Foam / Discussions

Can you spray foam a house from the outside?

...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 holes a...

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

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

Can I spray foam insulate from the outside?

...foam properly from the outside you would need to see bare studs, and spray foam in the stud cavities. So that would leave you without sheathing, so you would ne...

Posted by Kurt Klischuk June 6, 2019, 8:56 a.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

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

...foam - with the added benefit of making sure that at least 2" of foam has zero possibility of getting moisture back in once the concrete slab has dried out beca...

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

Can you install foam boards directly against basement walls?

...foam boards against the wall THEN the stud wall, you don't want to have organic material exposed to moisture, particularly having a source of moisture on one si...

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

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?

...foams available some of which mention climate change and environmental concerns - but we're wary of greenwashing, so I would value your opinion as to spray foam...

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

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

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 Foam boards on basement walls to stop condensation?

...foam board and still be a problem? Hoping to just be able to apply foam to regulate the concrete temps and prevent inside warmer air from touching the concret...

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

Protection from Insects for Legalett Geo-passive super insulated slab on grade?

I've already contacted Ecohome about a quote for a full turnkey eco-habitate s1600 for where I am here in Nova Scotia. But one concern I have about the Legal...

Posted by James Burns April 30, 2020, 11:11 a.m. 0 Responses

Is it OK putting 1 inch of EPS under vinyl siding with no wall insulation good?

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

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?

Do you have any advice with spray cork renders vs. fully insulating the outside of our home with rockwool or foam board and new siding. We need a cost effectiv...

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

is a double vapor barrier on a South Florida roof bad?

I am building a new home in Naples Florida with a metal roof and open cell foam sprayed on underside of roof deck. I am considering a peal and stick membrane...

Posted by Arthur Moore April 6, 2020, 12:57 p.m. Roof assemblies - renovation 0 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