[CCMC 14450-R] CCMC Canadian code compliance evaluation

From: National Research Council Canada

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

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Code compliance opinion

It is the opinion of the Canadian Construction Materials Centre that the evaluated product, when used as a high-density, polyurethane plastic cladding system in new and retrofit constructions falling under Part 9, Housing and Small Buildings, in accordance with the conditions and limitations stated in this evaluation, complies with the following Canadian codes:

National Building Code of Canada 2015

Code provision Solution type Where cladding materials other than thos ...Acceptable
9.27.12. Vinyl SidingAlternative
9.27.2. Required Protection from PrecipitationAcceptable Except as provided in Sentence ...Alternative
9.27.3. Second Plane of ProtectionAcceptable

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 which forms the basis of this evaluation has been included.

  Product information

Product name


Product description

The product is an exterior cladding system consisting of high-density polyurethane plastic panels that are either injection- or compression-moulded. The panels are profiled along the top- and right-side edges such that the horizontal and vertical joints are shiplapped. The exterior face of the panels are embossed to provide a masonry-like (natural stone or brick) pattern. The panels are available in different colours simulating natural stone.

installation of the cladding panel using mechanical fastener
Figure 1. NextStoneTM plastic cladding panel system

Manufacturing plants

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

  • Dongguan City, China

  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 cladding system is intended to be used over concrete, masonry, and plywood or oriented strandboard (OSB) sheathing installed over wood framing.
  • The cladding must not be used as an exterior wall covering in buildings that are required to be of noncombustible construction, or in buildings in which the exterior cladding is required to be noncombustible, in accordance with the NBC 2015.
  • Fasteners for the cladding must be corrosion-resistant, compatible with the cladding material, and positioned to permit expansion and contraction due to temperature changes. Use 62 mm (2 1/2 in.) No. 8 corrosion-resistant screws spaced at 406 mm (16 in.) on centre (o.c.).
  • The 19-mm air space that is created by furring incorporated behind the “NextstoneTM” cladding must remain unobstructed to form a clear drainage layer behind the cladding, and meet the NBC provision for low-permeance material as per Sentence, Position of Low Permeance Materials, of Division B of the NBC 2015.
  • The cladding must be installed in accordance with the manufacturer’s written installation guide (see NextStone™ Installation Guides).
  • The cladding must be installed with a suitable flashing that will drain water to the exterior and protect the exposed top edge of the cladding. Installed flashing must be in accordance with the requirements of Subsection, Flashing Materials of Division B of the NBC 2015.
  • At least one layer of sheathing membrane conforming to Article, Required Sheathing, of Division B of the NBC 2015, must be applied beneath the cladding.
  • A clearance of not less than 200 mm shall be provided between finished ground and cladding.
  • A clearance of not less than 50 mm shall be provided between a roof surface and cladding.
  • Conditions and limitations of this evaluation report shall supersede in case there are discrepancies between this evaluation report and the manufacturer’s written installation guide or manual.
  • This Evaluation Report is applicable only to products identified on the packaging with the phrase “CCMC 14450-R.”

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-074640-15CCMC Technical Guide for High Density Polyurethane Cladding

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

Prescriptive requirements

Cladding material characteristics

Test results for cladding material characteristics
Property Unit Requirement Results
DensityTable footnote (1) kg/m3 > 100 161
Tensile modulus MPa Report value 91
Compressive strength at 10% deformation MPa ≥ 1.0 1.9
Tensile strength at yield MPa Report value 2.5
Tensile strength at yield after ultraviolet (UV) resistance test % 80% of original value 115
Coefficient of linear expansion cm/cm/°C < 0.000081 0.000059
Flexural modulus MPa Report vaue 88
Flexural strength MPa ≥ 1 2.5
Loss of flexural strength % < 25 9.3
Abrasion resistance - No cracking, checking, or loss of finish at 100L of sand Pass
Water absorption % < 1% or 0.6 mg/cm2 (whichever is smaller) 0.4
Hardness of panel - Report value 325
Hardness after acid rain resistance test % 80% of original value 103
Loss of panel hardness % > 80 93

Dimensional tolerance

Test results for dimensional tolerance
Property Unit Requirement Result
Length and width mm ±3 Pass
Thickness mm ±1.6 Pass
Squareness mm ±4.0 Pass
Warpage mm 1:400 Pass
Slew mm/m ≤ 1.3 of length Pass
Edge straightness mm/m ≤ 1.3 of length and width Pass
Performance requirements

Cladding performance

Test results for cladding performance
Property Unit Requirement Result
Impact resistance - The cladding system shall be capable of withstanding the applied impact loads without deterioration in the performance or safety of the system. Pass
Acid rain resistance - The surface shall not have any defects and/or occurrences of new voids. Pass
Fastener pull through N ≥400 443Table footnote (1)
Wind load resistance - The cladding system shall be capable of resisting and transmitting to its points of support the positive and negative forces that are generated by the design wind loads, without any fracture or permanent deformation of the surfaces resulting from such design wind loads. Pass at Q50 ≤ 0.85 kPa
(non-post-disaster buildings)Table footnote (2)Table footnote (3)Table footnote (4)
Durability - The durability of the cladding is assessed by observing changes in appearance (e.g., cracking, crazing) and by measuring the loss of flexural strength. Pass
Accelerated weathering resistance - No visual surface or physical change, such as cracking, flaking or other deleterious effects after 2 000 hours of UV exposure. Pass


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.


© 2021 Her Majesty the Queen in Right of Canada, as represented by the National Research Council of Canada.

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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