Air and vapour barriers
Replacing polyethylene vapour barriers with latex paint vapor control
...Building Code of Canada & local US building code regarding water vapour diffusion, with a vapour permeance in the area of 30 to 36 ng, which is about half of the 60 ng often allowed by code.
Vapor barrier primer meets building code © Ecohome
So concerns that primers are insufficient to control vapour dif...
