[JAG]

I purchased different thickness of Super Sound Proofing from Aircraft Spruce. I used mostly 3/4" thick, and cut to fit into all the spaces. I would put a bit of contact cement on the backs to hold them in place to keep them from vibrating out. Easy to remove if you have to do any inspection (but the way it installs on the skin panels, you can still inspect all primary structure, wiring and cables), and since they are closed cell foam, won't hold moisture and cause corrosion.

I did not insulate for the cold, rather from the heat since I live in Texas. Product is easy to work with (buy a cheap electric carving knife) and I really enjoyed installing it. May not be the best insulation - but provides some noise attenuation, some insulation, and is very clean looking and easy to work with.

Jeff