Seal Attic Hatch

Air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch.

Seal attic hatch.

Diy sealing the attic hatch seal trim to ceiling create air tight seal between hatch and trim. How to insulate and air seal an attic access hatch. The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners. Hardware 2 small bungee cords to seal it tight.

If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening. 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. Apply weather stripping to the door to create a seal. Pray that the installer used finish nails and not say ring shank nails.

Carefully pull down the finish trim. Remove your existing attic hatch and measure its size. The insulation will both slow heat loss and add ballast to the hatch to improve the seal at the weatherstripping. Cut four pieces of polystyrene rigid insulation about 1 2 inch smaller than the dimensions of the hatch.