Weather 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 proper location of a vapor barrier in a home in New York State?

I read a couple of articles regarding vapor barriers and insulation.  I live in update NY, our home was constructed in 1952.  We are adding a full shed dormer with 2x6 walls and 2x12 rafters.  Our plan is to use closed cell in the walls and ceiling - which will have a copper standing seam roof.  Code requires a Tyvek t...

Posted by Michael Boice Jan. 15, 2022 Air and vapour barriers 2 responses

Is the ZIP Sheathing system better than house wrap?

...barrier. Weather barrier house wraps like Tyvek, Home Wrap etc, are airtight as a ‘product’, but once you slam a few thousand staples into them, missing the mark with a few hundred probably and doing nothing but creating a hole for nothing, it is hardly effective as an air barrier. Not to mention that most commonly-use...

Posted by Fred Martens Dec. 18, 2021 Walls and Roofs 1 response

How do you improve an old block foundation with no insulation or exterior moisture barrier?

...weather here near north shore of Lake Erie, dehumidifier died. Found little 2-3" wide puddles along north wall, condensation inside poly at joists.  Moved wall shelving from east wall and found  very large puddling, some apparently had been there prior to this latest addition of moisture (along east wall).  Have had 7 ...

Posted by Wilhelmina Lange March 11, 2021 Foundation and basement improvements 2 responses

What is the best way to do interior and exterior insulation in a cold climate?

...barrier and vapour barrier.  Leaning towards rockwool as we are in a extreme fire zone.  From the inside out I am thinking Drywall, Vapour barrier, rockwool, sheathing, 2" rockwool, tyvek, rainscreen, siding.  Is this correct? It also appears there are a few rockwool products that can be used for exterior insulation an...

Posted by Joshua Eckhaus Nov. 17, 2022 Wall assemblies - new construction 1 response

I have many issues with my house where should I start?

...barrier so you can find and fix them.  That list of questions is pretty long, and I think the best place for you to start is figuring out what your budget is to make repairs, as that is a rather extensive list.  The best way we can help at this point is to lead you to some relevant pages that cover the topics you are ...

Posted by Bryan Squirrell Sept. 29, 2019 Wall assemblies - renovation 1 response

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

What type of Insulation can I use on the exterior of my home?

...barrier, but as it likely has multiple coats of oil paint by now it would pretty much have an interior ‘vapor barrier’ anyway, just with a few generations worth of oil paint being applied. What you are likely missing at this point is an effective thermal barrier and air barrier, so if you are going to redo the exterior...

Posted by Scott Muller April 18, 2019 Wall assemblies - renovation 5 responses

Which house wrap is best?

...weather barrier house wrap like Tyvek is intended to be breathable and let moisture pass though it, and you can usually find permeability rates listed on the manufacturers website specs pages. Simply for good measure we would recommend getting the most vapor permeable weather barrier, but more important than how they p...

Posted by Kathy Moller Aug. 2, 2020 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

Combo structural sheathing, WRB and thin insulation panel in Ontario?

...weather barrier in terms of vapor permeability - Weather barriers and home wraps – which one is best? We also have this page that will top up your understanding, about choosing house sheathing. In here you will learn some of our concerns about all in one OSB and insulation panels and how they could possibly pose a pro...

Posted by Steve Bull Jan. 14, 2020 Walls and Roofs 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