Insulating Finished Attic Knee Walls

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.

Insulating finished attic knee walls.

1a attic access door. Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. Unlike traditional walls with two finished sides. The sloped roof creates a small space that can hardly be use.

In this case the area behind the knee wall will be uncomfortably hot or cold. We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls. Although kneewalls can help turn attics into living space they often present insulation challenges most builders install fiberglass batts between the studs and some type of blown insulation between the floor joists. How to insulate knee walls.

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. Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages. We prefer cellulose but we use fiberglass sometimes too. Knee walls are half walls built into areas where a full sized wall will not fit such as finished attic crawlspaces.