How do you do a vapor barrier in a dense pack cellulose wall?

Ian MacKay
Updated: Aug. 1, 2020

On the page of your site about dense packed cellulose walls  you show an exterior wall with 10" plate & sill and two rows of 2x4 studs. This looks fantastic, but the idea of vapour-permeable membranes on both sides makes me nervous in combination with cellulose. In Ottawa, temp can drop to -25 in winter and reach +30 or more with high humidity in summer. Lots of heat, lots of air conditioning. Are you absolutely sure that no vapour barrier is okay? How do I convince the building inspectors?

Responses (4)

Ian MacKay 5 years ago
Ecohome 5 years ago