Rigid foam / Discussions

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

...rigid XPS 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 tap...

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

What is the best exterior rigid foam insulation for under a deck?

...foam panels, we would recommend EPS rigid foam instead of XPS as it is cheaper and less environmentally harmful, read more here about the performance and charac...

Posted by Andrew Cherubini March 21, 2021, 9:02 p.m. Insulation and soundproofing 3 Responses

Can you add exterior rigid foam insulation (e.g. EPS) with replacing windows?

We are contemplating an energy retrofit to several 1960's chalet style cabins in Northern VT. Budget matters and the windows of the cabins are in reasonably de...

Posted by Peter Milliken Nov. 9, 2020, 9:13 a.m. Wall assemblies - renovation 0 Responses

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

...foam glued to concrete then wood glued to foam will last. The stud wall can be screwed to the ceiling and the floor, which makes the foam adhesive obsolete on...

Posted by Sean MacDonald June 14, 2021, 10:42 a.m. Foundation and basement improvements 8 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

Heco topix screws - which type should be used for attaching insulation outside a house?

Attaching battens through 4" EPS foam external insulation, should Therm Insulation or Stainless screws be used? Is it necessary to have the double thread desig...

Posted by Mike Taylor April 7, 2020, 4:45 p.m. Materials and resources 2 Responses

Can Rockwool be installed over Type II EPS?

...Foam Insulation & Styrofoam Sometimes adding XPS or EPS rigid foam to the outside of a house can cause problems since it can trap moisture. That said, it is m...

Posted by Brian Bonnell March 30, 2020, 11:04 a.m. Wall assemblies - renovation 1 Responses

Do you have an updated recommendation for attaching exterior mineral wool insulation?

...rigid foam insulation panels ThermalWall is an EPS rigid foam panel with a metal rail embedded in the middle of the panel allowing it to be attached to the exte...

Posted by Fred D Aug. 31, 2020, 1:07 p.m. Wall assemblies - new construction 1 Responses

Can you install foam boards directly against basement walls?

...rigid 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...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 16 Responses

Has anyone insulated under a swimming pool?

...rigid foam boards under 6-7000 gallons of water to keep the ground from sucking the heat out of the pool. Haven't found anyone that has done this, would rigid f...

Posted by Randy Parent May 10, 2021, 8:28 p.m. Natural swimming pools and ponds 1 Responses

What is the best way to insulate a 1930s brick house from the outside?

...rigid foam installers and I have a quote for 2 inches of rigid foam Isoshield sheets (total of R10) with Hardie siding applied on top of that. To answer your ...

Posted by Stephane Marcotte Sept. 2, 2021, 2:42 p.m. Wall assemblies - renovation 2 Responses

Can you spray foam a house from the outside?

...rigid foam with foil directly under the siding. Someone recommended removing the sheathing and doing spray foam from the outside. It seems we could also drill h...

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

I want to insulate the outside of my house, which type of insulation do you think is best?

...rigid foam panel and I don't want to choose the wrong one, which do you recommend and how much will I need? Thanks, Michael. When I drive by houses doing exactl...

Posted by J. Ferguson Nov. 15, 2017, 10:34 a.m. Wall assemblies - renovation 12 Responses

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 pro...

Posted by Michael Klauck March 6, 2020, 1:24 p.m. Air and vapour barriers 1 Responses

Should I put insulation on the exterior of a brick house?

...foam the interior and then clad the exterior with hardie board. I'm considering adding 1" of rigid EPS or GPS insulation under the cladding. I'm trying to dec...

Posted by Andrew T Oct. 3, 2021, 7:03 a.m. Wall assemblies - renovation 1 Responses

What is the best material to use on top of plywood for water proofing?

...Rigid Foam, Delta Dry etc. For help choosing a weather barrier for the exterior of a home see here – Choosing a house wrap, which is best? In our 2015 LEED ...

Posted by Babak K July 27, 2020, 12:22 a.m. Air and vapour barriers 3 Responses

What is the best method of building a slab on grade?

...rigid board under the exterior of the slab, Tpye III EPS foam under footings and a skirt of R8 insulation extending out 4 feet. ARe these suitable for such cond...

Posted by Jay Law April 19, 2021, 3:09 p.m. Slab on Grade 1 Responses

What is the best way to install basement insulation with existing framing?

...foam either but if I need a membrane against the block, I don't see much of a choice, other than knocking down all of the walls, putting up a rigid foam membran...

Posted by Nick Trotta Sept. 20, 2021, 8:29 p.m. Foundation and basement improvements 7 Responses