Seal Attic Hatch

From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.

Seal attic hatch.

Cut four pieces of polystyrene rigid insulation about 1 2 inch smaller than the dimensions of the hatch. Hardware 2 small bungee cords to seal it tight. The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners. Pray that the installer used finish nails and not say ring shank nails.

Carefully pull down the finish trim. The insulation will both slow heat loss and add ballast to the hatch to improve the seal at the weatherstripping. If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening. Remove your existing attic hatch and measure its size.

2 thick foam board 4 8 sheet with an r value of 10 or greater 15 foam weather stripping the wider the better 1 can great stuff foam or similar 1 tube liquid nail or other construction adhesive 8 16 penny nails misc. How to insulate and air seal an attic access hatch. Diy sealing the attic hatch seal trim to ceiling create air tight seal between hatch and trim. Apply weather stripping to the door to create a seal.