Building Envelope

September 25, 2025

Big Buildings, Small Holes: Measuring and Reducing Air Leakage on Large Multi-Res and Commercial Buildings

Join industry experts Gord Cooke and Kyle Anders from Building Knowledge Canada, Venoth Jeganmohan from Enbridge Gas, and Randy Van Straaten of Building Enclosure Labs for an engaging webinar on the state of whole-building air leakage testing in new commercial construction across Ontario.

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July 16, 2025

What's Up With Roof Ice Dams in 2025?!

As homes across North America experienced increased snow loads this winter, the cases of ice-damming have gone off the charts. Join Andy Oding and Trevor Trainor, President of Bawating Building Science, as they dive into the fundamental building science of ice dams.

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January 30, 2025

Advantages of Exterior Air Barriers

New materials and techniques are prompting many builders to re-examine how they ensure the airtightness of building envelopes—and literally turning this important work inside out. In this video, Building Knowledge Canada leaders Gord Cooke and Andrew Oding visit a home under construction and discuss the advantages of securing airtightness from the building exterior.

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November 28, 2024

Air Barrier Detailing in Attached Housing: Compartmentalization

In this video, Building Knowledge Canada President Gord Cooke describes the construction techniques that make multi-family buildings better for everyone by ensuring that the party wall in multi-family dwellings is as airtight as an exterior wall.

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November 6, 2024

Optimizing Winter Humidity and Water Use

Maintaining optimal indoor humidity levels in cold climate houses has evolved greatly, with the introduction of heat-recovery ventilators and energy-recovery ventilators, whole-house humidifiers and the increasing sophistication of controls in “smart” thermostats. Discover established strategies for optimizing all these systems with the help of an article by Gord Cooke.

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October 17, 2024

The Mechanisms and Measurement of Air Leakage in Houses

Join Building Science Expert Trevor Trainor as he presents some simple hygrothermal modeling scenarios for standard walls across various Canadian climate zones. A bit of myth-busting along with some cautionary tales about building-to-minimum-code. A dive into why Poly as a VB (vapour barrier) is a poor choice in many regions of Canada—and the importance of vapour diffusion retarder technologies and products.

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