Walls and Roof

Subslab assembly

3-inch-thick bed of closed-cell spray foam

Slab edge assembly

Insulated ICFs

Slab edge R-value 22.0
Foundation wall assembly

Insulated ICFs

Foundation wall R-value 22.0
Above grade wall assembly

ICF walls 11.25-inch-thick ICF walls, consisting of a 6-inch concrete layer sandwiched between
two layers of EPS rigid foam

Above grade wall R-value 22.0
Flat attic assembly

12 inches of foam (2 inches of closed-cell spray foam, then hybrid open-cell spray foam)

Flat attic R-value 60.0

Windows and Doors

Average window U-factor 0.20
Solar Heat Gain Coefficient 0.23

Mechanical Systems

Lighting Manufacturer and Model
Lighting Efficiency


Air Changes per hour, ACH50 0.28 ACH50
Air Changes per hour, CFM50