This time I didn’t need the builder to confirm anything. The vent pipe was visible (due to an improperly installed fire-stop) in the attic, and you can see that it’s in contact with the drywall.
Nice catch.
Your IR image reminds me of one of my IR inspections, where there was a heat pipe behind a plaster wall.
Jeff that pic of the vent looks like single wall snap-lock???
No, I was able to verify that it is indeed a B-vent. . .
Sorry I was looking at the seam we don’t use Class B here with a seam.