Air and vapour barriers
Replacing polyethylene vapour barriers with latex paint vapor control
...Vapour retarder latex primers:
Firstly, the classification of a material as either an impermeable ‘vapour barrier’ or a semi-permeable ‘vapour retarder’ is determined by how much water vapour passes through the material under specific conditions.
There are vapour retarder primers on the market that exceed the requi...