Cold spots near wall edge
Any ideas what could be causing these large cold spots on thermal imaging? The picture shows the edge of an upstairs room. In the attic above, there is visibly plenty of insulation in these spots. There is batt insulation with blown in fiberglass on top of it. The baffles are Styrofoam and go from edge to edge between the trusses. There are a gaps at the bottom of the baffles and the top plates that is stuffed with rolled up fiberglass batts acting as a plug to block the blown in from falling into the soffit.
The edges of the walls in the rest of the upstairs all look fine. It’s just this one wall with multiple “problem” areas. The only thing that is different on this wall is the baffles have fiberglass plugs at the bottom. The remainder of the house has cardboard baffles that fold down onto the attic floor, so no plug is required.
Is air just blowing through the fiberglass plugs and rendering the insulation in these areas useless?
Posted Mar 1, 2026, 2:28 PM UTC