Lighting – Air Seal recessed cans without attic access

insulationrecessed-lighting

I recently discovered moisture in my attic and the mold inspector recommended sealing all the canned lights in our house. We have about 30 in vaulted ceilings where there is no attic access.

Any tips on how to seal the fans from below?

For reference. House in in Seattle, built in 2008. Canned lights are IC air tite halo models. I was surprised that they leak air as they are air tite. But I can imagine given its not sealed like our bathroom recessed lights and closet recessed lights that have a glass cover and gasket.

If I take the baffle off the unit is metal and there are some screws and such.

Do I just caulk the can to the Sheetrock around the opening and then form or tape the crevices using duct tape?

Best Answer

Your best option is to caulk the can's rim to the ceiling drywall and then replace the bulb with a drop-in LED replacement. These things are self-contained units that seal off the air leakage paths themselves, and you can caulk them to the housing too for extra assurance.