Foam insulation / Discussions

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

...foam insulation so the slab will retain some passive solar heat from the south facing windows in winter, avoiding having to put too much heat in to keep stuff f...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

Do frost lines where studs are on a wall show a failure of spray foam insulation?

...foam insulation has failed? It's hard to ever weigh in on a problem with complete confidence without seeing a project or knowing the full wall assembly, but if ...

Posted by Gerald Crozier July 22, 2019, 10:24 p.m. Insulation and soundproofing 1 Responses

Can Rockwool be installed over Type II EPS?

...insulation – The difference between Polyiso, EPS & XPS Foam Insulation & Styrofoam Sometimes adding XPS or EPS rigid foam to the outside of a house can caus...

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

What is the best foam board insulation under drywall

...insulation. I would like to replace with R15 Rockwool and about 1" of foam board insulation attached to the stud and seams taped. Then I would set 1/2" drywall ...

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

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

...foam external insulation, should Therm Insulation or Stainless screws be used? Is it necessary to have the double thread design of ThermInsulation screws when i...

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

Posted by Linda Martin April 6, 2020, 11:54 a.m. Slab on Grade 1 Responses

Spray Foam for basements, which of the different types are best environmentally?

...foam insulation in general for basement conversions and which spray foam would be best for environmental reasons to help us make a decent choice. Thanks! Insula...

Posted by Rose Adams Jan. 9, 2020, 9:33 a.m. Insulation and soundproofing 1 Responses

How do you insulate a cathedral ceiling?

...foam insulation. My walls are double 2x4 stud walls 12 inches deep and will have 2-3 inches of closed cell spray foam insulation to create a air and vapour barr...

Posted by Raoul Lions Oct. 19, 2019, 8:07 a.m. Roof assemblies - new construction 1 Responses

Can I spray foam insulate from the outside?

...insulation. After applying spray foam what is best to apply (tyvek vs. something other) before installing the new board and batton siding? Thank you, Kurt Are...

Posted by Kurt Klischuk June 6, 2019, 8:56 a.m. Wall assemblies - renovation 1 Responses

Can you spray foam a house from the outside?

...Foam Insulation That Don't Cause Climate Change Spray foam insulation (or SPUF) would act as the air barrier , and as long as you have at least 2 inches it wo...

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?

...foam insulation at about 1 inch thick will act as a vapour barrier, EPS foam insulation will start to act as one at about 2 inches, and polyisocyanurate (the on...

Posted by J. Ferguson Nov. 15, 2017, 10:34 a.m. Wall assemblies - renovation 7 Responses

How do you remove moisture and condensation from basement walls?

...insulation is wrong and the insulation and the plastic barrier are creating the issue. What should be done to remedy this? Replace insulation with foam insulati...

Posted by Aaron Keating July 27, 2019, 4:51 p.m. Basements improvements 3 Responses

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

...insulation was added on one of the walls (all others checked and fine) condensation is building up after I waited a month or so into winter and pulled the insul...

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

How do you attach exterior siding without affecting the air barrier on a passive house?

...foam, for additional insulation, and siding over the foam. I'm unsure how to attach anything to the "Zip system", without penetrating the airtight barrier. ...

Posted by Scott Bowker July 16, 2018, 11:07 p.m. Wall assemblies - new construction 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

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

Should a Vapor Barrier be installed over Exterior Grade Plywood?

...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 problem w...

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

What do I in my basement where new insulation meets old?

...insulation types? (Old Poly vapour sheet and fibreglass insulation vs new Rockwool and EPS) How do address the areas where the EPS is adjacent to the old insu...

Posted by Steve J July 20, 2019, 10:01 p.m. Basements improvements 2 Responses