Vapor barrier / Discussions

Can you use an HRV or ERV for radon removal in a dirt floor basement?

...vapor barrier you would see in cold climate walls, or a radon proof membrane for basement floors , but that will cost you quite a bit more money and it may not ...

Posted by Douglas Touart March 1, 2021, 5:15 p.m. Radon in Homes - Mitigation 1 Responses

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

...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 yet, it d...

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

What is the best way to insulate the basement of an old house?

...vapor barrier, but I would put the vapor barrier right against the foam and do the poly on top. And as for finishing the floor afterwards, yes you can, but I’...

Posted by Bryan Squirrell Jan. 14, 2020, 7:59 p.m. Basements improvements 1 Responses

How do you fix high humidity levels in a basement?

...vapor barrier below the concrete floor, so even if you did insulate and seal the walls with a spray foam vapor barrier , it will likely continue to absorb moist...

Posted by JR Tadinac Aug. 21, 2019, 11:26 a.m. Healthy indoor air quality 3 Responses

How well do Legalett slab on grades work?

We are planning a build for June 2020 in Prince Edward County, Ontario where there is 1 ft of topsoil, 2 ft of clay and then bedrock. Structure planned is a bu...

Posted by Steve Sykes Aug. 18, 2019, 3:21 p.m. Slab on Grade 3 Responses

Which house wrap is best?

...vapor permeable weather barrier, but more important than how they perform in laboratory testing is how they actually play out in real life after they are instal...

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

What type of insulation should I use ?

...barrier as well as vapor barrier / vapor retarder, see here the difference between air barriers and vapor barriers.

Posted by Dawn Wood Feb. 5, 2021, 12:02 a.m. Insulation and soundproofing 1 Responses

Which is the best basement insulation?

...vapor barrier, so depending on your climate zone and ideal construction method, a building inspector may or may not accept EPS as the functional vapor barrier. ...

Posted by Alex Kesheshian April 23, 2020, 12:29 a.m. Basements 1 Responses

What are the best Wall and Roof insulation choices and rain screen?

I am doing renovation and addition to the house and trying to make it as airtight as possible. After reading through multiple articles and your responses I was...

Posted by Valeriy Kraydman March 15, 2021, 3:32 p.m. 0 Responses

Where does a vapour barrier go when building a shed in southern Ontario?

...vapor barrier that satisfies building inspectors (as it looks the same as any poly vapour barrier) but it will also let moisture escape. It’s called certainteed...

Posted by Charley Nelson Nov. 5, 2020, 10:09 a.m. Wall assemblies - new construction 1 Responses

How do you remove moisture and condensation from basement walls?

...vapor barrier . This page explains what a mistake a basement vapor barrier is - Why are Basements Moldy? How to Fix & Prevent Mold in Homes A dehumidifier i...

Posted by Aaron Keating July 27, 2019, 4:51 p.m. Basements improvements 3 Responses

Where to get good tape for taping air barriers?

...vaporate in pretty short order, at which point they become brittle and come unadhered. Hi Mike, thanks for the helpful feedback! I'll go do some research into b...

Posted by Frank Suerich-Gulick Sept. 12, 2020, 7:25 p.m. Air and vapour barriers 2 Responses

Can you use spray foam Insulation under a slab?

...vapor barrier, air barrier, or to insulate difficult areas like basement rim joists or to create a radon barrier in a crawl space it’s a great choice, but in mo...

Posted by Linda Martin April 6, 2020, 11:54 a.m. Slab on Grade 1 Responses

How do I insulate my half below grade basement?

...vapor barrier playing out – that would be a vapor barrier on both sides of the stud wall, no? Dry inside does not mean for sure the concrete is dry, in fact i...

Posted by tom mckeand Oct. 14, 2019, 11:01 p.m. Basements improvements 1 Responses

Can I add Larsen Trusses and cellulose to 1920s House in Minneapolis?

...vapor barrier on the outside of a building is not a wise. I’m wondering if perhaps you misread that? You should never put a vapor barrier on the exterior of a w...

Posted by Ken Traefald Feb. 17, 2020, 2:30 p.m. Wall assemblies - renovation 3 Responses

How do you insulate a crawlspace?

...vapor barrier on the warm side of the insulation, meaning between the joists before the insulation. And due to the stack effect, this air will also rise into th...

Posted by Drew Weistend Nov. 14, 2017, 9:22 a.m. Crawl spaces 1 Responses

How do I stop a leak from my attic?

...barrier and vapor barrier properly at the same time. It’s not necessarily an easy job, but once you remove the existing batts you could lay down a 6 mil poly va...

Posted by Markus Duess Feb. 11, 2019, 12:42 a.m. Roof assemblies - renovation 1 Responses

How do you prevent moisture from getting into a basement footing?

...vapor barrier on top of the footing before the forms for the foundation walls are installed. So once the concrete walls are poured, moisture can’t pass between ...

Posted by Frank Liu June 24, 2020, 9:58 a.m. New foundations and slab-on-grade 1 Responses