Rigid foam / Discussions

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

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 7 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

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 2 Responses

What is the best way to deal with a drop ceiling in a high humidity room?

...rigid foam insulation and then faced fiberglass batts and then plywood subfloor of the outdoor deck. The rigid foam was not sealed (no air barrier) and this p...

Posted by steve Roberts Dec. 24, 2019, 8:01 p.m. Walls and ceilings - interior surfaces 1 Responses

How do you insulate a crawlspace with dirt floor?

...rigid foam panels on the concrete block walls (2 inch) The cottage is 900 square ft. To complicate things, we have just made a 400 square foot addition on concr...

Posted by sal Bellicoso Oct. 30, 2019, 4:56 p.m. Crawl spaces 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

For home renovation, is it better to install insulation on the inside or outside?

...foam, you could fill exterior cavities with batt insulation, dense packed cellulose, you could also add rigid foam panels, Rockwool panels etc, there are many m...

Posted by Neil Richardson Jan. 29, 2019, 4:09 p.m. Wall assemblies - renovation 1 Responses

How you vent a metal roof?

...rigid foam panels, followed by the drainage plane membrane? If using the Silverboard SB-35 foam insulation would be equally effective, would it be better to u...

Posted by Kim jarrett July 12, 2019, 12:15 p.m. Roof coverings 3 Responses

What is the best way to insulate the basement of an old house?

...foam acts pretty much as a type II residential vapor barrier, but I would put the vapor barrier right against the foam and do the poly on top. And as for fini...

Posted by Bryan Squirrell Jan. 14, 2020, 7:59 p.m. Basements improvements 1 Responses

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

...rigid foam for this specific purpose. As for your stairs, if there is a 2-inch gap, I would consider slipping a couple of 1.5” foam boards behind it if possible...

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

What is the best exterior Wall and Roof Rigid Insulation for a barn renovation?

...rigid insulation. 1/4 " Plywood sheathing attached to the Girts, Rigid Insualtion, rain screen (Tyvek?) 2 X 4 or 1 X 4 Strapping screwed through the insulation ...

Posted by Ron Busch June 27, 2020, 3:50 p.m. Wall assemblies - renovation 1 Responses

What do you think of insulated T Studs in Canada?

...foam. However, if the company that makes these insulated wood studs is building them in partnership with spray foam manufacturers that have changed to safer b...

Posted by Lee Watt June 3, 2019, 10:57 a.m. Wall assemblies - new construction 1 Responses

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

...foam 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...

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

Can you install foam boards directly against basement walls?

...rigid fome 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 4 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