Partitian wall top plates are concealed by second layer of drywall
My home is from 1953. Even though this is a cold climate it has no insulation in the walls. I believe the original builder thought drywall was insulation enough because walls and ceiling are both two layers of drywall in full contact with eachother. I’ve been airsealing the attic floor. I’ve been plugging away at the exterior top plates, lights, etc.. however the partitian wall top plates do not come up to the second layer of drywall on the attic side. I figured the walls were either raised after the ceiling went up (sealed up then!) Or the went through the 1st layer and then covered over by second layer (sealed up then too!) Win / win situation, ya? Nope. Attempted diy blower test with flir c2 thermal camera. I was surprised to see the creeping tendrils of cold air inflirtration at those top plate areas. What can I do about that? Google has 0 hits for this situation.
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