Insulating Finished Attic Knee Walls
How to insulate knee walls.
Insulating finished attic knee walls. 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. In this case the area behind the knee wall will be uncomfortably hot or cold. Blown insulation in the knee wall and top attics.
2d extend insulation into joist space to reduce air flows. 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. Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages. 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. We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls. Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. 1a attic access door.