Vapor / Discussions

How do you prevent walls from rotting in humid climates?

Hi there, we live on the gulf islands, building a new home as owner builders and figuring it out as we go. I worry that being in such a damp environment for so...

Posted by Rose Alderson Nov. 5, 2018, 4:34 p.m. Wall assemblies - new construction 1 Responses

How do you insulate a ceiling and finish it on the inside with wood?

...vapor barrier. And it sounds to me like you have something of a timber frame ceiling at least, which would give you room to insulate between the purlins or ra...

Posted by antonija klotz Oct. 20, 2019, 7:31 p.m. Roof assemblies - renovation 1 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 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 1 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

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

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

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

Can I use straw bale sips on the exterior of a shipping container home?

...vapor barrier, since the panels themselves can be the supporting structure. Converting shipping containers to homes is an interesting movement but is not as ‘...

Posted by Chelsea Teresak Nov. 28, 2020, 9:49 p.m. Wall assemblies - renovation 1 Responses

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

...vapor barrier ’ I suspect you are writing from Canada? There’s no place in the great white north where you would want to put a vapour barrier on the outside of ...

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

How do I stop a leak from my attic?

...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 vapor barrier ...

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

In the winter should you heat a low/dirt floor crawl space with a furnace vent?

In buying a old house with a low/dirt floor crawl space and plumbing under the home, would heating the part of the plumbing area cause any mold or other proble...

Posted by janis hobson Dec. 11, 2019, 3:17 p.m. Crawl spaces 1 Responses

Followup to the question How do you install Larsen Trusses on a home in Minneapolis?

Perhaps my wording should have been, wrap the poly around the sheathing, then nail on the Larsen Trusses. My house like most in built in the early 1900's, has ...

Posted by Ken Traefald Feb. 27, 2020, 1:49 p.m. Wall assemblies - renovation 1 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

How do you build a mold-free basement in a new construction house?

...vapor barrier, or drywall just yet, so is it at the stage of wood only? Mold typically forms in basements when wood studs and insulation are sandwiched agains...

Posted by Charmaine Herzig Feb. 10, 2020, 7:32 p.m. Basements improvements 3 Responses

What is the best way to insulate the ceiling of my crawl space?

...vapor barrier. Generally speaking, we are fans of Rockwool (mineral wool) insulation in cases when you aren’t sure of conditions, because it is not harmed by mo...

Posted by Judy Mendel Feb. 17, 2020, 11:10 p.m. Crawl spaces 4 Responses

How do you insulate a cottage crawlspace and install radiant floor heat?

we are thinking of upgrading our cottage. Currently it is off the ground at various heights, from 6" to 3 ft. Supported by cement blocks at various locations u...

Posted by Todd hall June 28, 2020, 8:36 a.m. Crawl spaces 1 Responses