Board / Discussions

What type of insulation under an outdoor deck frame with 2x8s?

...board to close it off and limit rodent. I m in Quebec Canada so winters are cold. The walls are aluminium, i though I could insulate them with 1.5 " rigid boa...

Posted by Eric Dalpe Sept. 15, 2020, 9:13 a.m. Wall assemblies - renovation 4 Responses

Which exterior insulation is best to create at thermal break in an bungalow in Alberta?

...board and new siding. We need a cost effective solution to create a thermal and air barrier on our 1970s raised bungalow. We have a fully insulated (with spra...

Posted by Rebekah Barnes Jan. 17, 2020, 10:07 p.m. Wall assemblies - renovation 1 Responses

Do I need a standard 6 mil poly vapor barrier with dense cellulose exterior wall?

...board and poly barrier. The foil faced foam board is not completly tight against the underlying shingles and I assume does allow for some air movement underneat...

Posted by jeff Chormann May 1, 2020, 9:18 a.m. Air and vapour barriers 2 Responses

What is the best exterior Wall and Roof Rigid Insulation for a barn renovation?

...Board installed prior to insulation being emplaced with roofing paper / water screen wrapped about 1/2 over the top of the facia board. Metal roof attached to s...

Posted by Ron Busch June 27, 2020, 3:50 p.m. Wall assemblies - renovation 1 Responses

What is the best way to insulate the exterior walls of an older home?

...board/insulbrick covered by vinyl siding. I would like to stip it to the cedar board, putting a wrap over it, but then what would you recommend for insulating a...

Posted by Geoff Kavanagh June 30, 2020, 4:01 p.m. Wall assemblies - renovation 1 Responses

What is the best way to insulate a 2x8 wall?

...boards I think eps might be the best to use, but not sure if the foil face would be good, may not be breathable...might be better to just do eps board and buy a...

Posted by Michael Sweglar July 8, 2020, 10:43 a.m. Wall assemblies - new construction 3 Responses

How do you insulate an exterior wall from the outside?

We live in an old frame farmouse. I need to replace the the board and batten on one wall. We want to insulate this wall (currently, there's literally no insula...

Posted by Stuart Seldon Feb. 11, 2021, 12:21 p.m. Wall assemblies - renovation 1 Responses

What's the difference between EPS and GPS insulation?

...boards, which are very difficult to find here in QC, I've bumped into a 4' x 8' x 1" thick board, called GPS. Do you have a webpage about GPS insulation? I want...

Posted by Ronald Tetrault Feb. 3, 2021, 5:22 p.m. Insulation and soundproofing 1 Responses

Can I spray foam insulate from the outside?

...board and batton siding? Thank you, Kurt Are you not expecting to see some sort of sheathing behind the siding? In order to spray foam properly from the outsi...

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

How do you insulate concrete basement walls and avoid mould?

I have seen pictures of 1.5 inch Rock Wool covering the entire basement walls. Then the stud framing goes on. Then additional bats or Rock Wool boards installe...

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

What's the best way to seal a crawl space and insulate?

...board on the block wall and sealing the rim joists. But does the batt insulation stay or go if I do that? Will that help with humidity throughout the home? Will...

Posted by Steven Johnston Feb. 23, 2021, 12:35 p.m. Crawl spaces 1 Responses

Can you spray foam a house from the outside?

I live in Calgary, Alberta. My house is a 1940s bungalow with a second storey added in 1988. We are replacing the vinyl siding with Hardie Board, and want to i...

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

Is EPS or XPS better for use in basement rim joists? Should faced or unfaced foam boards be used?

...boards for installation in my basement rim joists, should I be looking for faced or unfaced foam boards to install there--and which surface of the boards (faced...

Posted by Thomas Dispenza Sept. 8, 2019, 12:43 a.m. Basements improvements 6 Responses

What is the best method of building a slab on grade?

...board under the exterior of the slab, Tpye III EPS foam under footings and a skirt of R8 insulation extending out 4 feet. ARe these suitable for such conditions...

Posted by Jay Law April 19, 2021, 3:09 p.m. Slab on Grade 1 Responses

Should I put foam boards right against my basement wall or leave an air gap?

...board to the inside of the wall or leave a gap for air? I understand mold will not grow on the board but I am afraid that there are very small cracks in the mor...

Posted by Elijah Hargett Jan. 9, 2021, 5:31 p.m. Foundation and basement improvements 4 Responses

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

...Board 80 option too. Would it work to use a self adhering WRB, on the sheathing and then insulate with 8" of Rockwool Board or is there too much potential of co...

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

How do you best use polyiso insulation in a basement?

Polyiso foam board : fiber faced (white) (IKO Therm 3) or the older product, Organic faced (gray) polyiso. Both products have visible 2mm (+/-) holes in both s...

Posted by Iain Matheson Jan. 24, 2020, 7:45 p.m. Basements improvements 1 Responses

Is spray foam a good way to insulate a house from the exterior?

...Board board and batten rain screen. However, the contractor can also remove the sheathing down to the studs and reinsulate first. He reccomends 2lb closed cel...

Posted by Simon Levitt Dec. 21, 2020, 2:14 p.m. Wall assemblies - renovation 1 Responses