Vapour barrier / Discussions

What is the best way to insulate a home from the outside?

...vapour barrier on the inside, and my choice would again be the Rockwool in that case to avoid incidentally installing an additional vapour barrier on the outsid...

Posted by Sylvie Gagnon Dec. 12, 2017, 11:58 a.m. Wall assemblies - renovation 1 Responses

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

...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 barrier ...

Posted by Babak K July 27, 2020, 12:22 a.m. Air and vapour barriers 3 Responses

What is the best way to insulate the exterior walls of an older home?

...barrier or vapour barrier . Though you do in ‘effect’ likely have a makeshift vapour barrier as there is likely several coats of oil paint. Along with insulatio...

Posted by Geoff Kavanagh June 30, 2020, 4:01 p.m. Wall assemblies - renovation 1 Responses

Do I need a standard 6 mil poly vapor barrier with dense cellulose exterior wall?

...barrier over the cellulose on the inside under the drywall, will I then cause vapor to be trapped between the outside vinyl /foam board and poly barrier. The fo...

Posted by jeff Chormann May 1, 2020, 9:18 a.m. Air and vapour barriers 2 Responses

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

...barriers as a radon barrier, which is better than nothing, but I’d want a thicker one for my home. There is a barrier called Radon Block, which is first of al...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

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

...vapour barrier on the exterior sheathing and therefor have never needed to worry about poly vs. vapour barrier paint. In my opinion, the paint seems like a grea...

Posted by Trevor Prinz Nov. 26, 2019, 4:03 p.m. Walls and Roofs 5 Responses

Which house wrap is best?

...barrier and how to install siding as well – How to install air barriers properly for a durable and energy efficient house How to install siding so walls can...

Posted by Kathy Moller Aug. 2, 2020, 11:50 a.m. Air and vapour barriers 1 Responses

Can I spray foam insulate from the outside?

...barrier . And read here for more information about choosing breathable weather barriers . Most specifically, read our guide page to find the best way of insta...

Posted by Kurt Klischuk June 6, 2019, 8:56 a.m. Wall assemblies - renovation 3 Responses

How do you make an airtight house envelope?

...barrier, and even spray foam can sometimes shrink and crack, leaving gaps that can lead to air leakage. Are you stripping the building down to the sheathing? If...

Posted by Valeriy Kraydman Dec. 1, 2020, 2:52 p.m. Air and vapour barriers 1 Responses

Can you use polyiso insulation on the exterior of a wall behind cedar siding on the west coast?

...barrier . Using it on the outside means you are installing an exterior vapour barrier and that’s not a good thing. what made you choose Polyiso? We would alte...

Posted by Iain Matheson Jan. 28, 2020, 10:38 p.m. Wall assemblies - renovation 2 Responses

Do you have a diagram showing effect of winds on the pressure inside the house?

If the wind is from the south, where and how are positive pressures created in the home? Unfortunately we don’t have any diagrams to clearly depict the effects...

Posted by Bryan Bargen June 8, 2018, 5:20 p.m. Air and vapour barriers 1 Responses

Do I need to spray foam the ceiling of my crawl space to help winterize it?

...vapour barrier as well as air barrier and thermal barrier. It hardens enough that you can walk on it if necessary, and it sounds like a space you won’t even be ...

Posted by Sheilagh Thompson Jan. 21, 2021, 1:48 p.m. Crawl spaces 1 Responses

Should you allow air flow through a crawl space with a dirt floor?

...vapour barrier on the ground, but the rest is a little suspect to me as it is to you. First though I would point you to this page in case you haven’t seen it ye...

Posted by Amber Murray Aug. 17, 2020, 10 p.m. Crawl spaces 3 Responses

Should a Vapor Barrier be installed over Exterior Grade Plywood?

...vapour barrier, where it is at risk of condensing. You definitely need some form or vapor barrier or vapor retarder, perhaps a ‘smart’ membrane. The following v...

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

How can I get rid of moisture between the vapor barrier and the insulation in a basement?

...vapour barrier. By cutting a bunch of holes in your vapour barrier you are letting moisture though, which is testament to the fact that the vapour barrier is ...

Posted by David Mitchell Aug. 14, 2018, 6:32 p.m. Basements improvements 21 Responses

How do insulate the outside of a log home?

...barrier . Covering the Rockwool boards with a house wrap and then attaching it with strapping may lead to more holes. I would suggest you apply an air barrier...

Posted by Michael Hickey Aug. 2, 2018, 6:03 p.m. Wall assemblies - renovation 1 Responses

Can you provide Crawlspace Insulation Design Assistance?

...barrier, and enable you to create a crawlspace radon barrier as well. Insulating the joists is a fine idea, but I would be super careful about keeping the moi...

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

Halo Exterra rigid exterior insulation - has anyone work with it?

...barriers and vapour barriers. Glad you're finding value in our pages, hope this all helps! The Difference between air barriers and vapor barriers Hi Mike ...

Posted by George Shannon Jan. 21, 2020, 3:39 p.m. Insulation and soundproofing 3 Responses