I've spent the afternoon insulating the rim joist bays around my
basement. I'm filling the bays with R-19 fiberglass insulation, but
I've got a 10' section that I'm having trouble with.
I'm currently working on the side of the basement where the rim joist
runs parallel to the floor joists and for the most part it's open and
easy to insulate.
However, there's a 10' section that contains 2 heat ducts and a bunch
of wires. There's really no way to get any appreciable amount of
insulation behind, over or under the ducts.
I suppose I could figure out a way to insulate the first joist bay
interior of the rim joist and seal it to the top of the block wall,
but is it OK to seal the heat ducts in the cold(er) space?
I'm not sure if it matters, but that side of the house is virtually
blocked from any wind since it is both on the primarily leeward side
of the house *and*
blocked by the house next door if the wind ever
comes from that direction.
Should I just forget about it?