Vapor / Discussions

Can you spray foam a house from the outside?

...vapor barrier all in one; going with celllulose will mean attention needs to be spent to keep it dry, make sure the wall is airtight, and that you have a vapor ...

Posted by Joan Lawrence July 11, 2019, 7:17 p.m. Wall assemblies - renovation 3 Responses

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

...vapor barriers, some with none and some with both. In cold climates you want vapor barriers on the interior, so you need to be careful not to apply a vapor-impe...

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

Can you put hemp insulation in an attic?

...vapor barrier if so, just wondering if you have an air barrier. If you don’t have a proper air barrier and you are removing all the insulation, then that is r...

Posted by Pamella Weatherly-Phillips Aug. 16, 2019, 11:49 a.m. Roof assemblies - renovation 1 Responses

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

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

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

What is the best practice to insulate a crawl space floor?

...vapor barrier between your conditioned space and unheated crawl space below. If you only had a subfloor then it would be easy to lay down a membrane first and p...

Posted by austin Fanning March 16, 2020, 8:55 a.m. Crawl spaces 4 Responses

Is it a good or bad idea to spray foam directly on the interior of shiplap siding?

...vapor barrier, insulation, weather barrier) , so you should have an air space separating your control layers and your siding to allow humid air to escape and mo...

Posted by MITCHELL KOCH Aug. 21, 2020, 3:49 p.m. Exterior cladding 1 Responses

Can you provide Crawlspace Insulation Design Assistance?

...vapor barrier / vapor retarder products are a poly, foil is among the least permeable materials, I just want to make sure you are getting the kind of product yo...

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

What is the best way to insulate my basement?

...vapor barrier after the studs, which only serves to keep walls wet, not keep them dry. Read more here – Why basements are moldy and how to fix them .

Posted by Chris Rogers Oct. 27, 2019, 11:23 a.m. Foundation and basement improvements 1 Responses

What is the best way to Insulate the crawl space of an old home?

I have a 120 yr old home with a dirt crawl space that is completely dry, no Mold in the entire home, has new windows and new insulation in the attic. I have st...

Posted by Aj Jan. 21, 2020, 8:13 a.m. Crawl spaces 1 Responses

Should you insulate an A-frame cottage with cathedral ceiling from the exterior or interior?

...vapor barrier placement and how much insulation, but since you mention that it is boards, and not plywood or OSB, you will for sure have air leakage though them...

Posted by J Genereaux Oct. 26, 2020, 10:38 a.m. Roof assemblies - renovation 1 Responses

Can a manufactured home be retrofitted with hempcrete?

...vapor barrier, and you can convert it into a cute tiny house with wood siding. You can even put a pitched roof over top and you can fill the wall cavities with ...

Posted by Chryss James Nov. 19, 2020, 9:06 p.m. Wall assemblies - renovation 1 Responses