by RCABC policy and aims for balance in technical expertise and experience.

RGC Technical Committee members (as of February 1, 2025)

M. Aase	AASE Roof Inspection Ltd. Prince George, BC	Northern Region	RGC Accepted Observer	Voting Member
B. Bennett	Mack Kirk Roofing & Sheet Metal Ltd. Port Coquitlam, BC	Lower Mainland	RCABC Active Member (Contractor)	Voting Member
G. Bollman	GRC Columbia Roofing Inc. Aldergrove, BC	Lower Mainland	RCABC Active Member (Contractor)	Chair | Voting Member
S. Campbell	Rimkus Consulting Group Inc. Richmond, BC	Lower Mainland	RGC Accepted Observer	Voting Member
B. Carver	Apex Building Sciences Inc. Abbotsford, BC	Lower Mainland	RGC Accepted Observer	Voting Member
B. Finucan	Bothwell-Accurate Company (BC) Ltd. Surrey, BC	Lower Mainland	RCABC Active Member (Contractor)	Voting Member
S. Goldie	Admiral Roofing Ltd. Prince George, BC	Northern Region	RCABC Active Member (Contractor)	Voting Member
M. Gruber	Western Roofing (Master Roofers) Ltd. Kamloops, BC	Interior Region	RCABC Active Member (Contractor)	Voting Member
J. Guldin	Read Jones Christoffersen Ltd. Victoria, BC	Vancouver Island	RGC Accepted Observer	Voting Member
J. Klassen	Roofing Contractors Association of British Columbia Langley, BC	RCABC	RoofStar Technical Advisor	Non-voting Member
A. Knoll	Pacific Interior Roof Consulting & Inspection Ltd. Kelowna, BC	Interior Region	RGC Accepted Observer	Voting Member
H. Louwerse	Stantec (formerly Morrison Hershfield Ltd.) Burnaby, BC	Lower Mainland	RGC Accepted Observer	Voting Member
L. Matzek	Roofing Contractors Association of British Columbia Langley, BC	RCABC	Director, RoofStar Guarantee Program	Non-voting Member
T. Strahl	Cascade Roofing & Exteriors Inc. Chilliwack, BC	Lower Mainland	RCABC Active Member (Contractor)	Voting Member
J. Vanderkerkhove	Parker Johnston Industries Ltd. Victoria, BC	Vancouver Island	RCABC Active Member (Contractor)	Voting Member
D. Wells	Roofing Contractors Association of British Columbia Langley, BC	RCABC	RoofStar Technical Advisor	Non-voting Member

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2 Standards Development

Each Standard published in this Manual began with volunteer time by RCABC members and others. Standards are revised by RCABC staff with the oversight of the RGC Technical Committee and the approval of the RGC Board of Directors, but the following people helped shape the first versions of the Standards you read and use today.

2.1 RGC Standard for Vegetated Roofs

First edition: June 13, 2024

The RGC struck a volunteer Advisory Committee in October 2023 to review and revise a first draft of the standard produced by RCABC staff. The following people (listed in no particular order) formed the Advisory Committee, some meeting regularly as a group, others providing a final review with recommendations after completion of the final draft:

• Torsten Ball – JRS Engineering (Burnaby, BC)
• Denis Gingras – Hydrotech Corp. (Montreal, PQ)
• Brandon Goedecke – Flynn Canada (Surrey, BC)
• Chris Bourgault – Duron Specialty Contracting Group Ltd. (Burnaby, BC)
• Chris Kann – Carlisle Syntec (Carlisle, PA)
• Christian Mahlstedt – Ginkgo Sustainability (Toronto, ON)
• Roxanne Miller – Soprema Canada (Montreal, PQ)
• Nastaran Moradinejad – PFS Studio (Vancouver, BC)
• Elizabeth Hart Morris – Green-Up LLC (Portland, OR)
• Colin Tougas – Morrison Hershfield/Stantec (Burnaby, BC)
• Ryan Vasseur – Architek Sustainable Building Products Inc. (Vancouver, BC)
• Julia Polevaya – ZinCo Canada (formerly head of ZinCo Ukraine)(Metro Vancouver, BC)
• Jeremy Wright – ZinCo Canada (Toronto, ON)
• Pearl Yip – PWL Partnership (Vancouver, BC)
• Laurence Matzek, Director, RoofStar Guarantee Program
• James Klassen, RoofStar Technical Advisor

2.2 RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs

First Edition: June 16, 2022

The RGC struck a volunteer Advisory Committee in the fall of 2021 to review and revise a first draft of the standard produced by RCABC staff. The following people (listed in no particular order) formed the Advisory Committee advisory committee, comprised of RCABC member contractors, member manufacturers, and consultants/accepted Observers:

• Kim Wozny - GRC Columbia (Abbotsford, BC)
• Denis Gingras – Hydrotech Corp. (Montreal, PQ)
• Bruce Duffield - Henry Company (Vancouver, BC)
• Harold Louwerse - Stantec (formerly Morrison Hershfield Ltd. (Burnaby, BC)
• Kevin Nicol - Bothwell-Accurate (Surrey, BC)
• Pat Fagan - Carlisle Syntec Systems (Toronto, ON)
• Laurence Matzek, Director, RoofStar Guarantee Program
• James Klassen, RoofStar Technical Advisor

