Vapor / Discussions

What is the best way to insulate rim joists with EPS and batts?

...vapor barrier and the thermal barrier. For an air seal, you may want to actually do that first, which could be a simple matter of applying caulking or acoustic ...

Posted by Steve J July 18, 2019, 3:53 p.m. Basements improvements 1 Responses

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

...vapor 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 woul...

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

Can you install foam boards directly against basement walls?

...vapor barrier) you would be ensuring that the wall cannot dry to the interior either, so what you would have is an ideal mold incubation chamber. If you are s...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 4 Responses

What is the best way to do a basement renovation?

...vapor barriers was originally to prevent moisture accumulation and damage in walls, which it does above grade, but below grade a vapor barrier CAUSES moisture a...

Posted by BIG FOOT Nov. 18, 2020, 9:33 a.m. Basements improvements 1 Responses

Can I spray foam insulate from the outside?

I bought an old timer home on Gibsons, BC and the siding needs replacing. I want to use the opportunity to seal up and insulate the wall cavity once exposed. I...

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

Can basement walls to dry to the inside with foam board?

...vapor barriers on basement walls. The straight answer is that it’s fine if concrete stay wet. Virtually every concrete foundation wall will stay wet indefinit...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 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

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

...vapor barrier paint here on our site or somewhere else? We tried it (we could because we did the exterior peel and stick membrane I mentioned above), it was par...

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

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

Hello, We own an 800square foot cabin in Northern Saskatchewan that is not winterized. The foundation was originally on concrete blocks so we had it lifted a...

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

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 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 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 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

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