Just a quick comment on insulbrite - I bought it originally for some potholders that I was making, but then also used it for some Roman shades in my East bedroom/computer room to keep out the summer sun. Boy was that a blessing in that room. Then on a trip in our RV, we realized that we were getting a lot of hot hot sun thru our skylight over the shower, and I pinned a piece up to cover the skylight - what a great move that was in keeping out "tin can" cooler! That piece needs to be taken down and given a proper cover and maybe some velcro attachments - it is still pinned up out in the RV doing it's shade thing. Anyway I'm sold on it for a variety of reasons.