How To Seal Seams In An Attic

Once you seal the air leak with caulk or expandable foam it s not necessary to replace the insulation.

How to seal seams in an attic. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. Seal the foil to the frame with the caulk or adhesive and staple or nail it in place if needed. Just put it back into place. Finish up by sealing the access hatch with self sticking weather stripping.

Sealing the attic hatch or door. If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening. Seal small gaps with caulk up to inch and expandable foam spray up to 3 inches. And sealing up a gaps around an ceiling electric box can be handled by pulling the fixture.

But sealing indirect air leaks is always a lot more difficult because there are multiple routes the air can take to reach each leak point in the attic. Finished rooms built into attics often have open cavities in the floor framing under the sidewalls or kneewalls. Activate can by pulling the trigger. The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners.

Foam should be tack free in 10 to 15 minutes. Use spray foam to air seal these openings if they exist. Apply weather stripping to the door to create a seal. From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.

Apply a bead of caulk or adhesive around the opening. Invert can and insert it into the gap around the attic hatch. Apply self adhesive foam weatherstrip tape to the top edge of the stop. Position the screw eyes so the.

If you have a finished attic seal behind the kneewalls. Once you have the materials you can begin to seal and insulate the knee wall access door through these steps.