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[CCMC 12722-L] CCMC Standard 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

Product information

Product names

  • GreenGuard®LG-CM
  • GreenGuard®LG-DC
  • GreenGuard®LG-SB
  • GreenGuard®LG-SL
  • GreenGuard®LG-SLX

Product description

The products are green-tinted, extruded polystyrene (XPS), rigid board thermal insulation.

The different model designations are based on the ends being squared or shiplapped, or the insulation having a thin plastic cap sheet on both sides. The insulation is available in various thicknesses, ranging from 12.5 mm to 102 mm, in widths of 600 mm or 1 200 mm, and lengths of 2 428 mm or 2 743 mm.

Manufacturing plant

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

Product namesManufacturing plant
Winchester, VA, US
GreenGuard®LG-CMProduct evaluated by the CCMC
GreenGuard®LG-DCProduct evaluated by the CCMC
GreenGuard®LG-SBProduct evaluated by the CCMC
GreenGuard®LG-SLProduct evaluated by the CCMC
GreenGuard®LG-SLXProduct evaluated by the CCMC

Product evaluated by the CCMC Indicates that the product from this manufacturing facility has been evaluated by the CCMC

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CAN/ULC-S701.1:2017, Type 4Standard for Thermal Insulation, Polystyrene Boards

The products' classification, long-term thermal resistance (LTTR) and water vapour permeance (WVP) values are provided in the following table.

Table 1. Classification, design LTTR and WVP specification of the products
Product Name Classification Design LTTR (m2·°C/W)
50 mm thickness
WVP (ng/(Pa·s·m2))
25 mm thicknessTable footnote (1)
GreenGuard® LG Type 4 1.68 60


Administrative information


This evaluation is issued by the Canadian Construction Materials Centre (CCMC), 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.


© 2022 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.