Air and vapour barriers

Exterior air barrier membrane © Ecohome
Air and vapour barriers

How to install an air barrier for reduced air leakage - video

Air leakage is responsible for a large portion of the heat loss and moisture damage in walls, reduce air leakage for durability and energy savings. The Ecohome Demo House has a vapor permeable exterior air barrier, and with an ACH rate of .69 it is  several times more airtight than the average new home. Air leakage…

Barreras de aire y vapor en la construcción de estructuras de madera
Air and vapour barriers

Interior sheathing as an air and vapor barrier

3/4 inch OSB sheathing on the interior can be an excellent air barrier and a great vapor barrier as well. Taping sheathing as an air barrier for walls There has been a steady evolution in the way we build homes over the last couple of decades, and the old standby wall recipe of 2x6s, fiberglass insulation and…

Vapor retarder latex primer instead of polyethylene sheet
Air and vapour barriers

Replacing polyethylene vapour barriers with latex paint vapor control

Vapor retarder latex based primers can be twice as effective as the requirements laid out in many building codes regarding vapor barriers requirements. Vapor barriers in walls, why polyethylene can be problematic It would probably surprise many home builders to hear what really causes moisture accumulation in walls…