Foam board / 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

Should I install a poly moisture barrier before the rigid foam board against a basement wall?

...foam board insulation held in place with the special plastic pegs (since the poly will not allow adhesive to affix it to the wall), blue sheathing tape on foam ...

Posted by DONandCATHY Crenna Dec. 14, 2020, 2:21 p.m. Basements improvements 3 Responses

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

...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

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, 12:34 a.m. Basements improvements 6 Responses

Is it OK to put 1 inch of EPS under vinyl siding with no wall insulation?

We have a cabin in the Bershires of Massachusetts ceilings and floor have been insulated, dense pack celluose in ceilings 4 in Amivic graphite EPS under floors...

Posted by Roger Smith Nov. 12, 2019, 6:34 a.m. Wall assemblies - renovation 7 Responses

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

...board insulation glued to the wall with adhesive and I left a half inch Gap all around the board to spray foam. In front of the wall I frame to buy for walls an...

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

Can you install foam boards directly against basement walls?

...foam to Install two inches of rigid insulation board directly against concrete. A mold expert told me to put the board on top of the framing, not directly onto ...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 15 Responses

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

...foam 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 unde...

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

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

...foam 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...

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

Can you spray foam a house from the outside?

...Board, and want to improve the insulation at the same time. Right now there is 1/2" rigid foam with foil directly under the siding. Someone recommended removing...

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

Can I spray foam insulate from the outside?

...foam what is best to apply (tyvek vs. something other) before installing the new board and batton siding? Thank you, Kurt Are you not expecting to see some so...

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

How do you insulate an exterior wall from the outside?

...board and batten on one wall. We want to insulate this wall (currently, there's literally no insulation in it). I spoke to a spray foam contactor, but they were...

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

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

...board sliding them in behind the studs and directly to the concrete wall will this stop the condensation or will it just build up on the inside of the foam boar...

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

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

...foam 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?...

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