08/21/2026
For better energy performance, homes built on piers, rooms above garages, and cantilevered bays need properly air-sealed and insulated floors.
The detail pictured here shows one way to insulate a cantilevered floor. While the rigid foam at the top of the floor assembly is optional, attention to airtightness is not. The main reason that cantilevered floors feel cold in winter is air leakage. If you need help insulating your house is the Seattle area, call WeHoneyDo.com 425-409-5823