Quote:
Originally Posted by tvp2003
I’m curious — what do you attribute that to, especially as it relates to Calgary? Different materials? Different building designs/codes/techniques? Better (or worse) workmanship? All of the above?
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The single biggest problem with modern air barrier construction is lack of detail in sealing the air barrier. Every penetration in the wall assembly has to be sealed against air intrusion from the inside. I've seen many cases where the air barrier is not detailed around electrical boxes for example and there is mold in the fiberglass insulation where moist air is condensing on the cold areas of the wall assembly like the back of the exterior sheathing.
2012 and 2018 building code has cracked down on sealing issues and mandates a continuous running principle exhaust fan, and more and more homes are being designed with HRV systems which help a lot.