Weather resistant barrier / Discussions

Where should I put an air barrier on a log home insulated from the outside only?

...barrier location if perfect. I would point out that some air barrier materials allow moisture to pass, and some stop it. to install an air barrier on the outside of the insulation you need to be sure not to trap moisture, so be sure you have a vapor permeable membrane, read more here - Choosing the Right House Wrap / W...

Posted by Geneviève Rock Dec. 5, 2025 Air and vapour barriers 1 response

What is the best material to use on top of plywood for water proofing?

...weather barrier for the exterior of a home see here – Choosing a house wrap, which is best? In our 2015 LEED Platinum Demo house we installed a peel and stick weather barrier / exterior air barrier, see our how to install an air barrier properly DIY video. ZIP systems are a good ‘all-in-one house sheathing / weather ba...

Posted by Babak K July 27, 2020 Air and vapour barriers 3 responses

Can you spray foam a house from the outside?

...barrier, and as long as you have at least 2 inches it would also be a suitable vapor barrier, and it will offer you thermal protection with the highest R value per inch.   You possibly 'could' leave the sheathing on and blow foam through holes, but I would leave that call up to the individual contractor to see if they ...

Posted by Joan Lawrence July 11, 2019 Wall assemblies - renovation 3 responses

Can I spray foam insulate from the outside?

...weather barrier. And read here for more information about choosing breathable weather barriers. Most specifically, read our guide page to find the best way of installing exterior insulation to the walls of homes here Let us know more details about our wall assembly and what is behind the siding if you'd like, and we ma...

Posted by Kurt Klischuk June 6, 2019 Wall assemblies - renovation 3 responses

Is the ZIP sheathing system good or bad for water control?

...weather resistive membrane), which is basically a mesh that is attached to an OSB sheathing panel with a paint applied. So it is an all in one product acting as the sheathing, the weather barrier and air barrier. It’s a great concept, but you are not alone in your skepticism. Before you give it a yay or nay, here are a...

Posted by Trevor Prinz Nov. 26, 2019 Walls and Roofs 5 responses