Install weather stripping along the top of this ledge.
How to seal attic access panel.
Carefully pull down the finish trim.
Cut 1 3 boards to fit the perimeter of the opening and nail them on with 6d finish nails.
If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.
The access panel will rest on this trim.
From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.
Apply self adhesive foam weatherstrip tape to the top edge of the stop.
Seal the attic access weatherstrip the attic access hatch or door.
How to air seal attic access panels.
Once you have the materials you can begin to seal and insulate the knee wall access door through these steps.
Install wood trim pieces on the ceiling side of attic access hole framing.
Sealing the attic hatch or door finish up by sealing the access hatch with self sticking weather stripping.
The trim should extend one half inch to one inch around the inside edge of the access hole forming a ledge.
Air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch.
Apply weather stripping to the door to create a seal.
How to insulate and air seal an attic access hatch.