9
Hot take: People are using the wrong insulation in their garage conversions.
Kept seeing frost on the inside walls of my converted garage in Mill Woods last winter. Realized everyone just uses standard batts against the concrete, but you need a proper vapor barrier and rigid foam first. Anyone else fix this cold spot issue?
2 comments
Log in to join the discussion
Log In2 Comments
brian_murray1mo agoOG Member
Spot on about the rigid foam. You gotta treat that concrete like an outside wall. I used two-inch thick XPS foam board sealed with tape, THEN put my stud wall with batts in front of it. That air gap people leave is a total cold bridge.
8
daniel_martinez841mo ago
Yeah, that air gap thing is such a trap. I learned the hard way on my own basement. Left a gap behind the studs thinking it would help with moisture, but all it did was make the whole wall feel cold. My energy bill that first winter was brutal. Sealing the foam board tight to the concrete like you did makes all the difference. It just stops the cold right at the source.
7