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[CCMC 13634-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 products, when used as a foundation wall drainage material in accordance with the conditions and limitations stated in this evaluation, comply with the following code:

Ontario Building Code 2017

ID Code provision Solution type
09-14-02-01-02-b- Foundation Wall DrainageAcceptable

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 names

  • Isostud
  • Marflex
  • Power Drain Isostud

Product description

The product is a high-density polyethylene (HDPE), semi-rigid plastic sheet membrane extruded in a manner that results in a dimpled surface on one side and a flat surface on the other. The dimples are approximately 7.5 mm high and are intended to provide an air gap between the wall and the adjacent soil. The product is available in rolls that are approximately 0.78 mm thick, usually 20 m long and up to 4 m wide, as required.

To ensure correct application, a range of accessories (such as anchors and moulding strips) are included with the product.

The figures below illustrate the product and one of the accessories.

Figure 1. Side facing wall


Figure 2. Anchor

Manufacturing plant

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

Product namesManufacturing plant
Kearneysville, WV, US
IsostudProduct evaluated by the CCMC
MarflexProduct evaluated by the CCMC
Power Drain IsostudProduct 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.

  • Based on the evidence provided, the product has been classified as Type 2 (applications up to depths of 3.7 m), Class B (cups facing soil).
  • The product must be installed in accordance with the manufacturer’s installation manual. In the event of conflict between the manufacturer’s instructions and this evaluation, this evaluation shall govern.
  • The product was evaluated for use against cast-in-place concrete and concrete block foundations only.
  • The product is a dimpled membrane drainage product designed to act as a protective layer or a capillary breaking layer against the foundation wall to protect the wall against transient or intermittent water that may come in contact with the surface of the wall.
  • The product has been evaluated for use in vertical applications in depths of 3.7 m below grade. Applications greater than 3.7 m are considered to be outside the scope of this evaluation.
  • The product is only one portion of the total foundation drainage system, which consists of a combination of design and construction processes that use different products. In particular, the product must be bent at the footing to guide water past the cold joint to a drainage pipe located outside of the footing at the bottom of the wall. This pipe will drain the water collected by the product toward an outflow (i.e., sewer). The product relies on a foundation wall drainage system that conforms to Subsection 9.14.3., Drainage Tile and Pipe, or to Subsection 9.14.4., Granular Drainage Layer, of Division B of the OBC 2017.
  • The placement and grading of backfill must conform to the requirements of Subsection 9.12.3., Backfill, of Division B of the OBC 2017. It is recommended that an impervious “topping off” layer of clay or silt material be placed on top of the backfill with a positive slope leading surface water away from the building.
  • The product must be protected from exposure to ultraviolet (UV) sunlight within a maximum of six months of its installation.
  • Long-term performance of the drainage system will depend on local conditions, such as the soil type, hydrogeology of the site, mineralogy and presence of micro-organisms in the soil (e.g., iron ochre), as well as compatibility of the filter with the soil, among other considerations. This evaluation does not free the project from requiring proper engineering design of the drainage system.
  • The performance of fixtures used to anchor the product in the wall was evaluated for a single anchor. It is the manufacturer’s responsibility to define the pattern and spacing of anchors considering the anchor strength as well as site-specific issues, such as the type of soil, how it will interact with the product, and the backfilling method used.
  • The top of the membrane and all vertical joints and terminations must be mechanically fastened with trims, molding strips, termination bars or other accessories to prevent soil particles from entering behind the membrane. Overlaps or joints which are occasionally exposed to a head of water must be sealed to avoid water entry and associated dragging of soil particles between the membrane and the foundation wall. Accessories used to anchor the product are part of the evaluation.
  • The product must be labelled with the manufacturer’s name or logo and the phrase “CCMC 13634-R.”

  Technical information

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

Evaluation requirements
Criteria number Criteria name
CCMC-TG-334623.01-15CCMC Technical Guide for Foundation Wall Drainage Systems – Dimpled Membranes

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.

Table 1. Test results for the product
Property Unit Requirement Result
Compressive strength (initial) kPa ≥ 150 260
Dynamic impact resistance (mean failure energy) J ≥ 2.45 11.6
Creep resistance (residual thickness at 25 years/10°C) % ≥ 40% at 25 years/10°C 80.9
Cold bending at –30°C N/A No visible crack No visible crack
Tensile strength at yield kN/m ≥ 8 MDTable footnote (1) 9.4, XD 8.5
Tensile strength – elongation at break % ≥ 25  XD 55.8
Tensile strength – anisotropy ratio ≥ 0.5 1.11
Heat aging for 8 weeks – dimensional change % ≤ 1 MD –0.8, XD –0.8
Heat aging for 8 weeks – weight change % ≤ –0.1 –0.4Table footnote (2)
Heat aging for 8 weeks – residual compression strength % ≥ 80% of initial 109.9
Heat aging for 8 weeks – creep resistance after heat aging (residual thickness at 25 years/10°C) % ≥ 40% at 25 years/10°C 77.9
Resistance to alkaline environment – appearance N/A No visible crack No visible crack
Resistance to alkaline environment – residual compression strength % ≥ 80% of initial 105.6
Resistance to alkaline environment – appearance (cold bending at –30°C) N/A No cracks at room temperature No visible crack
UV resistance – residual compression strength % ≥ 80% of initial 105.8
UV resistance – oxidation induction time (OIT) after 500 hours of UV exposure min. 5 4.5Table footnote (3)
Geometrical properties
Orientation of dimples Report value Diagonal
Number of dimples per unit area Dimples/m2 Report value 1526
Overall thickness mm Report value 7.49
Sheet thickness mm Report value 0.78
Hollow core thickness mm ≥ 5.0 6.72
Anchorage performance kN/anchor Report value 0.726

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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