Thanks for the replys. I'll check with my local Borg to see if they
have those. Otherwise I'll have to check with my local electrician
supply houses to see if they carry these.

Jim

Rudy wrote:
I have a ceiling mounted fans or light fixtures in most of the rooms
around the house, and there are gaps around the boxes. I know I can
caulk/foam these gaps but what about all the individual holes in the
boxes themselves? The boxes are a mix of metal and plastic boxes.
Can I lay some poly sheet over the box and lay the insulation
over/around it? I hesitate to do this because at least 2 of the
fixtures are mounted directly to the boxes (not ceiling fans or pendant
lights) and there might be heat build up.

Instead of plastic sheet, there are clear plastic vapor barrier 'boxes'
that you can get to cover over these metal boxes. They re designed to keep
the insulation from lying directly on the box yet will effectively seal the
air infiltration. You may have to slice them open along one side to get
them to wrap around the romex wires entering the box, you can then tape up
the cuts you made with red "Tuck" tape and replace the insulation.