We have a 2012 gas motorhome and the cabinets over the dash get very hot in the summer. I have thought about putting insulation board in them to try and alleviate the heat some. Was wondering if anyon...
With my coach, the fiberglass insulation had sagged which caused the front cap to get warm during the Summer months. It also meant that it was cold when we traveled during the Winter. I finally took the cabinets down and used spray urethane foam to insulate the upper front cap which finally took care of the problem. I purchased the two part foam kit from a seller on eBay and it included everything I needed including the spray nozzle. Cost was about $250 total.