Fine Homebuilding this month says that a double stud wall with 12 inches of insulation gives you a r-40 wall, I saw no mention of how much benefit can be expected from eliminating thermal bridging. Can anyone tell me in layman’s terms how many “r”s you gain by using modified balloon framing, smart stud framing, and using a double stud wall to eliminate thermal bridging? If I’m shooting for twice the r value of energy code, does the wall really have to be twice as thick?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part