[CCMC 14173-R] CCMC Canadian code compliance evaluation

From: National Research Council Canada

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Code compliance opinion

National Building Code of Canada 2015

ID Code provision Solution type
09-03-03-02-00-0-009.3.3.2. Galvanized Sheet SteelAcceptable
09-26-01-02-00-0-009.26.1.2.(1) Roofs shall be protected with roofing, i ...Acceptable
09-26-02-00-00-0-009.26.2. Roofing MaterialsAlternative
09-26-13-01-00-0-009.26.13.1. ThicknessAcceptable

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 names

  • Vicwest True Nature Cedar CreekTM Shake
  • Vicwest True Nature North RidgeTM Slate

Product description

Vicwest's True Nature Cedar Creek™ Shake and True Nature North Ridge™ Slate are sheet steel roofing systems consisting of a basic panel that is pressure-formed from 0.38 mm thick Galvalume® and installed directly on sloped roofs with a minimum slope of 1 in 4 that require a roofing underlay. The sheet steel is coated with a 10,000 series polyvinylidene fluoride (PVDF) paint system to resist weathering and rust.

The products have a nominal measurement of 1 287 mm x 345 mm. The butt edge is bent in on itself to form a lower locking mechanism. The top edge is formed to make a clip to receive the lower edge of the panel. The top edge also has a lip to receive the fasteners. The side edges have interlocking overlap to allow for fitting between adjacent panels. Panels are to be installed working left to right.

The panels emulate the look of wood shake and stone slate. All systems include accessory strips for hip and ridge cap, and associated flashings. The panels come in a variety of colours.

Panels of the products and typical installation details are shown in Figure 1, Figure 2, Figure 3 and Figure 4. All products are installed without battens.

True Nature North Ridge Slate panel

Figure 1. Vicwest's True Nature North Ridge™ Slate panel


 

True Nature Cedar Creek Shake panel

Figure 2. Vicwest's True Nature Cedar Creek™ Shake panel


 

Figure 3. Typical installation details for Vicwest's True Nature metal roofing


 

Fastener installation details for True Nature metal roofing tile

Figure 4. Typical fastener installation details for Vicwest's True Nature metal roofing tile

Manufacturing plant

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

Product namesManufacturing plant
Stratford, ON, CA
Vicwest True Nature Cedar CreekTM ShakeProduct evaluated by the CCMC
Vicwest True Nature North RidgeTM SlateProduct 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 CCMC's compliance opinion is bound by Vicwest's True Nature Cedar Creek™ Shake and True Nature North Ridge™ Slate being used in accordance with the conditions and limitations set out below.

  • The panels must be installed on roofs having a minimum slope of 1 in 4.
  • The products are limited to installations where no fire-resistance rating is required.
  • The panels must be installed over solid sheathing in compliance with the requirements of Subsection 9.23.16., Roof Sheathing, of Division B of the NBC 2015.
  • Flashing must be installed in compliance with the requirements of Subsection 9.26.4., Flashing at Intersections, of Division B of the NBC 2015.
  • The panels must be installed with eave protection as indicated in Subsection 9.26.5., Eave Protection for Shingles and Shakes, of Division B of the NBC 2015.
  • The panels must be installed with an underlay complying with the requirements of Subsection 9.26.6., Underlay beneath Shingles, of Division B of the NBC 2015 and as per manufacturer specifications. For slopes between 1 in 3 and 1 in 4, the underlayment must be a self-adhered membrane specified by the manufacturer.
  • Only the panels with PVDF paint coatings are part of this evaluation. Panels with any other type of coating have not been evaluated by the CCMC.
  • Only fasteners and accessories supplied by the manufacturer may be used in conjunction with the panels. The fasteners and accessories must be compatible with the base metal of the panels.
  • Fastener spacing on the panels must be no more than 195 mm on centre (o.c.), using the pre-drilled holes along the fastening tab on the top.
  • The Vicwest True Nature Cedar Creek™ Shake and True Nature North Ridge™ Slate metal roofing tiles must be installed by trained installers in strict conformance to the manufacturer's current instructions issued as of May 2021.
  • The roofing systems are for use in locations where access is limited for maintenance or repair purposes. When access to the roof is needed, temporary walkways or roof boards are recommended to avoid any permanent damage to the panels.
  • In case of any discrepancies between the conditions and limitations of this CCMC evaluation and the manufacturer's installation requirements, the conditions and limitations of the CCMC evaluation shall govern.
  • The products or their packaging must be clearly identified with "CCMC 14173-R."

