Language selection


[CCMC 12981-R] CCMC Canadian code compliance evaluation

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.

Compliance opinion

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

National Building Code of Canada 2015

ID Code provision Solution type
05-04-01-02-00-0- Except as provided in Sentence ...Acceptable
09-25-03-02-00-0- Where polyethylene sheet is used to prov ...Alternative
09-36-02-10-00-0- Materials intended to provide the princi ...Acceptable

Ontario Building Code

Ruling No. 01-03-87 (12981-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 2001-10-15 (revised 2014-09-18) 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(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

Isoclad® - Air Barrier Material

Product description

This Report addresses the performance of the product as an air barrier material within the Isolofoam Group-specified “Isoclad®” air barrier system. This air barrier system has not been evaluated, but is presented in Additional Information: An air barrier material as part of an air barrier system as additional information for the convenience of building officials and designers.

The product is a Type 2, expanded polystyrene rigid insulation panel (Isoclad® CCMC 12895-L) that is plant-laminated to a vapourpermeable membrane (DRYline® HP/GuardWrap® NXT/HWHP-80A Building Wrap (CCMC 13426-R), Jumpstart Consultants, Inc.). The panels are commonly 2 438 mm × 1 219 mm, 2 743 mm × 1 219 mm or 3 048 mm ×1219 mm in size and are available in different thicknesses (minimum 25.4 mm).

Manufacturing plant

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

Product nameManufacturing plant
Sainte-Marie-de Beauce, QC, CA
Isoclad® - 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 Appendix Note A-, Air and Vapour Permeance Values, Sentence and Sentence of Division B of the NBC 2015, to be the principal plane of airtightness in an air barrier system.
  • The product must be installed in a wall assembly that includes a vapour barrier in compliance with Subsection 9.25.4., Vapour Barriers, of Division B of the NBC 2015. In cases where: i) at a specific thickness the product has a water vapour permeance less than 60 ng/(Pa∙s∙m²) or ii) another low air and water vapour permeance element has been installed in the wall assembly, Article, General (Properties and Position of Materials in the Building Envelope), of Division B of the NBC 2015 must apply depending on the location of these materials in the wall assemblies.
  • 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;
    • with a minimum 10-mm air space between “Isoclad® - Air Barrier Material” 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
    • according to the most recent update of the Isolofoam Group’s “Isoclad® Installation Guide” (examples of the installation details are presented as additional information in Additional Information: An air barrier material as part of an air barrier system).
  • It should be noted that a concealed air space exceeding 25 mm in width must contain proper fire blocks, 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 12981-R.”

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-072709.02-15DCCMC 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.

Performance requirements
Table 1. Results of testing the product to the CCMC Technical Guide for air barrier materials
Test Unit Requirement Result
Five 1 m2 membrane specimens tested and measured for air permeance at a minimum of six air pressure differentials (ΔP) between 0 and 300 Pa (unconditioned specimens) L/(s·m2) Air leakage rate at 75 Pa ΔP (based on linear regression of 30 data points) ≤ 0.02 L/(s·m2) 0.004
Five 1 m2 membrane specimens tested and measured for air permeance at a minimum of six air pressure differentials (ΔP) between 0 and 300 Pa (conditioned specimens) L/(s·m2) Where less than 0.01 L/(s·m2) for unconditioned specimens, the air leakage rate for conditioned specimens must not increase by more than 0.001 L/(s·m2) at 75 Pa pressure difference. 0.0008 (Pass)
Water vapour transmission with NBC-required directionality at a thickness of 25.4 mmTable footnote (1) Table footnote (2) ng/(Pa∙s∙m2) Where less than 60 ng/(Pa∙s∙m²), the location of the product installation is restricted by the requirements listed in Article of Division B of the NBC 2015. 105 ng/(Pa∙s∙m2)


 Additional information: An air barrier material as part of an air barrier system

An air barrier material as part of an air barrier system

The CCMC has not evaluated the performance of the “Isoclad®” air barrier system in conformance with Article of Division B of the NBC 2015. 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 Isolofoam Group’s “Isoclad® Installation Guide” should satisfy the requirements for continuity of the air barrier system in Articles, Required Barrier to Air Leakage, and, Continuity of the Air Barrier System, of Division B of the NBC 2015.


Authorities having jurisdiction (AHJ) 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 be- tween 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 in which 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 of Division B of the NBC 2015 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 “Isoclad®” material is applied over the structural framing complying with the NBC 2015. 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. The Isolofoam Group’s “Isoclad® Installation Guide” 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. “Isoclad®” material as the principal plane of airtightness;
  2. accessories including: sealants and the 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 the Isolofoam Group’s “Isoclad® Installation Guide”;
  3. durable, 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 the Isolofoam Group's “Isoclad® Installation Guide” 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 the Isolofoam Group’s “Isoclad® Installation Guide.”

Exterior wall axonometric
Figure 1. Exterior wall
  1. CCMC-evaluated sheathing tape
Exterior wall section
Figure 2. Exterior wall
  1. ceiling air/vapour barrier
  2. air barrier strip
  3. CCMC-evaluated sheathing tape
  4. “Isoclad®
  5. CCMC-evaluated sheathing tape

All joints between the panels must be sealed with the CCMC-evaluated sheathing tape. To maintain continuity, the wall membrane must be extended over the top plates and taped to the ceiling membrane.

Foundation/exterior wall detail, axonometric
Figure 3. Foundation/exterior wall detail
  1. sill plate gasket
  2. CCMC-evaluated sheathing tape
  3. flashing
  4. seal the joint between the “Isoclad®” board and the flashing
  5. the flashing must be sealed to the foundation wall
Foundation/exterior wall detail
Figure 4. Foundation/exterior wall detail
  1. sill plate gasket
  2. flashing
  3. seal the joint between the “Isoclad®” board and the flashing
  4. the flashing must be sealed on the foundation wall

The foundation wall forms part of the air barrier system; the proposed membrane must therefore be sealed to the foundation wall to maintain continuity. The sealants used must be compatible with DRYline® HP / GuardWrap® NXT / HWHP-80A Building Wrap® . Silicone-based sealants must not be used. To maintain continuity to prevent water infiltration, a seal at the sill must be provided to direct water towards the exterior.

Continuity at window penetrations axonometric
Figure 5. Continuity at window penetrations
  1. window flashing tape
  2. sheathing tape

The continuity of the proposed membrane must be maintained by sealing the membrane to windows and doors. This may be accomplished by adding a membrane to the frame around the window openings and then sealing it to the windows with either a foam sealant or elastomeric sealant/backer rod. These sealants must be compatible with the surfaces being joined.

Exterior electrical junction boxes and receptacles
Figure 6. Exterior electrical junction boxes and receptacles
  1. “Isoclad®
  2. airtight plastic electrical box
  3. snap-on cover plate

All exterior electrical boxes and receptacles that penetrate the proposed air barrier material must be airtight boxes. Otherwise, electrical boxes must be wrapped and sealed to the proposed air barrier material to maintain continuity at these locations.

Detail for sealant at penetrations
Figure 7. Sealing at penetrations through exterior wall
  1. seal the gap around penetrations
  2. cut “Isoclad®” to fit around penetrations

When a pipe, duct or other element penetrates the exterior wall and the proposed air barrier material, it must be sealed. Use sealant or the CCMC-evaluated sheathing tape, whichever is more appropriate for the element being sealed to.

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, 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.

Page details

From: National Research Council Canada

Date modified: