How To Insulate An Attic Knee Wall
If you choose to insulate along the horizontal and vertical walls you have four key air sealing points.
How to insulate an attic knee wall. The ceiling and knee wall drywall will act as your air barrier. In this process most. Now that the kneewall is. The floor of the room with the knee wall is typically connected to the attic.
Keep the attic outside insulating a kneewall and the attic floor behind the kneewall is possible but tricky. The batts have to be. The best way to insulate knee walls cellulose insulation. Fiberglass batts can be installed either on the roof deck or the attic flat.
If your attic has knee walls install insulation only in the rafters above the knee wall. How to insulate knee walls 1. The specific r value for the insulation you need. Bring the attic inside insulating between the rafters simplifies the air sealing details.
Cellulose insulation is only an option when insulating the attic flat. The best approach for creating an energy efficient knee wall is to insulate well and make sure it is sealed air tight from the inside of the room. More details online 1. This is the obvious part especially if there is no insulation in them.
Cut unfaced batt insulation to fit between the floor joists in the space behind the knee wall. Sealing it air tight will prevent warm air from leaking out of the room which helps with energy savings but it also helps prevent potential moisture problems. Use an r value map to determine the amount of insulation you need. Lay each unfaced strip of insulation between the.
Behind the knee wall install batts between the ceiling joists taking care not to block soffit vents and. Assuming styrofoam vent chutes are installed rough cut a foam block to fit between the rafters.