Rigid foam / Discussions

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

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

Can foam boards cause a chemical reaction?

...foam may have a chemical reaction to other plastic products when used to insulate underground. Have you heard anything about that? Rigid foam panels are a petro...

Posted by Joel Clipsham Sept. 30, 2021, 7:17 a.m. Healthy indoor air quality 1 Responses

How do you fix a moisture problem in a finished basement?

...foam insulation on basement walls is not a bad one. However, spray foam itself is a vapour barrier, so you wouldn’t need to apply a typical 6 mil polyethylene v...

Posted by Margo MACFARLANE Oct. 28, 2019, 10:24 a.m. Foundation and basement improvements 1 Responses

How do you insulate an exterior wall from the outside?

...rigid foam insulation would provide you with a vapor barrier along with being the insulation. Specifically there is a ThermalWall EPS foam panel from Legalett t...

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

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

...foam board insulation with circumscribing spray foam in each rim joist (or maybe using purely spray foam to cover each rim joist). However, I can't tell whether...

Posted by Thomas Dispenza Sept. 8, 2019, 12:43 a.m. Basements improvements 6 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 3 Responses

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

...foam or similar) similar to the ones they use all over Europe. I am looking for a pointer on where to start and find more information. Thanks, Insulating the ex...

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

What type of insulation should I put on the exterior of my new home?

...rigid insulation used on the exterior of buildings is EPS foam, there are options but EPS would be the easiest go-to, and more easily accessible, read more here...

Posted by Alex Kesheshian April 23, 2020, 12:22 a.m. Wall assemblies - new construction 1 Responses

What is the proper location of a vapor barrier in a home in New York State?

...foam insulation - is it a good green building material or potentially toxic? But if you do use it, the foam itself acts as the vapor barrier so no other would...

Posted by Michael Boice Jan. 15, 2022, 10:18 a.m. Air and vapour barriers 2 Responses

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

...rigid EPS and see if you can make it continuous with the wall insulation below it. If you install several layers of EPS it will function just like a SIP wall, t...

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

Can you use Foam boards on basement walls to stop condensation?

...foam board and still be a problem? Hoping to just be able to apply foam to regulate the concrete temps and prevent inside warmer air from touching the concret...

Posted by Chad Johnson Dec. 21, 2019, 7:59 p.m. Basements improvements 3 Responses

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

...foam or 2 layers of 4" foam board not sure which kind would be best ......or spray foam and fill the rest with rock wool....it would be nice to talk to someone ...

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

What insulation should you use to cover the ground GEODESIC Dome?

...rigid foam insulation are both suitable for below slabs, so I think you’re best with one of those.

Posted by Vincent Warwick Oct. 1, 2020, 2:09 p.m. Insulation and soundproofing 1 Responses

Should I densepack wall cavities prior to exterior insulation?

...rigid foam insulation panels from Legalett that have rails on the interior of the foam so you can attach them with short screws, then attach the strapping to th...

Posted by Gordon McNair April 13, 2021, 9:21 a.m. Wall assemblies - renovation 3 Responses

What is the best way to insulate a crawlspace to keep humidity down and stop odors?

...Rigid Foam Board What causes frost heave and how to prevent it And about venting crawlspaces, that can be a problem depending on where you live. The found...

Posted by Dave Bell Oct. 24, 2019, 3:57 p.m. Crawl spaces 3 Responses

How do you best use polyiso insulation in a basement?

...rigid board insulation is a great product, but it does have its limitations. It is more expensive than EPS rigid insulation, but it does have a higher R value. ...

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

How to reduce the rain noise from a metal roof?

...foam and EXP or EPS foam will not do much to dampen sound but things like cellulose, rock wool or even fibre glass will held dampen the transmission of sound. H...

Posted by Igal H Nov. 24, 2020, 4:57 p.m. Insulation and soundproofing 1 Responses