Exterior wall insulation / Discussions

Is Drywall needed for under T&G on a wall?

...walls with.  Do I need to install drywall on those walls prior to installing the T&G?  The walls in question are exterior walls, they are 8" poured concrete, with a 1/4 foam board (because they were pre-studded) then batt installation.  The exterior walls are exposed on the outside.  I run a dehumidifier during sum...

Posted by Chris B April 25, 2023 Walls and ceilings - interior surfaces 1 response

Is spray foam a good way to insulate a house from the exterior?

...insulation.  I don't really like the potential for harmful offgassing, but because we will not remove our interior drywall, I don't really know how we can air seal / vapor seal behind the drywall - this seems neccesary for other types of insulation. Does anyone have experience with re-insulation from the exterior of th...

Posted by Simon Levitt Dec. 21, 2020 Wall assemblies - renovation 1 response

What is the perfect wall assembly?

...insulation on the exterior of a Passive House. And another that makes a lot of sense is ThermalWall exterior insulation panels from Legalett. They are made from EPS foam, and they have a metal rail in the middle of the panel that is used to attach them. What you do is remove the ‘snap track’ of insulation, fasten the ...

Posted by Paul Drouin Sept. 17, 2020 Wall assemblies - new construction 2 responses

Is it a good or bad idea to spray foam directly on the interior of shiplap siding?

...wall assembly? I don’t quite understand how you would get the insulation onto the siding unless this is a cottage with open stud walls so you see the back of the siding from inside the house. But the short story is – walls need to be able to dry, and I don’t see how they will if you spray foam the back of the wood. Ext...

Posted by MITCHELL KOCH Aug. 21, 2020 Exterior cladding 1 response