Rigid foam / Discussions

How do I best insulate my century home from the inside?

...rigid board over the studs to provide a thermal barrier + Intello (or other) air/vapour barrier to allow breathing/drying + drywall (taped and painted). What in...

Posted by Merner Row Design May 12, 2021, 12:22 p.m. Roof assemblies - renovation 0 Responses

Do you need ventilation in a cold storage pantry in a high performance house?

...rigid foam insulation external to the foundation and vapour barrier. It is insulated and airtight from the remainder of the basement. My question is regarding...

Posted by Brad Sullivan April 12, 2021, 1:13 a.m. Ventilation 1 Responses

What is the best way to deal with a drop ceiling in a high humidity room?

...rigid foam insulation and then faced fiberglass batts and then plywood subfloor of the outdoor deck. The rigid foam was not sealed (no air barrier) and this p...

Posted by steve Roberts Dec. 24, 2019, 8:01 p.m. Walls and ceilings - interior surfaces 1 Responses

How do you insulate a crawlspace with dirt floor?

...rigid foam panels on the concrete block walls (2 inch) The cottage is 900 square ft. To complicate things, we have just made a 400 square foot addition on concr...

Posted by sal Bellicoso Oct. 30, 2019, 4:56 p.m. Crawl spaces 2 Responses

Can you create a passive wine cellar by insulating and air sealing a crawl space?

...rigid foam insulation, which leads to my questions: Should I put the rigid foam on the cellar side or the crawlspace side? Should I use a low-permeability...

Posted by JC Wong April 2, 2021, 6:50 p.m. Crawl spaces 5 Responses

How thick should EPS foam insulation on basement walls be?

...rigid panel it says the vapour permeablility for 1" is 0.5 perms. would using 1" panel be sufficient instead of the recommended 2"? EPS rigid foam insulation is...

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

What's the difference between EPS and GPS insulation?

...foam but you can use it anywhere you would use EPS rigid foam insulation. EPS is typically rated at abou R4 per inch where GPS is typically rated as having R5 i...

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

Can you put foil covered foam panels inside a framed wall?

...Rigid foam insulation panels And to answer your question, yes, you can put foil based rigid foam panels on the interior of framed walls in *certain* climates....

Posted by William McCart Feb. 22, 2021, 12:38 p.m. Insulation and soundproofing 3 Responses

Do frost lines where studs are on a wall show a failure of spray foam insulation?

...foam rather than a failure. The wood studs will transfer far more heat than the Spray Polyurethane Foam (SPUF) , so what you are seeing could actually be an ind...

Posted by Gerald Crozier July 22, 2019, 10:24 p.m. Insulation and soundproofing 1 Responses

What kind of foam board should I use to insulate rim joists in Wisconsin?

...rigid foam insulation, have a look there and we can discuss more if you like. The difference between Polyiso, EPS & XPS Foam Insulation & Styrofoam

Posted by Matt Kime Sept. 12, 2021, 10:31 p.m. Basements improvements 1 Responses

What is the best way to do a cottage reno adding an insulation blanket?

...rigid foam insulation. 2 inches of EPS rigid foam would be a vapor barrier, but it’s not thick enough to protect your wall properly. Have you ever heard of th...

Posted by Barton Rowe Feb. 28, 2021, 1:27 p.m. Wall assemblies - renovation 2 Responses

What is the best way to insulate my basement?

...Foam Board Insulation over the bare concrete and leave the framed walls insulated as the are? 2. Install Foam Boards over the concrete and replace the foam in...

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

Why is there condensation in between 1.5" polyiso board and roxul insulation?

...foam. In front of the wall I frame to buy for walls and insulated with Roxul insulation Batts I went to go do some electrical work today and pulled back a bath ...

Posted by Tyler Norrie Feb. 9, 2021, 2:32 p.m. Basements improvements 0 Responses

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

...rigid insulation. 1/4 " Plywood sheathing attached to the Girts, Rigid Insualtion, rain screen (Tyvek?) 2 X 4 or 1 X 4 Strapping screwed through the insulation ...

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

What do you think of Legalett Wall Insulation?

...foam product can give it a bad rap in green home building circles, but we think that EPS insulation may be the best option in the long-term, read more here – ...

Posted by Igal H Aug. 19, 2020, 3:52 p.m. Walls and Roofs 1 Responses

Can you use spray foam Insulation under a slab?

...foam polyurethane. If not, why? When building a slab on grade, EPS rigid foam insulation is the most common choice of insulation, for performance and cost . I w...

Posted by Linda Martin April 6, 2020, 11:54 a.m. Slab on Grade 1 Responses

How do you make an airtight house envelope?

...rigid foam is not something I would rely on as an air barrier, and even spray foam can sometimes shrink and crack, leaving gaps that can lead to air leakage. Ar...

Posted by Valeriy Kraydman Dec. 1, 2020, 2:52 p.m. Air and vapour barriers 1 Responses

What is the best foam board insulation under drywall?

...foam board insulation attached to the stud and seams taped. Then I would set 1/2" drywall on top of the foam and attached with long screws. Does this sound li...

Posted by Wesley Pracht Jan. 11, 2020, 8:10 p.m. Wall assemblies - renovation 1 Responses