[CCMC evaluation requirements] CSA A123.22-08, Type II

From: National Research Council Canada

This document provides a summary of the minimum requirements imposed by the Canadian Construction Materials Centre (CCMC) for all evaluations based on the below criteria document. Additional requirements may be imposed by the CCMC when necessary for a particular evaluation, and are detailed in the individual evaluation.

Criteria document


These evaluations apply to polymer modified bituminous sheet materials intended for use as underlayment on roof eaves, valleys, or both, to prevent water leakage for shingle, tile and/or metal roofs from water back-up due to ice dams. These underlayment sheets have a sticky adhesive layer which is exposed by removing a protective sheet. The membranes can be internally or surface-reinforced to provide mechanical strength. The top surface is suitable to work on during the application of the roofing.

The standard describes two classifications of membranes, which must be supplied in rolls in the following types:

  • Type I - Standard ice dam underlayment; or
  • Type II - High-temperature ice dam underlayment.

The following evaluation criteria is for Type II products

Material requirements

The evaluation holder must demonstrate that the product meets the following requirements (additional requirements may be imposed by the CCMC when necessary, and are detailed in the individual evaluation):

Material requirements
Property Unit Requirement
Thickness mm ≥ 1.0
Maximum load (longitudinal and transverse) kN/m ≥ 4.4
Elongation at break of modified bitumen portion % ≥ 10
Adhesion to plywood at 4°C kgf/30.5 cm ≥ 0.92
Adhesion to plywood at 23°C kgf/30.5 cm ≥ 5.44
Thermal stability (45° angle for 14 days at 95°C) mm ≤ 3
Flexibility temperature °C ≤ –29 (no signs of cracking)
Tear resistance (longitudinal and transverse) N ≥ 89
Moisture vapour permeance ng/(Pa·s·m2) ≤ 5.7
Sealability around nail Dry (no water is presented)
Waterproof integrity after low temperature flexibility Dry (no water is presented)
Waterproof integrity of lap seam Dry (no water is presented)
Slip resistance Greater than asphalt saturated felt when tested under the same conditions of temperature and wetness
Unrolling property The underlayment sheet shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at material temperatures between 4.4°C and 60°C.

© CSA Group. This information is excerpted from the referenced standard published by CSA Group. The full version of the standard should be referenced, and can be obtained from CSA Group.

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, at a minimum, demonstrate that the associated production process:

Additionally, the rolls must be securely wrapped or banded in a substantial manner to prevent shifting of material and to permit normal handling.

Labelling requirements

The CCMC requires that evaluation holders ensure that product labels:

Additionally, each package must be plainly marked with:

  • the manufacturer’s name
  • brand name
  • area of the roll
  • the CSA designation

Classification information

Products falling within the scope of this document are commonly classified by:


  • 07 50 00 Membrane Roofing
  • 07 52 00 Modified Bituminous Membrane Roofing

Published CCMC evaluations

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

CCMC number:Manufacturer:Product name(s):
13671-LGCP Applied Technologies Grace Ice and Water Shield HT
14048-LMFM Building Products Corp. Ultra HT Wind and Water Seal

Code references

National Building Code of Canada 2015

Code references Code provision
Table Roofing materials
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