Insulating Dormer Attic Space

2d extend insulation into joist space to reduce air flows.

Insulating dormer attic space.

In this case the area behind the knee wall will be uncomfortably hot or cold. There are two basic ways to insulate a finished attic. Measure the dormer s ceilings for insulation with the tape measure if needed. In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above.

Dormer roofs are roofs that contain rooms and can present considerable challenges when it. In case the space on the existing rafters is not enough you can fix a batten to the rafters underside in order to enhance the depth. Cut the ceiling s batt insulation to size with the knife. If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space.

Staple the dormer s ceiling insulation s flaps to the roof trusses with the insulation s paper backing facing down. Do not insulate the dormer s ceiling when it connects to an uninsulated attic space. This can be done with spray foam or rigid foam cut to fit between rafters and foamed in place with a foam gun. 1a attic access door.

If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.