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[CCMC 06666-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 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 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 name

Fome-Cor® Board

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: 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.

  • Sheathing membrane – new construction
    • The product must be installed with the printed side facing outward and must be protected from exposure to ultraviolet radiation (UV) from the sun within 60 days after application to the wall.
    • The product must be installed in accordance with Article of Division B of the NBC 2015 and the manufacturer’s current instructions.
    • The product must be installed with a minimum 10 mm air space between the sheathing membrane 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.
  • Re-siding underlayment – retrofit
    • The product may also be used as a re-siding underlayment over existing cladding. Existing exterior walls being reclad with new siding and the product as an underlayment must be retrofitted to meet the requirements of the NBC 2015 for heat transfer, air leakage and condensation control (see Explanatory information below).
    • When the product is used as a re-siding underlayment, the product must be covered with new cladding that meets the requirements of the NBC 2015. 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.
    • When the product is used as a re-siding underlayment, it also acts as a sheathing membrane. Thus, the installation requirements for sheathing membranes outlined above also apply to re-siding underlayment installations.
  • Explanatory information
    • 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 retrofitted.
    • The product may be used as re-siding underlayment provided it is properly installed with knowledge of the existing wall configuration and performance.
    • 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 Report Holder has submitted technical documentation for the 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 original sample N/mm ≥ 3.5 26.4
Water vapour permeance original sample ng/(Pa·s·m2) 170 ≤ WVP ≤ 1 400 429
Water ponding original sample No leakage No water leakage
Tensile strength after UV exposure % ≥ 90% of original 87Table footnote (1)
Tensile strength after heat aging of UV exposed specimens % ≥ 85% of original 85
Water vapour permeance 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 water leakage

Administrative information


This evaluation is issued by the Canadian Construction Materials Centre (CCMC), a part of the Construction Research Centre at the National Research Council of Canada (NRC). The evaluation must be read in the context of the entire CCMC Registry of Product Assessments and the legislated applicable building code in effect.

The CCMC was established in 1988 on behalf of the applicable regulator (i.e., the provinces and territories) to ensure—through assessment—conformity of alternative and acceptable solutions to regional building codes as determined by the local authority having jurisdiction (AHJ) as part of the issuance of a building permit.

It is the responsibility of the local AHJs, design professionals, and specifiers to confirm that the evaluation is current and has not been withdrawn or superseded by a later issue. Please refer to the website or contact:

Canadian Construction Materials Centre
Construction Research Centre
National Research Council of Canada
1200 Montreal Road
Ottawa, Ontario, K1A 0R6
Telephone: 613-993-6189
Fax: 613-952-0268

The NRC has evaluated the material, product, system or service described herein only for those characteristics stated 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 (i.e., AHJs, design professionals and specifiers). This evaluation is only valid when the product is installed in strict compliance with the stated conditions and limitations of evaluation and the applicable local building code. In circumstances where no applicable local building permit is issued and that no confirmation of compliance ‘for use in the intended field application’ is undertaken, this evaluation is null and void in all respects. This evaluation is provided without representation, warranty, or guarantee of any kind, expressed, or implied, and the NRC provides no endorsement for any evaluated material, product, system or service described herein. The NRC accepts no responsibility whatsoever arising in any way from any and all use and reliance on the information contained in this evaluation with respect to its compliance to the referenced code(s) and standard(s). 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, 2022

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.