Insulation boards are rigid boards or sheets made of foamed polystyrene, polyurethane, polyisocyanurate, or gypsum. Their rigid, closed-cell structures provide better insulation compared to ...
Heat rises, and this one isn't too hard to ... Double up thick styrofoam insulation boards, attach them to the inside of your attic door, and seal the edges with weather stripping.
You should also consider purchasing thermal insulation boards for the doors. Once we identify the source of leakage, expanding foam can be helpful. It is applied to the door frame and all the gaps.