Apply weather stripping to the door to create a seal.
How to seal attic access panel.
Apply self adhesive foam weatherstrip tape to the top edge of the stop.
If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.
How to insulate and air seal an attic access hatch.
Sealing the attic hatch or door finish up by sealing the access hatch with self sticking weather stripping.
Pray that the installer used finish nails and not say ring shank nails.
From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.
Air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch.
Use spray foam to air seal these openings if they exist.
Install weather stripping along the top of this ledge.
Carefully pull down the finish trim.
Install wood trim pieces on the ceiling side of attic access hole framing.
The trim should extend one half inch to one inch around the inside edge of the access hole forming a ledge.
The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners.
Once you have the materials you can begin to seal and insulate the knee wall access door through these steps.
Cut 1 3 boards to fit the perimeter of the opening and nail them on with 6d finish nails.