How can you tell if your insulation and air sealing is effective?
On this cold morning there was a frost on the roof. And where heat was getting through, you could see the frost melted. I caught this shot this morning after it was noticed a week earlier.
So what is going on here?
The melt spots are where the hallway wall meets the top of the sloped ceiling and the flat ceiling on the 2nd floor. On further inspection, I found that the top plate of this wall actually penetrates the plane of the slope, where on the other side there is no wall and no melted areas.
I also found some air leakage where a piece of tape failed to stick to the top plate.
So the next question is does a little bit of air leakage and a 4" thermal break on an 18" cellulose cavity result in this kind of heat escape or is there perhaps some gap in the cellulose? The installer did check this area with an IR camera, but it was done when we had a much smaller stove and not a large of a temp difference as we currently are running.
What do you think?
I will follow up as we get to the bottom of this one.
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