Slowly working through the results of the Thermal audit. So far we can tell that the Arctic Tern windows and doors are 100% tight, our FRP extrusions and panels are thermal transfer free! Only after 3 hours of +30C inside, we could see some thermal changes within the walls. This doesn't mean its a bad thing. It's just that we could see the interior cabinets "shining" through. The FLIR thermal imaging camera is a very impressive piece of kit! I touched the outside of the camper "by accident" and we could see my hand print for almost an hour after as a thermal residue. This means that even the absolute smallest differences in Temperature can be noticed.