[masraum]

Originally Posted by RWebb

close to true in Canada, where you are, but he is in Florida

his problem is heat coming from outside and trying to stop it

your problem is heat leaving from inside and trying to stop that

I live in Houston, roughly the same climate as South Florida. My attic gets hotter than hell in the summer, and brings the temp of the house up. If I could insulate my roof so that the attic doesn't get as hot, that would help. That means that the foam would be useful.

I'd heard that the reflective insulation under the roof can overheat the asphalt, but not the spray on foam, but it could be.