Vapor barrier / Discussions

Can you Insulate a cinder block basement foundation with Rockwool?

...vapor retarder or just use latex paint ? Code doesn’t require any vapor retarder in my area. But I am also trying to avoid getting condensation on cold foundati...

Posted by Victor B June 19, 2019, 11:41 p.m. Basements improvements 5 Responses

What is the best way to Insulate a basement and floor joists that are embedded into the concrete?

...barrier afterwards/ that would actually be a bit better. There was usually a poly vapour barrier installed after the insulation and stud wall seemingly to ensur...

Posted by David Pereira April 28, 2020, 10:34 p.m. Foundation and basement improvements 2 Responses

Can you spray foam a house from the outside?

...barrier , and as long as you have at least 2 inches it would also be a suitable vapor barrier , and it will offer you thermal protection with the highest R valu...

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

Can you put hemp insulation in an attic?

...barrier you mention a ‘foil barrier’ on the floor of the attic as well as the underside of the roof deck? That would be a vapor barrier if so, just wondering if...

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

Can you insulate an existing slab on grade floor?

...vapor barrier and see if any beads of moisture form, and if there is a vapor barrier then there shouldn’t be any. Most of the extreme variations in temperature ...

Posted by Patrick Berkeley Dec. 31, 2020, 10:14 p.m. Foundation and basement improvements 5 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

What is the best way to insulate a concrete block house?

...vapor barrier, but that should only be installed in a cold climate, so I’m assuming you’re a bit to the north. Foil will reflect some heat, but not usually en...

Posted by kent wardecke Oct. 17, 2020, 11 a.m. Foundation and basement improvements 2 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

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

...barrier, it would also keep the vapor barrier on the warm side.

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

Combo structural sheathing, WRB and thin insulation panel in Ontario?

...barrier in terms of vapor permeability - Weather barriers and home wraps – which one is best? We also have this page that will top up your understanding, ab...

Posted by Steve Bull Jan. 14, 2020, 6:06 p.m. Walls and Roofs 3 Responses

How do you prevent mold under flooring of a house on concrete slab?

...vapor barrier or a sufficient amount of EPS foam insulation would prevent moisture from migrigrating up from the ground where it can cause mold. A couple of que...

Posted by Linds Cullen Dec. 31, 2020, 4:11 p.m. Slab on Grade 2 Responses

Should I bother testing for radon in a gutted and uninsulated house?

...vapor barrier, so just doing a vapor barrier itself puts you halfway to a passive radon stack, in that 6 mil poly vapor barriers are standard fare for radon bar...

Posted by Luba Sharapan March 27, 2021, 12:04 p.m. Radon in Homes - Mitigation 3 Responses

What kind of insulation do you recommend to put on my exterior sheet rock wall?

...vapor permeable. Here is our page on Choosing the best rigid insulation , you may also want to check out this page about choosing the right weather barrier ...

Posted by Uwe Thomas May 22, 2020, 10 p.m. Insulation and soundproofing 1 Responses

How do you prevent walls from rotting in humid climates?

...barrier have had mould show up in less than 2 years on his north wall. How can we avoid getting mould? If your neighbour had their walls rot that could be for a...

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

How do you insulate concrete basement walls and avoid mould?

...vapor barrier. That is also why you should never put an interior vapor barrier on basement walls, since the source of moisture that could damage the walls is no...

Posted by William Hunter Feb. 22, 2021, 11:40 a.m. Basements improvements 2 Responses

How thick should EPS foam insulation on basement walls be?

...vapor barrier. Read more here about the characteristics and applications of different types of foam insulation, as they are all a bit different and not all grea...

Posted by Derrick R March 17, 2021, 9:13 p.m. Insulation and soundproofing 3 Responses

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

...barrier DIY installation video . And where did you find the vapor barrier paint here on our site or somewhere else? We tried it (we could because we did the e...

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

Can we make a well insulated timber frame home?

...barrier properly ) then it can also be airtight. The foam within the core of a SIP acts as the vapor barrier. You could also do it with Straw bales, and if it c...

Posted by Jeremy Sewall Feb. 18, 2021, 1:47 a.m. Wall assemblies - new construction 1 Responses