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-074113-15ACCMC Technical Guide for Metal Roof Panels
Material requirements
Table 1. Physical properties of the products
Property Requirement Test method Result
Thickness of base metal (mm) ≥  0.33 - 0.44
Coating quality Smooth and uniform, free of pinholes,
cracks, blisters and flaking		 CAN/CGSB-93.3 Pass
Total dry film thickness (µm) ≥ 25 ASTM D 7091 27
Dry film hardness No rupture ASTM D 3363 Pass
Coating adhesion –dry No removal of film ASTM D 3359Table footnote (1) Pass
Coating adhesion – wet No removal of film ASTM D 3359Table footnote (1) Pass
Impact resistance No removal of film - Pass
Salt spray resistance ≥ 7 ratingTable footnote (2) ASTM B 117Table footnote (3) 7
Weathering (accelerated) No sign of any color change,
chalking, or cracking		 ASTM G 155Table footnote (4) Pass
Abrasion resistance ≥ 40 ASTM D 968 47
Acid resistance No loss of integrity or
appreciable change		 - Pass
Flexibility No flaking or cracking ASTM D 522, Test method B Pass
Performance requirements

Traffic load

Results of traffic load testing
Property Requirement Result
Traffic load of 900 N No signs of any plastic deformation or permanent openings at the lap that would adversely affect the function of the roofing system Pass

Wind uplift

Table 2. Wind uplift test results
Pressure (kPa) Time (s) Requirement ResultTable 3 footnote (1)
-0.5 10 No evidence of deformation, permanent damage or failure Pass
-1.0 10 Pass
-1.4 10 Pass
-1.9 10 Pass
-2.9 10 Pass
-3.8 10 Pass
-4.3 10 Pass
-4.8 10 Pass

Dynamic pressure water infiltration

Table 3. Results of testing of dynamic pressure water infiltration
Wind speed (km/h) Simulated rainfall (L/m2·min) Time (min) Requirement ResultTable 4 footnote (1)
80 3.4 5 No leakage or damage Pass
110 3.4 5 Pass
140 3.4 5 Pass
170 3.4 5 Pass

Administrative information

Disclaimer

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.

Language

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In the case of any discrepancy between the English and French version of this document, the English version shall prevail.

Copyright

© 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.

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Code compliance as an acceptable solution

Code Compliance via Acceptable Solutions

If a building design (e.g. material, component, assembly or system) can be shown to meet all provisions of the applicable acceptable solutions in Division B (e.g. it complies with the applicable provisions of a referenced standard), it is deemed to have satisfied the objectives and functional statements linked to those provisions and thus to have complied with that part of the Code.

National Building Code of Canada, Sentence A-1.2.1.1.(1)(a)

The CCMC has determined that compliance with this provision of the Code has been demonstrated as an Acceptable Solution. The evaluation report provides a summary of the basis of CCMC's compliance opinion.

CCMC's code compliance opinions

All CCMC evaluation reports are opinions of code compliance established in accordance with the National Building Code of Canada, Subsection 1.2.1. "Compliance with this Code," which requires compliance to be achieved by:

  • complying with the applicable acceptable solutions in Division B, or
  • using an alternative solution that will achieve at least the minimum level of performance required by Division B in the areas defined by the objective and functional statements attributed to the applicable acceptable solutions.

The CCMC assesses compliance with Canadian building, energy and safety codes, and is trusted by over 6,000 regulators across Canada.

Code compliance as an alternative solution

Code Compliance via Alternative Solutions

Where a design differs from the acceptable solutions in Division B, then it should be treated as an "alternative solution." A proponent of an alternative solution must demonstrate that the alternative solution addresses the same issues as the applicable acceptable solutions in Division B and their attributed objectives and functional statements. However, because the objectives and functional statements are entirely qualitative, demonstrating compliance with them in isolation is not possible. Therefore, Clause 1.2.1.1.(1)(b) identifies the principle that Division B establishes the quantitative performance targets that alternative solutions must meet. In many cases, these targets are not defined very precisely by the acceptable solutions [...] Nevertheless, Clause 1.2.1.1.(1)(b) makes it clear that an effort must be made to demonstrate that an alternative solution will perform as well as a design that would satisfy the applicable acceptable solutions in Division B—not “well enough” but “as well as.”

National Building Code of Canada, Sentence A-1.2.1.1.(1)(b)

The CCMC has determined that compliance with this provision of the Code has been demonstrated as an Alternative Solution. The evaluation report provides a summary of the basis of CCMC's compliance opinion.

CCMC's code compliance opinions

All CCMC evaluation reports are opinions of code compliance established in accordance with the National Building Code of Canada, Subsection 1.2.1. "Compliance with this Code," which requires compliance to be achieved by:

  • complying with the applicable acceptable solutions in Division B, or
  • using an alternative solution that will achieve at least the minimum level of performance required by Division B in the areas defined by the objective and functional statements attributed to the applicable acceptable solutions.

The CCMC assesses compliance with Canadian building, energy and safety codes, and is trusted by over 6,000 regulators across Canada.

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