[CCMC evaluation requirements] CAN/CGSB-11.5-M87

From: National Research Council Canada

This document provides a summary of the minimum requirements imposed by the Canadian Construction Materials Centre (CCMC) for all evaluations based on the below criteria document. Additional requirements may be imposed by the CCMC when necessary for a particular evaluation, and are detailed in the individual evaluation.

Criteria document

Number

CAN/CGSB-11.5-M87

Title

Hardboard, Precoated, Factory Finished, for Exterior Cladding

Document

Standard

Publisher

Canadian General Standards Board

Scope

These evaluations apply to hardboard pre-coated by priming, staining, pre-finishing or film lamination for exterior cladding. Products evaluated demonstrate that they meet the requirements of CAN/CGSB-11.3-M87, “Hardboard,” for hardboard without a factory-applied finish.

Proponents provided evidence that the products manufactured at their plant are of a quality equal to or greater than the level represented by the sample tested and evaluated.

Material requirements

The evaluation holder must demonstrate that the product meets the following requirements (additional requirements may be imposed by the CCMC when necessary, and are detailed in the individual evaluation):

General performance requirements per CAN/CGSB-11.3-M87
Property	Unit	Requirement
Dimensional tolerance (length and width)	mm	0 to −3.2
Thickness	mm	See Table 3 for thickness requirements
Squareness	mm/m	Corners must not deviate by more than 1.3 from the right angle.
Physical properties	–	See Table 3
Impact resistance	mm	Minimum 350 ^{Footnote (1)}
Hardness	N	Minimum 2 600
Nail pull resistance	N	Minimum 750 ^{Footnote (2)}
Lateral nail resistance	N	Minimum 750 ^{Footnote (3)}

General performance requirements per CAN/CGSB-11.3-M87 - accelerated aging (after 6 cycles)
Property	Unit	Requirement
Residual modulus of rupture (MOR)	%	Minimum 50 ^{Footnote (4)}
Permanent swell	%	Maximum 15 ^{Footnote (4)}
Appearance	–	No serious surface or edge failure (i.e., no delamination and no disintegration)

Additional Testing for Factory-finished Products only per CAN/CGSB-11.5-M87
Property	Unit	Requirement
Coating appearance	–	The coatings must be commercially uniform in appearance with no defects due to checking, cracking, pinholing or blistering. The colour coating must be commercially uniform and provide a reasonable match with the colour specified
Specular gloss	–	The tolerance must be within ±5% of the agreed gloss, when determined with a 60° geometry on a plain sample
Durability	–	The samples are to be inspected for not more than a slight colour change, no more chalking than that represented by a No. 6 degree of chalking. There should be no checking, cracking or objectionable fibre raising
Water resistance-Water absorption	%	Maximum 14
Water resistance-Thickness swell	%	Maximum 5
Moisture content	%	3 to 9 when shipped

Notes to tables:

Footnote 1

Initial drop of 350 mm.

Return to footnote 1 referrer

Footnote 2

The specimen sizes must be 75 mm × 150 mm. Three galvanized box nails (2.87 mm in wire diameter and 6.75 mm in head diameter) must be driven into the board at intervals of not less than 25 mm. The holding fixture must consist of a plate with a centered opening, 40 mm in diameter, with a testing speed of 3 mm/min to 4 mm/min.

Return to footnote 2 referrer

Footnote 3

The nails must be 3.28 mm in wire diameter and 7.14 mm in head diameter, and must be driven into the specimen 9.5 mm from the edge, so that one-half of the nail is exposed on the other side of the specimen. The load must be applied perpendicular to the long axis of the nail at a constant speed of 3 mm/min to 4 mm/min until failure occurs. Because galvanized nails may bend in this test, a steel carding pin or a steel drill rod of approximately the same diameter may be used.

Return to footnote 3 referrer

Footnote 4

The MOR must be calculated based on the original board thickness. The swell must be based on the difference in thickness before and after the cycling procedure.

Return to footnote 4 referrer

Physical Properties for Type 5 per CAN/CGSB-11.3-M87
Property	Unit	Requirement
Nominal thickness	mm	9.0	10.5	12.7
Minimum thickness	mm	8.3	9.5	11.4
Maximum thickness	mm	9.7	11.2	13.3
Minimum MOR	MPa	13	13	13
Minimum tensile strength parallel to surface	MPa	7.0	7.0	7.0
Minimum tensile strength perpendicular to surface	MPa	0.17	0.17	0.17
Maximum water resistance (after 24 h) - water absorption	%	20	20	20
Maximum water resistance (after 24 h) - thickness swell	%	8	8	8
Minimum density	kg/m³	600	600	600
Maximum linear expansion (at 50%–90% relative humidity (RH)	%	0.30	0.30	0.30

© Canadian General Standards Board. This standard is withdrawn by CGSB due to limited use and support for their revision. Therefore, the information contained therein may no longer represent the most current, reliable, and/or available information on these subjects. CGSB hereby disclaims any and all claims, representation or warranty.

Installation requirements

The CCMC requires that evaluation holders provide instructions for the installation of the product(s) that:

do not contravene the National Building Code of Canada, or any provincial or territorial building codes; and
meet the requirements of CCMC minimum documentation requirements.

Manufacturing requirements

The CCMC requires that evaluation holders, at a minimum, demonstrate that the associated production process:

is operated under a documented quality system; and
meets the minimum requirements of the CCMC minimum documentation requirements.

Labelling requirements

The CCMC requires that evaluation holders ensure that product labels:

reference the associated CCMC number or mark; and
meet the requirements of CCMC minimum documentation requirements.

Additionally, in compliance with CAN/CGSB-11.5-M87, Section 6.2, packaging must be marked with the following information:

supplier’s name;
style of cladding component;
finish of cladding component;
colour of coating;
quantity (for siding panels, expressed in terms of effective coverage); and
“CAN/CGSB-11.3-M85.”

Where permanently identifying a product is not possible, other forms and methods of identification may be allowed pending review and approval by CCMC. Where applicable, the product must be marked with:

any necessary user safety information, unless a separate information sheet is provided; and
any additional information required by applicable acts and regulations.

Classification information

Products falling within the scope of this document are commonly classified by:

MasterFormat®

07 40 00 Roofing and Siding Panels
07 46 26 Hardboard Siding

Published CCMC evaluations

The following products have been evaluated to these requirements by the CCMC:

CCMC number:	Manufacturer:	Product names:
07893-L	Maibec CanExel S.E.C	CanExel Siding
13384-L	KWP Inc.	Naturetech^® Engineered Wood Siding
14058-L	Fabrication St-Laurent Inc.	St-Laurent Hardboard Siding

Code references

National Building Code of Canada 2015

Code references	Code provision
9.27.9.1.(1)	Factory-finished hardboard cladding shal ...
Table 5.9.1.1.	Standards Applicable to Environmental Separators and Assemblies Exposed to the Exterior

National Building Code of Canada 2010

Code references	Code provision
5.10.1.1.	Compliance with Applicable Standards
9.27.9.1.(1)	Factory-finished hardboard cladding shal ...

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Date modified:: 2022-02-07