Preface

1 RCABC Guarantee Corp. (RGC) Technical Committee

H. Schlamb

G. Bollman

J. Bourget

S. Goldie

J. Powers

J. Wilson

J. Klassen

A. Knoll

S. Lang

A. Martin

L. Matzek

S. Wagner

J. Watson

D. Wells

Chillwack Roofing Ltd.
Chilliwack, BC
RCABC Active Member (Contractor)

GRC Columbia Roofing Inc.
Aldergrove, BC
RCABC Active Member (Contractor)

RDH Building Sciences Inc.
Burnaby, BC
RGC Accepted Observer

Admiral Roofing Ltd.
Prince George, BC
RCABC Active Member (Contractor)

Flynn Canada Ltd.
Kelowna, BC
RCABC Active Member (Contractor)

Top Line Roofing Ltd.
Victoria BC
RCABC Active Member (Contractor)

Roofing Contractors Association of British Columbia
Langley, BC
RoofStar Technical Advisor

Pacific Interior Roof Consulting & Inspection Ltd.
Kelowna, BC
RGC Accepted Observer

Inter-Provincial Roof Consultants Ltd.
Langley, BC
RGC Accepted Observer

Morrison Hershfield Ltd.
Burnaby, BC
RGC Accepted Observer

Roofing Contractors Association of British Columbia
Langley, BC
Director, RoofStar Guarantee Program

Atlas-Apex Roofing (BC) Ltd. Richmond, BC
RCABC Active Member (Contractor)

J. Watson Roofing Consulting Inc.
Victoria, BC
RGC Accepted Observer

Roofing Contractors Association of British Columbia
Langley, BC
RoofStar Technical Advisor

Chair




















Non-voting













Non-voting










Non-voting

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2 Revision History

This Manual was revised on February 5, 2021 and replaces the Manual dated October 30, 2020.

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3 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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4 Structure of the Roofing Practices Manual

The structure of the RPM has changed over time. Originally published as a paper-based binder with twelve tabs, it was digitized in 2012 and converted to an online wiki format. In 2016, the wiki-based RPM was restructured to form eight Divisions, A through H.

Division A: Purpose, Scope and Guarantee

Division A contains important information about the RPM and the RoofStar Guarantee Program, including any limitations and exclusions applicable to a RoofStar Guarantee.

Division B: Essential Elements

Division B is strictly informational in scope, divided by topics that support Standards but are not binding.

Division C: Accepted Materials

contains all the listed Accepted Materials used in the RoofStar Guarantee Program; it is searchable by a variety of methods, each made simple by ready hyperlinks.

Division D: Standards for Roof Waterproofing Systems

Division E: Standards for Water-shedding Systems

Division F: Standards for Grade-level Waterproofing Systems

Division G: Construction Details

Division H: General Information

Each Standard is prepared by the RCABC Guarantee Corp. (RGC) Technical Committee, under the final approval of the RCABC Guarantee Corp. (RGC) Board of Directors and is republished every four months. While printable versions of each Standard are available for download by users of the RPM, the online version remains the authoritative document in all respects.