Board / Discussions

What is the best foam board insulation under drywall?

...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 like a ...

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

Is polyiso board or styrofoam best for insulating when finishing a basement in CO?

...boards I have a few questions that will help us pin down the best way forward for you - How old is the home? Is there an exterior membrane on the basement w...

Posted by Evan B. Nov. 21, 2019, 8 p.m. Basements improvements 1 Responses

Why is there mold on particle board outside vapor barrier on new addition?

...board. The house had air conditioning going all summer. The mould is on the particle board on the south side of the house. I have had the building inspector and...

Posted by Christine ML June 7, 2020, 1:35 p.m. Wall assemblies - renovation 1 Responses

Which type of exterior insulation to use on a house?

...board type of material on the exterior rather than OSB (I'm assuming the builders saved a few dollars by using such a bad material?) There is old aluminum sid...

Posted by Trevor Marshand May 26, 2020, 1:16 p.m. Insulation and soundproofing 1 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

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

...board 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 the ...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 3 Responses

Can you install foam boards directly against basement walls?

...board directly against concrete. A mold expert told me to put the board on top of the framing, not directly onto the concrete wall so the house can breath. What...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 4 Responses

Can you use polyiso insulation on the exterior of a wall behind cedar siding on the west coast?

...board loose its thermal properties? Does it go below R4.5 per inch? Is it usless at -15C ? or equal to XPS ? Polyiso starts to fall off in R value around 5-10C ...

Posted by Iain Matheson Jan. 28, 2020, 10:38 p.m. Wall assemblies - renovation 1 Responses

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

...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 wort...

Posted by Michael Apodaca March 9, 2020, 3:10 p.m. Wall assemblies - renovation 1 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

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

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

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

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 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

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

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

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