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[CCMC 13508-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 exterior siding for buildings of combustible construction 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
09-27-02-00-00-0-009.27.2. Required Protection from PrecipitationAlternative
09-27-03-00-00-0-009.27.3. Second Plane of ProtectionAlternative
09-27-05-00-00-0-009.27.5. Attachment of CladdingAlternative
09-27-12-02-00-0- AttachmentAlternative

Ontario Building Code

Ruling No. 10-10-247 (13508-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 2010-06-23 (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

Cedar Impressions – Polypropylene Siding Products

Product description

The wall siding panels and corners are made of injection-moulded, press-formed polypropylene. They are fastened to the building structure through pre-punched nailing slots located along the top edge of the panel, which are concealed after the upper panel is installed.

Manufacturing plant

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

Product nameManufacturing plant
McPherson, KS, US
Cedar Impressions – Polypropylene Siding ProductsProduct 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 products are limited to use as exterior siding for the buildings falling within the scope of Part 9, Housing and Small Buildings, of Division B of the NBC 2015.
  • When installed, all the building elements relevant to the product must comply with the requirements of the NBC 2015.
  • The siding panels must be installed on furring to provide a second plane of protection that consists of a continuous, clear, uninterrupted air space not less than 10 mm outboard of the sheathing membrane.
  • The furring must be installed over the sheathing membrane.
  • The system requires flashing at appropriate locations in order for water to drain to the outside.
  • Furring for the attachment of the cladding must be no less than 19 mm × 38 mm, must be securely nailed to the sheathing or framing, and must be spaced not more than 600 mm on centre (o.c.).
  • The product must be clearly identified with the phrase “CCMC 13508-R.”

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-074633.04A-15BCCMC Technical Guide for Polypropylene Siding

The evaluation 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.

Material requirements

Physical properties

Table 1. Results of testing the physical properties of the product
Property Unit Requirement Result
Impact resistance N·m ≥ 3.95 Pass
Weathering Not applicable Siding must be free of any structural changes or visible surface changes such as peeling, chipping, cracking, flaking or pitting. Pass


Performance requirements

Performance test results

Table 2. Results of performance testing
Property Requirement ResultTable footnote (1)Table footnote (2)Table footnote (3)
Deformation (sustained pressure)Table footnote (1) No damage observed after a sustained pressure for 1 hour at a maximum pressure of ±1 000 Pa Q50 < 1.00 kPa
Repeated positive and negative pressure test (cyclic pressure)Table footnote (1) No damage observed after 2 000 cycles reversing from positive to negative pressures at a maximum of ±1 460 Pa Q50 < 1.00 kPa
Safety test (gust loads)Table footnote (1) No damage observed after a maximum applied pressure of 2 180 Pa for 3 seconds Q50 < 1.00 kPa
Surface burning characteristicsTable footnote (4) – flame-spread Declare 75
Surface burning characteristicsTable footnote (4) – smoke-developed Declare 445


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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