TECHNICAL RESEARCH
INDUSTRY EDUCATION
Builder Guide to Site and Foundation Drainage – Best Practices for Part 9 Houses
Description This guide outlines current industry best practices for Part 9 buildings with respect to site drainage, foundation drainage, and below-grade building envelope assemblies. It provides direction for builders, homeowners, and building officials, and emphasizes basic building code requirements and best practices. The guide also addresses conditions which may be faced on more challenging sites (due to local geology, climate, or topography), discusses soil gas control, and provides guidance on maintenance and drainage remediation for existing buildings. The goals of the guide are to increase the level of awareness in the industry about the importance of site and foundation drainage, and to ultimately reduce the risk of post-construction water ingress into below-grade spaces, which is understood to be an increasing issue for warranty providers, insurers, and homeowners. Impact This guide will educate homeowners and builders on the key strategies and approaches to reducing post-construction water ingress into below-grade spaces for Part 9 buildings in British Columbia.
Updated version planned for 2020
Status:
Audience: Builders, contractors,
developers, designers, and building officials
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41 HOUSING RESEARCH & EDUCATION PROJECT HIGHLIGHTS | JUNE 2020
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