Retarder / Discussions

Can you use a vapour retarder paint on the ceiling instead of using a poly vapour barrier?

I saw in your wall video that you advise to use a vapour retarder paint along with an outside air barrier. Can you do this for the ceiling as well, thereby tak...

Posted by Anwas Qwelten June 8, 2019, 3:56 p.m. Air and vapour barriers 2 Responses

Where should I put a vapour retarder?

...retarder and two-thirds outside. Would it make sense to put up one layer of insulation before wrapping with vapour barrier, and then two (or three) more layers ...

Posted by Jeffrey Connell March 14, 2020, 4:25 p.m. Wall assemblies - new construction 4 Responses

The thickness of vapor retarding latex paint - Is measurement wet or dry?

...retarder primer (vapor barrier paint) in our Edelweiss LEED Platinum Demo House instead of a 6 mil poly vapor barrier , it was for the walls not the floor. As f...

Posted by Kim Boas July 24, 2020, 10:36 a.m. Basements improvements 3 Responses

Can you Insulate a cinder block basement foundation with Rockwool?

...retarder or just use latex paint ? Code doesn’t require any vapor retarder in my area. But I am also trying to avoid getting condensation on cold foundation wal...

Posted by Victor B June 19, 2019, 11:41 p.m. Basements improvements 5 Responses

How do I create a complete air barrier using a vapour retarding primer?

...retarder primer won’t do anything for air leakage. What it can be used for is to stop moisture diffusion, which means preventing the moisture in the indoor air ...

Posted by Mihai Wilson May 3, 2018, 10:15 p.m. Wall assemblies - renovation 1 Responses

Does paint work instead of a poly vapour barrier?

...retarder primer . The bigger concern would be, does your home have an air barrier? More often than not over the last many decades the 6-mil poly is meant to be ...

Posted by Bill Fletcher May 6, 2020, 1:46 p.m. 1 Responses

Should a Vapor Barrier be installed over Exterior Grade Plywood?

...retarder, perhaps a ‘smart’ membrane. The following video explains fairly simply how vapor moves through walls and will help you understand the issue. Buildin...

Posted by Michael Klauck March 6, 2020, 1:24 p.m. Air and vapour barriers 1 Responses

Does using T & G wood plank instead of drywall affect where we put the vapor & air barrier?

...retarder primer) check with an inspector ahead of time. As for the toxicity, We used Benjamin Moore vapor barrier paint which was low VOC but not Zero VOC unfor...

Posted by Sue Colbourne Nov. 9, 2019, 6:16 p.m. Walls and ceilings - interior surfaces 3 Responses

Can you provide Crawlspace Insulation Design Assistance?

...retarder products are a poly, foil is among the least permeable materials, I just want to make sure you are getting the kind of product you think you’re getting...

Posted by Randy Christensen Dec. 10, 2019, 12:17 p.m. Crawl spaces 1 Responses

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

...retarder on the inside of the wall rather than the traditional 6 mil poly, to allow walls to also dry inwards. This is especially important in homes with air co...

Posted by Ian MacKay July 26, 2018, 2:48 p.m. Wall assemblies - renovation 4 Responses

How do you install rigid insulation to the outside of a brick house"

...retarder primer as we did on a demo house a few years ago. About insulation now – you could insulate the outside of the bricks, but rather than applying somet...

Posted by Gordon CASWELL Dec. 13, 2019, 11:38 a.m. Wall assemblies - renovation 1 Responses