I’d use some expanding foam if you could feel the air from the other side or see through it. You could also fill that area with silicone (which could also be used to help hold the flanged cover too.
Comment on How would you fill these gaps?
AnotherPerson@lemmy.world 10 months agoIt’s from a garage to an interior wall. I’m not sure if that would qualify as exterior or not.
Hazdaz@lemmy.world 10 months ago
Starb3an@sh.itjust.works 10 months ago
I consider “exterior” to mean one side of the wall is air conditioned/heated, and the other side is not. Therefore, an exterior wall has insulation in it. An interior wall is generally hollow.