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[CCMC 06666-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 a breather-type sheathing membrane under commonly used types of exterior cladding (except stucco) and brick veneer 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
09-27-03-02-00-0- Sheathing Membrane Material StandardAlternative
09-27-03-03-00-0- Required Sheathing Membrane and InstallationAlternative

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


Product description

The product consists of 6.4-mm-thick extruded polystyrene laminated between two layers of kraft paper. The product is available in widths up to 2 438 mm and is fan-folded into various configurations from 610 mm to 1 219 mm. One bundle of the product provides a continuous length of up to 128 m.

Isometric of the product application

Figure 1. Application of the product as a sheathing material

Bundle of the product

Figure 2. Fome-Cor® Board bundle

1. Various configurations from 610 mm to 1 219 mm

Manufacturing plant

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

Product nameManufacturing plant
Glasgow, KY, US
Fome-Cor®BoardProduct 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 must be installed with the printed side facing outward and must be protected from exposure to ultraviolet (UV) radiation from the sun within 60 days of application to the wall.
  • The product must be installed in accordance with Article, Required Sheathing Membrane and Installation, of Division B of the NBC 2015 and the manufacturer's current instructions.
  • A minimum 10-mm air space must be ensured between the product and the cladding.
  • Any concealed air space exceeding 25 mm in width must contain proper fire blocking in accordance with Subsection 9.10.15., Spatial Separation Between Houses, of Division B of the NBC 2015.
  • The product must be covered with cladding that meets the material and installation requirements of the NBC 2015.
  • When the product is used as a re-siding underlayment over existing cladding:
    • all the conditions and limitations stated above apply, as the product also acts as a sheathing membrane;
    • the existing exterior walls being reclad with new cladding and the product must meet the requirements of the NBC 2015 for heat transfer, air leakage, and condensation control (see explanatory information below); and
    • the new cladding must be either securely fastened through the structure directly or attached to the existing siding if adequate rigidity and support are being provided.

 Explanatory information

The product may be used as re-siding underlayment provided it is properly installed with knowledge of the existing wall configuration and performance. The possibility of moisture accumulation within the wall construction is mainly a function of the physical properties of the additional materials being installed and their impact on the air leakage, vapour diffusion, and thermal characteristics of the existing wall. Consequently, the potential moisture accumulation resulting from the addition of materials is very specific to the existing wall construction being modified.

The product must be clearly identified with the manufacturer's name and logo, the product's brand name, and the phrase "CCMC 06666-R."

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-061653.01-15CCMC Technical Guide for Sheathing, Panel Membrane, Breather-Type

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

Prescriptive requirements
Table 1. Results of testing the performance properties of the product
Property Unit Requirement Result
Tensile strength of original sample N/mm ≥ 3.5

23.8 MD
15.9 XDTable footnote (1)

Water vapour permeance (WVP) of original sample ng/(Pa·s·m2) 170 ≤ WVP ≤ 1 400 337
Water ponding of original sample No leakage No leakage
Tensile strength after UV exposure % retention of original ≥ 90 87Table footnote (2)
Tensile strength after heat aging of UV-exposed specimens % retention of original ≥ 85 85
Water vapour permeance (WVP) of UV-exposed and heat-aged specimens ng/(Pa·s·m2) 170 ≤ WVP ≤ 2 900 447
Water ponding of UV-exposed and heat-aged specimens No leakage No leakage

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.

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From: National Research Council Canada

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