Insulating Knee Wall Closet

Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages.

Insulating knee wall closet.

Insulating this space inside the knee wall improves the energy efficiency of the home and prevents heat transfer from the attic. Third many side attic knee wall areas are very restrictive in accessiblity and working height. 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. We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls.

1 use an r value map to determine the amount of insulation you need. Knee wall doors provide access through the knee walls to the unconditioned parts of the attic. But you do so at the expense of floor space. The best materials for the attic and thus the knee wall are spray foam fiberglass and cellulose.

This makes is extremely difficult to install a rigid thermal barrier over the stud framing. I suggest installing horizontally stacked r 19 unfaced fiberglass batt insulation across the back side anchored to the studs and then covered from roof. Insulating and air sealing knee walls unvented version. We prefer cellulose but we use fiberglass sometimes too.

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. The higher the knee wall the greater the amount of useful wall space you create in your finished attic. Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. Framing basics for attic knee walls along the sides of your loft or attic space.

Support and follow me. The disadvantage is that it would be very very hard to reach the desired r value from r 49 to r 60 depending on climate for attic insulation. You can buy knee wall doors that have built in insulation and weather stripping. A knee wall is a short vertical wall roughly two or three feet high that blocks in that useless triangular space.