2.3 RGC Standard for Asphalt Shingle Roofs

First Edition: October 18, 2019

The RGC struck a volunteer Advisory Committee in the spring of 2019 to review and revise a first revision draft of the RGC Standard for Asphalt Shingle Roofs, produced by RCABC staff. The following people (listed in no particular order) formed the Advisory Committee advisory committee, comprised of RCABC member contractors, member manufacturers, and consultants/accepted Observers:

• Dean Carate - BC Roof Inspections (Surrey, BC)
• Drew Newman - Malarkey Roofing Products (Vancouver, BC)
• Eric Dennis - Roy Dennis Roofing (2005) Ltd. (Richmond, BC)
• Jeff Estey - CertainTeeed LLC (Vancouver, BC)
• Marty Oldford - Mack Kirk Roofing & Sheet Metal Ltd. (Port Coquitlam, BC)
• Sean Lang - Specifex Building Science Inc. (Langley, BC)
• Laurence Matzek, Director, RoofStar Guarantee Program
• James Klassen, RoofStar Technical Advisor

2.4 RGC Standard for EPDM/TPO/PVC Roofs

First Edition: October 18, 2019

The three single-ply Standards published in the RPM were all developed at the same time. Prior to their first edition date, RGC requirements for single-ply systems largely remained rudimentary. With the help of a volunteer Advisory Committee in the winter of 2018/2019 the RGC developed strong, comprehensive Standards for EPDM, TPO, and PVC roof systems. The following people (listed in no particular order) formed the Advisory Committee advisory committee, comprised of RCABC member contractors, member manufacturers, and consultants/accepted Observers:

• John Powers - Flynn Canada (Kelowna, BC)
• Mike MacDonald - Continental Roofing (Delta, BC)
• Pedro Padron - Carlisle Syntec Systems (Vancouver, BC)
• Chris Dees - Elevate Commercial Roofing Systems (formerly Firestone)(Vancouver, BC)
• Larry Lemke - JRS Engineering (Burnaby, BC)
• Peter Cox - McCuaig & Associates Engineering Ltd. (Burnaby, BC)
• Ian Moriarty - Carlisle Syntec Systems (Toronto, ON)
• Laurence Matzek, Director, RoofStar Guarantee Program
• James Klassen, RoofStar Technical Advisor

(List TBA)

2.5 RGC Standard for SBS-Polymer Modified Bituminous Roofs

First Edition: June 14, 2018

The current iteration of this Standard was reviewed and revised internally by RCABC staff, and then ratified by the RGC Technical Committee and the RGC Board of Directors:

• Laurence Matzek, Director, RoofStar Guarantee Program
• James Klassen, RoofStar Technical Advisor

2.6 RGC Standard for Architectural Sheet Metal Roofs

First Edition: June 14, 2018

3 Revision History

This Manual was revised effective February 1, 2025 and replaces previously published content dated November 1, 2024.

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4 History of the Roofing Practices Manual

The RGC Roofing Practices Manual ("RPM", or "Manual") is the official collection of

• published Standards necessary to design and build a waterproofing or water-shedding project intended to qualify for a RoofStar Guarantee.
• listed materials formally accepted by the RCABC Guarantee Corporation (RGC), with which a project must be constructed to qualify for a RoofStar Guarantee.
• information, technical standards and other resources intended to aid the Design Authority in specifying such a project.

The RPM was first produced in 1988 by the RCABC Guarantee Corporation (RGC) Technical Committee, under the direction of the RGC Board of Directors. Its initial development was supported by representatives of the

Architectural Institute of British Columbia (AIBC)

Intergovernmental Roofing Advisory Group (IRAG)

National Research Council (NRC)

Roofing Inspectors and Consultants Association of British Columbia (RICABC)

Development of the RPM received its major impetus when the National Research Council, represented by its Industrial Research Assistance Program, provided financial assistance to the RCABC, so that a British Columbia Institute of Technology graduate could be hired to assist in the compilation of the very first Manual. Various extracts of information were authorized for reference by the

Canadian Roofing Contractors Association (CRCA)

National Roofing Contractors Association (NRCA)

and further valuable guidance was made available to the RCABC by the

Alberta Roofing Contractors Association (ARCA)

Roofing Industry Educational Institute (RIEI)

The completion of the 1988 Edition of the RPM initiated the development and subsequent expansion of the RCABC Guarantee for Workmanship and Materials, now called the RoofStar Guarantee Program. The RGC Roofing Practices Manual is an evolving document that is supported by RCABC Members, RGC Accepted Observers, the NRC, the British Columbia design community and other construction associations. It is revised and updated no fewer than three (3) times annually. Revisions to the RPM are published online (Technical Updates) and have been digitally updated since November 2010. Previous Technical Updates may be available from the Technical Department of the RCABC, upon written request.

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