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"Rigid foam"

Rigid foam / Discussions

What is the best way to insulate the exterior of a log home?

...rigid EPS foam. Mineral wool lets the moisture move right through it, EPS foam would be a perfect 2/3rds vapor barrier. That would be assuming you install at le...

Posted by Curtis Settergren March 31, 2025 Wall assemblies - new construction 1 response

What is the best way to install 5" of XPS rigid foam on interior basement walls?

...rigid insulation. It’s a great product; we have reservations about the climate impact as XPS foam has high green house gas emissions, but finding used stuff is ...

Posted by Sean MacDonald June 14, 2021 Foundation and basement improvements 8 responses

What is the best way to reduce humidity in a basement?

...foam strip! So - as we want to use the space in the basement, what are the suggested steps to reduce the humidity? What should we put on the uninsulated floor a...

Posted by Robert J. Pierson Oct. 17, 2019 Basements improvements 2 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 indi...

Posted by Gerald Crozier July 22, 2019 Insulation and soundproofing 1 response

Should you put insulation on the outside of a cinder block wall in a desert?

...foam board then tar board chicken wire then stuco then paint with elastromeric/ sand mix, all to keep out heat. Styrofoam or no Styrofoam is the question. is it...

Posted by Michael Apodaca March 9, 2020 Wall assemblies - renovation 1 response

Should a Vapor Barrier be installed over Exterior Grade Plywood?

...Rigid Foam insulation.  In the future I may add A/C to the cottage.  Do you believe a Vapor Barrier to be necessary?  Thank-you Michael Vapor barriers can be a ...

Posted by Michael Klauck March 6, 2020 Air and vapour barriers 1 response

How do can I insulate an existing basement floor from 1906?

Old house; basement is only 21% of total under house footage. 79% is crawl space. Basement Never painted. Walls go up 4 ft to a 2ft wide ledge and then the old ...

Posted by Cathy Gaskins Feb. 18, 2021 Basements improvements 3 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 Wall assemblies - renovation 1 response

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 Basements improvements

Can basement walls to dry to the inside with foam board?

...foamboard to my basement foundation walls. From all of my reading it says that your basement foundation walls can only dry to the inside. If I put foamboard on ...

Posted by Tim Hanrahan Aug. 20, 2020 Basements improvements 7 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 –  I...

Posted by Igal H Aug. 19, 2020 Walls and Roofs 1 response

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