Exterior wall construction layout — Am I on the right track?
I am in Zone 5a (one county north of 4a) in central Indiana. We are currently building a home and detached garage. We will be building the garage first and living in it while we construct the house.
I want to apply some green building techniques to the garage as a “test run” for the house. Please comment on my design:
2″ XPS under slab with radiant heat, 2″ XPS on exterior and basement walls.
Exterior walls (from interior to exterior) will be 1/2″ drywall, 2×6-16″oc with 3 1/2″ batt insulation over 2″ open cell foam, 7/16″ osb sheathing, 3/4″ T&G XPS, “HardiWrap”, Hardi-Plank siding.
Roof: (from interior to exterior) will be fiberglass batt to fill rafter cavity over 2″ open cell foam, 7/16 OSB sheathing, 2″ XPS, 7/16 OSB sheathing, 30# felt, with “Ice&Water shield” eave, asphalt shingle or standing-seam metal roofing.
I realize that the garage will not be as tight as the house but we want to use similar techniques.
Thank you for your input.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part