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[CCMC 14032-R] CCMC Canadian code compliance evaluation

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

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Compliance opinion

It is the opinion of the Canadian Construction Materials Centre that the evaluated product, when used as an air barrier material in accordance with the conditions and limitations stated in this evaluation, complies with the following code:

National Building Code of Canada 2010

ID Code provision Solution type
05-04-01-02-01-0-005.4.1.2.(1) Except as provided in Sentence 5.4.1.2.(2), ...Alternative
09-25-03-02-00-0-009.25.3.2.(1) Air barrier systems shall possess the ch ...Alternative

The above opinion(s) is/are 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 name

SR.Air™ – Air Barrier Material

Product description

This Report addresses the performance of the product as an air barrier material within the Styro Rail Inc. air barrier system. This air barrier system has not been evaluated, but is presented in Appendix A as additional information for the convenience of building officials and designers.

The product is a preformed, moulded, expanded polystyrene rigid insulation panel (see “Polystyrène Type 2,” CCMC 13271-L) made by Styro Rail Inc., which is laminated to a sheathing membrane (see “REX™ Wrap Fortis,” CCMC 13618-R). The membrane consists of two layers of non-woven polyester and a polyethylene blown film with a polyester/polyethylene mesh, which are bonded together with a hot melt adhesive, made by AdChem. The panels are available in sizes of 1 220 mm × 2 438 mm or 1 220 mm × 2 743 mm.

Manufacturing plant

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

Product nameManufacturing plant
La Pêche, QC, CA
SR.Air™ – Air Barrier MaterialProduct 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’s material has demonstrated a sufficiently low air permeance equivalent to the materials outlined in Sentence 5.4.1.2.(1) and Appendix Note A-9.25.5.1.(1), Air and Vapour Permeance Values, of Division B of the NBC 2010, to be the principal plane of airtightness in an air barrier system.
  • When the material is installed as part of the airtight element of the designated air barrier system, the vapour barrier must comply with Sentences 9.25.4.2.(1), (2), (5) and (6), Vapour Barrier Materials, of Division B of the NBC 2010. In cases where another low water vapour permeance element has been installed in the wall assembly, Sentences 9.25.4.2.(3) and (4) apply.
  • A conforming installation must be:
    • installed with the printed side facing outward and protected from exposure to ultraviolet (UV) radiation from the sun within 60 days;
    • 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 (e.g., deemed by the CCMC or deemed by building officials based on past cladding performance); and
    • installed according to Styro Rail Inc.’s installation manual’s most recent update (examples of the installation details are presented as additional information in Appendix A).
  • It should be noted that 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 2010.
  • CCMC-evaluated sheathing tape must be used to seal all joints.

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-072709.02-10ACCMC Technical Guide for Air Barrier Materials

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.

The durability assessment of the product is covered under CCMC 13271-L and CCMC 13618-R.

Performance requirements
Table 1. Results of testing the product to the CCMC technical guide for air barrier materials
Test Requirement Result
Five 1-m2 specimens tested and measured for air permeance at a minimum of six air pressure differentials between 0 and 250 Pa Air leakage rate at 75 Pa (based on linear regression of 30 data points) ≤ 0.02 L/(s·m2) 0.018 L/(s·m2)
Water vapour permeance at 25-mm (1-in.) thickness Report value 83.9 ng/(Pa∙s∙m2)
Appendix A - Additional information  

An air barrier material as part of an air barrier system

The CCMC has not evaluated the performance of the Styro Rail Inc. air barrier system in respect of its conformance to Article 9.25.3.2., Air Barrier System Properties, of Division B of the NBC 2010. However, the CCMC’s opinion is that an air barrier system using this material and installed in conformance with the details outlined below and in Styro Rail Inc.’s installation manual should satisfy the requirements for continuity of the air barrier system in Articles 9.25.3.1., Required Barrier to Air Leakage, and 9.25.3.3., Continuity of the Air Barrier System, of Division B of the NBC 2010.

