"Kompu Kid" wrote in message
I looked at the archives of this usenet group, and found discussions
on using foam blocks under the composite shingles. This seems fine
but it seems like it is like building a new roof, which could be
expensive.

If you happen to need a roof, that is probably the best way to go. You can
buy foam laminated to osb for roofing.




- Add foam from within in between the rafters and blend them with the
architecture.

Second best.