How To Seal A Attic Hatch

Apply a bead of caulk on the inside and outside edges of the trim and then reattach it.

How to seal a attic hatch.

The standard air sealing recommendation is to install a compression bulb weatherstrip. Plug the big holes first. Long piece from a batt of unfaced fiberglass insulation and fold it at the bottom of a 13 gallon. Seal trim to ceiling.

Pre made insulated attic stair covers are also available from local home improvement centers or on the web. Near finished attic hatch. Create air tight seal between hatch and trim. Air seal the hatch perimeter the plywood hatch rests on a small wood strip lip.

If you have pull down attic stairs or an attic door these should be sealed in a similar manner. Weatherstrip the edges and put a piece of rigid foam board insulation on the back of the door. My apologies for the lack of photos but you can surely imagine how it works. Cut a piece of fiberglass or rigid foam board insulation the same size as the attic hatch and nail or glue it to the back of the hatch.

Once you have the materials you can begin to seal and insulate the knee wall access door through these steps. Wrap insulation in plastic. This can also be beefed up to a sealing gasket like the one on your refrigerator door. There are two issues that need to be addressed with the attic hatch.

Air sealing involves two steps. Apply weather stripping to the door to create a seal. To guarantee a good seal i paired sash locks with a gasket of foam weather stripping around the frame of the attic hatch. From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.

When the sash locks are rotated in use they form an air tight seal with the foam weatherstripping.