Discovered that the attic access hatch isn’t insulated, which honestly isn’t surprising given when it was built. No ladder system. I’m working on cutting up some foam boards to glue to the backside. Hopefully it will reduce how much is radiated through this barrier.
FLIR one/3 android got delivered today, again thank you for the recommendation! Got it as Amazon warehouse/returns purchase for EUR 89 in mint condition, quite a steal. Now emptying its battery making pics of the pets (kinda spooky), doorframes, windows…