Key Features: Walls: R-52 double-wall with 2×6 24″ o.c. outer wall, 2×4 24″ o.c. inner wall for 12″ cavity with 3″ closed-cell spray foam plus 9″ blown fiberglass; coated OSB sheathing with seams taped, 3⁄8″ woven plastic rain screen. Poly fly ash lap, cedar, and stone siding. Roof: 6 ft ice-and-water shield at eaves; synthetic…