Non-Member Cost :




25% off for CHBA BC members – learn more here

CPD Points:


BC Housing Competency Area:

Construction Technology

Time Commitment:

2 hours

Delivery Method:


Course Description

This 2-hour online live session will help participants understand the key principles of limiting suite-to-suite air leakage in small scale multi-unit housing.

The course will include recent research on guarded vs unguarded testing of attached homes, as well as a discussion of construction techniques that can be employed to achieve improved levels of compartmentalization across party walls, floors, and ceilings. Benefits to occupants will also be reviewed, including content on sound transmission and indoor air quality. Relevant changes to recent and future building codes may also be included.

Refresher on the basics of blower door testing, and the differences between guarded and unguarded tests

A review of air leakage metrics and their relationship to attached unit testing (NLR50 and ACH50)

Overview of typical party wall details

Review of improved compartmentalization practices including: critical air sealing details, cost effective sealing methods, discussion of materials & application

House-as-a-system impacts of improved compartmentalization

Course Format

All online courses require successful completion of the following components:

  • Attendance for the full duration of the webinar session

Course Material

There is no textbook for this session. All materials are contained within the presentation during the webinar session. Any supplementary materials provided by the speaker will be emailed to students post-session, if applicable.

Meet the Speaker


Director of Building Science
Building Knowledge Canada Inc.

Mark is a well-known professional architect, Registered Energy Advisor and building science consultant and joins the BKC team as a partner and Director of Building Science. Mark has always been passionate about creating buildings that perform exceptionally well. Mark started as a site inspector at Building Energy Inc. in 2008 and became its owner in 2011. He has helped develop software tools, sits on several advisory boards, and continues to actively lead the industry toward positive change. Mark was named Ontario’s Energy Advisor of the Year in 2013 and 2018.

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