How To Seal Attic Access Hatch

How to insulate and air seal an attic access hatch.

How to seal attic access hatch.

If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening. Use spray foam to air seal these. The insulation will both slow heat loss and add ballast to the hatch to improve the seal at the weatherstripping. Air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch.

Weatherstrip the attic access hatch or door. Apply self adhesive foam weatherstrip tape to the top edge of the stop. Remove your existing attic hatch and measure its size. From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.

Apply weather stripping to the door to create a seal. The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners. Sealing the attic hatch or door finish up by sealing the access hatch with self sticking weather stripping. Affix foam insulation to.

Cut 1 3 boards to fit the perimeter of the opening and nail them on with 6d finish nails. Cut four pieces of polystyrene rigid insulation about 1 2 inch smaller than the dimensions of the hatch. How to seal knee wall doors. The latch should lay flush against the frame.