Vented Attic vs Spray Foamed Rafters
The CC Spray Foam quote came in for the whole house and my God, it’s high. Part of the quote was over spraying the 6″ rafters in my attics to take care of thermal bridging.
But two of my attics are already vented. I suggested we keep them so, but with proper baffles, air sealing and insulation values with new insulation. If we go this route and with budget in mind, should we use blown in cellulose and/or rock wool or FG batts laid perpendicular to each other stacked to attain the proper R-Value?
My GC hates cellulose but he’s not paying the bills. ; )
GBA Detail Library
A collection of one thousand construction details organized by climate and house part