|
Foam ?
I'm assumming your talking about expandable foam (the stuff in a can that is used as an insulator.
However,
I've never seen this material on any additional materials list. The only foam I ever remember that was legal was the rhocell (spelling) we were given years ago.
I don't think you could legally fill copper tube with foam besides, we usually don't have that much copper tube (10' max) to work with.
Go with extruded aluminum. You'll never look back and regret it.
|