Insulating Dormer Attic Space

Do dormer bungalows and houses with attics in the roof space need a different approach to insulation.

Insulating dormer attic space.

Do not insulate the dormer s ceiling when it connects to an uninsulated attic space. Dormer roofs are roofs that contain rooms and can present considerable challenges when it. Measure the dormer s ceilings for insulation with the tape measure if needed. This can be done with spray foam or rigid foam cut to fit between rafters and foamed in place with a foam gun.

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. 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. There are two basic ways to insulate a finished attic. Cut the ceiling s batt insulation to size with the knife.

If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. In this case the area behind the knee wall will be uncomfortably hot or cold. 1a attic access door. If the attic kneewall spaces are used for storage then you ll have to insulate along the roof slope down to the eaves and create an air barrier at the rafters.

Rigid insulation the rigid insulation method requires the utilisation of 150mm thick insulation in between the rafters along with a 50mm air gap in order to avert cold bridging.