Discussion

Authorities having jurisdiction (AHJs) should be aware that this system differs from the typical air barrier approach, which uses a flexible membrane as the principal plane of airtightness. In the typical approach, the membrane (i.e., polyethylene sheet) is normally sandwiched between two other materials so that it is not required to resist, on its own, the full force of indoor/outdoor pressure differences induced by stack effect, mechanical systems and, most importantly, wind.

In a system where a composite of insulation board and membrane is applied to the outer surface of the wall, such as the proposed air barrier system, that composite board must have adequate strength and attachment to resist the anticipated wind pressures. The CCMC’s evaluation of the proposed material does not include the evaluation of this strength or the strength of the continuity details. The AHJ must therefore determine whether the proposed air barrier system, described herein, meets the intent of Sentence 9.25.3.2.(1) of Division B of the NBC 2010 as being an effective barrier for the proposed construction in the proposed geographical/climate area. For example, based on their experience, the AHJ may deem the proposed air barrier system adequate for buildings in urban areas, sheltered sites or areas of low wind, but inadequate in areas of high wind and exposed sites in rural or coastal areas.

An air barrier system checklist for the AHJ to consider is the following:

An air barrier system must:

  1. have an acceptable low air leakage rate;
  2. be continuous;
  3. be durable;
  4. have sufficient strength to resist the anticipated air pressure load; and
  5. be buildable in the field.

Installation details

The SR.Air – Air Barrier Material is applied over the structural framing complying with the NBC 2010. It does not contribute to an air barrier system until it is joined to the other components that make up the air barrier system of the building. Styro Rail Inc.’s installation manual outlines how the proposed material must be joined to the foundation wall, windows and doors, penetrations in the wall and the ceiling air barrier, thus forming the system.

A successful air barrier system installation is predicated on sequencing during construction. Coordination is required during erection of framing and after completion of the air barrier system to ensure that no other trade breaches the integrity of the installed air barrier system.

The proposed air barrier system is defined as possessing the following features:

  1. SR.Air – Air Barrier Material as the principal plane of airtightness;
  2. accessories, including sealants and CCMC-evaluated sheathing tape to maintain continuity at junctions with penetrations in the wall assembly (i.e., windows, doors, pipes, ducts, electrical outlets, etc.) and in accordance with continuity details in Styro Rail Inc.’s installation manual;
  3. durability, meeting UV- and heat-aging requirements;
  4. exterior sheathing with specified fasteners and fastening schedule of the product for structural support against anticipated pressure loads; and
  5. buildable in the field by builders following Styro Rail Inc.’s installation manual and reviewed by building officials.

The figures below outline typical construction details of an air barrier system. For specific information on the product’s construction and installation details, refer to Styro Rail Inc.’s installation manual.

Roof/exterior wall and exterior wall/foundation details.
Figure 1. Roof/exterior wall and exterior wall/foundation details
  1. sheathing tape
  2. SR.Air board
  3. air barrier strip
  4. sheathing tape for sealing the joint between the product and the flashing
  5. flashing
  6. seal
  7. sill plate gasket
Continuity at window penetrations.
Figure 2. Continuity at window penetrations
  1. sheathing tape
  2. SR.Air board
  3. window flashing tape
  4. sheathing tape for sealing the joint between the product and the flashing
  5. flashing
Sealing at penetrations through exterior wall.
Figure 3. Sealing at penetrations through exterior wall
  1. sheathing tape
  2. sealing of the gap around penetrations
  3. cutting of the product to fit around penetrations
Exterior electrical junction boxes and receptacles.
Figure 4. Exterior electrical junction boxes and receptacles
  1. SR.Air board
  2. airtight plastic electrical box
  3. snap-on cover plate

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.

Disclaimer

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.

Language

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.

Copyright

© His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2024

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.

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From: National Research Council Canada

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