Insulating Knee Wall Closet
Insulating and air sealing knee walls unvented version.
Insulating knee wall closet. The advantage here is that your knee wall is probably already insulated this way so it s just a matter of buying some foam so cheap. 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. Third many side attic knee wall areas are very restrictive in accessiblity and working height.
Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages. The higher the knee wall the greater the amount of useful wall space you create in your finished attic. I suggest installing horizontally stacked r 19 unfaced fiberglass batt insulation across the back side anchored to the studs and then covered from roof.
The best materials for the attic and thus the knee wall are spray foam fiberglass and cellulose. When it comes to insulating knee walls you will want to insulate this space using the same material and method as the rest of your attic. Blown insulation in the knee wall and top attics. Support and follow me.
Framing basics for attic knee walls along the sides of your loft or attic space. If the door doesn t have these weather strip it to provide a tight seal and make sure the latch pulls tightly against the frame. 1 use an r value map to determine the amount of insulation you need. We prefer cellulose but we use fiberglass sometimes too.
Knee wall doors provide access through the knee walls to the unconditioned parts of the attic. Insulating this space inside the knee wall improves the energy efficiency of the home and prevents heat transfer from the attic. This makes is extremely difficult to install a rigid thermal barrier over the stud framing. But you do so at the expense of floor space.