Language selection


[CCMC 12264-R] CCMC Canadian code compliance evaluation

From: National Research Council Canada

In most jurisdictions this document is sufficient evidence for approval by Canadian authorities.

Learn more about CCMC recognition Look for the trusted CCMC mark on products to verify compliance.

Code compliance opinion

It is the opinion of the Canadian Construction Materials Centre that the evaluated products, when used as a breather-type sheathing membrane in accordance with the conditions and limitations stated in this evaluation, comply with the following code:

National Building Code of Canada 2015

ID Code provision Solution type
09-27-03-02-00-0- Sheathing Membrane Material StandardAlternative

Ontario Building Code

Ruling No. 95-07-26 (12264-R) authorizing the use of this product in Ontario, subject to the terms and conditions contained in the Ruling, was made by the Minister of Municipal Affairs and Housing on 1995-09-21 (revised 2017-01-30) pursuant to s.29 of the Building Code Act, 1992 (see Ruling for terms and conditions). This Ruling is subject to periodic revisions and updates.

The above opinion is based on the evaluation by the CCMC of technical evidence provided by the evaluation holder, and is bound by the stated conditions and limitations. For the benefit of the user, a summary of the technical information that forms the basis of this evaluation has been included.

Product information

Product names

  • Air-Gard®
  • Weathermate™

Product description

The product consists of a micro-perforated woven fabric made of high-density polyethylene that is coated with a white-pigmented low-density polyethylene on one side and a natural, non-pigmented low-density polyethylene on the other side. The product resists the passage of water, but permits the passage of water vapour.

The product is 0.25 mm thick and is available in rolls in widths ranging from 0.94 m to 2.82 m and in lengths ranging from 33.8 m to 59.4 m. The colour of the product is white.

The rolled material is applied over exterior sheathing material so that it forms a continuous envelope around the entire building.

Product installation over exterior sheathing material, around the entire building.

Figure 1. Installation of the product

Manufacturing plant

This evaluation is valid only for products produced at the following plant:

Product namesManufacturing plant
North Bay, ON, CA
Air-Gard®Product evaluated by the CCMC
Weathermate™Product evaluated by the CCMC

Product evaluated by the CCMC Indicates that the product from this manufacturing facility has been evaluated by the CCMC

  Conditions and limitations

The CCMC’s compliance opinion is bound by this product being used in accordance with the conditions and limitations set out below.

  • The product can be used as a breather-type sheathing membrane under commonly used types of exterior cladding to reduce the risk of water infiltration. The main purpose is to create a continuous envelope around the occupied areas of residential or light commercial construction. Such continuity is achieved by overlapping or sealing the product either to itself, using the CCMC-evaluated contractor sheathing tape, or to other construction materials using an acoustical sealant.
  • A conforming installation must be:
    • installed with the printed side facing outward;
    • protected from exposure to ultraviolet (UV) radiation from the sun within 60 days;
    • installed according to Article, Required Sheathing Membrane and Installation, of Division B of the NBC 2015 and the manufacturer’s current instructions;
    • installed with a minimum 10-mm air space between the sheathing membrane and the cladding, unless the cladding has been deemed to not require an air space (i.e., deemed by the CCMC or by building officials based on past cladding performance);
    • installed with the material overlapping 100 mm to 150 mm at vertical joints, and 100 mm at horizontal joints; and
    • installed with joints taped and sealed around both window and door openings.
  • A concealed air space exceeding 25 mm in width must contain proper fire blocking in accordance with Subsection 9.10.16., Fire Blocks, of Division B of the NBC 2015.
  • The product must be clearly identified with the phrase “CCMC 12264-R.”

  Technical information

This evaluation is based on demonstrated conformance with the following criteria:

Evaluation requirements
Criteria number Criteria name
CCMC-TG-072510.03-15CCMC Technical Guide for Sheathing Membrane, Breather Type

The Report Holder has submitted technical documentation for the CCMC’s evaluation. Testing was conducted at laboratories recognized by the CCMC. The corresponding technical evidence for this product is summarized below.

Performance requirements
Table 1. Results from testing the product to the CCMC’s technical guide
Property Requirements Results
Sheet width Tolerance: –6 mm of specified width Pass
Tensile strength (N/mm) 3.5 7.2
Water vapour permeance (ng/Pa·s·m2) ≥ 170 378
Water ponding of original samples No leakage PassTable footnote (1)
Tensile strength (% retention of original) after UV exposure ≥ 90 100
Tensile strength (% retention of original) after UV and heat aging ≥ 85 101
Water vapour permeance of UV- and heat-aged sample (ng/Pa·s·m2) ≥ 170 461
Water ponding of UV- and heat-aged samples No leakage PassTable footnote (1)

Administrative information

Use of Canadian Construction Materials Centre (CCMC) assessments

This assessment must be read in the context of the entire CCMC Registry of Product Assessments, any applicable building code or by-law requirements, and/or any other regulatory requirements (for example, the Canada Consumer Product Safety Act, the Canadian Environmental Protection Act, etc.).

It is the responsibility of the user to confirm that the assessment they are using is current and has not been withdrawn or superseded by a later version on the CCMC Registry of Product Assessments.


The National Research Council of Canada (NRC) has evaluated only the characteristics of the specific product described herein. The information and opinions in this evaluation are directed to those who have the appropriate degree of experience to use and apply its contents (such as authorities having jurisdiction, design professionals and specifiers). This evaluation is valid when the product is used as part of permitted construction, respecting all conditions and limitations stated in the evaluation, and in accordance with applicable building codes and by-laws.

This evaluation is provided without representation, warranty or guarantee of any kind, expressed or implied, and the NRC provides no endorsement for any evaluated product. The NRC accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained herein or the use of any evaluated product. The NRC is not undertaking to render professional or other services on behalf of any person or entity nor to perform any duty owed by any person or entity to another person or entity.


Une version française de ce document est disponible.
In the case of any discrepancy between the English and French version of this document, the English version shall prevail.


© His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2023

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the CCMC.