CSA publishes guidelines for overland flood protection

Published: August 27, 2018

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New guidelines advising how properties can mitigate flood risk and boost basement flood protection have been published by the Canadian Standards Association (CSA).

The CSA Z800 guideline was developed to aid stakeholders in protecting against basement flooding and mitigate risk. It is a first edition guideline that works with the revised and previous National Building Code of Canada (NBCC) Part 9.

CSA says the new documentation was “motivated both by current basement flood risk and by the potential for increased risk in many regions of Canada under changing climate conditions.”

Included in the standards are ways to protect against overland flooding from rain events, sewer backup and deluge from storms. Also accounted for are plumbing and drainage problems, floods caused by proper installation of mitigation techniques, and infiltration flooding.

CSA Z800 aims to both prevent floods or reduce basement flooding severity when it is occurs. The widespread canvas for the guidelines includes for urban and rural residential houses whether new, renovated, or rebuilt.

CSA says all of the points in the guidelines meet existing standards that function across jurisdictions in Canada. Additionally, the documents are Standards Council of Canada compliant.

The Canadian Standards Association collaborated with the Institute for Catastrophic Loss Reduction (ICLR) on the project. Other contributors included the Intact Centre for Climate Change Adaption, and Norton Engineering.