If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the opening.
Seal attic access.
Insulate the cover with rigid foam that is glued in place or batt insulation that is mechanically fastened e g with wires and screws.
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.
Once you have the materials you can begin to seal and insulate the knee wall access door through these steps.
This way it will create a seal when the door is closed.
Use a hammer to drive nails through the material and attach it to the attic door frame.
Air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch.
The gaps between the edges of the access doors and the trim surrounding the hole allow.
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.
Carefully pull down the finish trim.
Unroll the insulation over the door.
Air seal attic access panels and drop down stairs to minimize air leakage.
Scuttle hole covers and pull down attic stairs loosely fit into the attic access hole they are covering.
Attach the rigid foam insulation to the attic side of the door.
Apply weather stripping to the door to create a seal.
If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.
From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.
Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11.
Install a gasket around attic access openings to air seal between the opening and the panel covering.
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Measure the size of the attic access door and cut a piece of insulation slightly larger than that.
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