"Andrew Barss" wrote:

I'm looking for advice and ideas for improving energy efficiency in
my house,
especially heat from the roof and attic.
snip


As the old saying goes, "Advice is usually worth what you pay for it."

As someone else suggested, contract with a reputable firm and have a
total energy audit performed.

It will cost a few $, but it will save many times that cost.

Otherwise you are flying blind.

Lew