[CCMC evaluation requirements] CGSB 37-GP-56M-1985, Type 2a, Class C, Grade 2

From: National Research Council Canada

This document provides the material, installation, manufacturing, and labelling requirements imposed by the Canadian Construction Materials Centre (CCMC) for all evaluations based on the following:

Scope

These evaluations apply to a single layer of multi-ply, prefabricated, modified bituminous and reinforced membrane for roofing. The membrane can be fully adhered, partially attached, or loose-laid. The proponent has demonstrated that the product meets the requirements of CGSB 37-GP-56M-1985 (including Amendment No. 2, dated December 1985).

The standard classifies the membranes into two types, three classes and two grades of products:

  • Type 1 for exposed roofing application:
    1. fully adhered
    2. partially attached
  • Type 2 for covered roofing application:
    1. fully adhered
    2. partially attached
    3. loose laid
  • Class A - granule surfaced;
  • Class B - metallic surfaced; and
  • Class C - plain surfaced.
  • Grade 1 - standard service; and
  • Grade 2 - heavy duty service.

The following evaluation requirements are for a Type 2a, Class C, Grade 2 product

Material requirements

The evaluation holder must demonstrate that the product meets the following requirements:

Material requirements
Property Unit Requirement
Breaking strength Footnote (1) N ≥ 785
Ultimate elongation (at break) Footnote (1) % ≥ 8
Load strain product ≥ 14 700
Water resistance water absorption g ≤ 1.0
dimensional change Footnote (1) % shall not be greater than ± 1%
Low temperature flexibility at –10°C Pass the watertightness test
Water vapour transmission g/m2 ≤ 1.0
Lap joint strength Footnote (2) after 5 days of conditioning Pass the breaking strength test and then the watertightness test
after immersion in water at 50°C for 5 days Pass the breaking strength test and then the watertightness test
after immersion in water at 50°C for 5 days followed by 5 freeze-thaw cycles Pass the breaking strength test and then the watertightness test
Crack bridging capability (500 cycles at –10°C) No evidence of cracking or splitting or loss of adhesion

Additional Information

If stated in the Listing, the proponent has provided information related to the following:

Fire Classification of Roof Covering

The membrane was tested in accordance with the CAN/ULC S107-10, “Standard Methods of Fire Tests of Roof Coverings.”

Fire-Resistance Rating

The membrane used in the roofing assembly was tested in accordance with CAN/ULC S101-14, “Standard Method of Fire Endurance Tests of Building Construction and Materials.”

Wind Uplift Resistance of Membrane Roofing Assemblies

The membrane used in the roofing assembly was tested in accordance with CAN/CSA-A123.21-10, “Standard Test Method for the Dynamic Wind Uplift Resistance of Membrane-Roofing Systems.”

© Canadian General Standards Board. This standard is withdrawn by CGSB due to limited use and support for their revision. Therefore, the information contained therein may no longer represent the most current, reliable, and/or available information on these subjects. CGSB hereby disclaims any and all claims, representation or warranty.

Installation requirements

The CCMC requires that evaluation holders provide instructions for the installation of the product(s) that:

Manufacturing requirements

The CCMC requires that evaluation holders demonstrate that the associated production process:

Labelling requirements

The CCMC requires that evaluation holders ensure that product labels:

Additionally, the bundle, roll or package shall be suitably marked with the following information:

  • the manufacturer; and
  • the product and quantities.

Published CCMC evaluations

The following products have been evaluated to these requirements by the CCMC:

CCMC number:Manufacturer:Product name(s):
13263-LFirestone Building Products Canada SBS Cap, SBS FR Cap, SBS Premium, SBS Premium FR, SBS PolyBase

Code reference

This standard is referenced in the following codes:

National Building Code of Canada 2015

Code reference Code provision
Table 5.9.1.1.Standards Applicable to Environmental Separators and Assemblies Exposed to the Exterior
Table 9.26.2.1.-B.Roofing materials
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