If I have a gambrel style roof, with 10/12 pitch on the lower, and 4/12 on the upper. Should I consider the lower part walls, since they are the sides of the building? If so, what do I need for R value?
On the upper part, is it OK to foam the roof rafters (with soffit to ridge venting), and then use fiberglass or foam board on the top of the ceiling below? Or is it better to apply the foam board right on the rafters?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part