Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist.
Attic knee wall door insulation.
First you will want to add traditional insulation between the studs this can be batt insulation spray foam or even rigid foam insulation.
Apply weather stripping to the door to create a seal.
We prefer cellulose but we use fiberglass sometimes too.
The dwt knee wall access doors are new and highly energy efficient design.
Use spray foam to air seal these openings if they exist.
The latch should lay flush against the frame.
From inside the attic check for any openings holes or fenestrations into the knee wall surrounding area.
The problem with many kneewalls is that they have fiberglass batt insulation with nothing covering them on the attic side as shown in the photo below.
What happens then is that the batts don t make contact with the air barrier the drywall air moves through and around them and they fall out of the attic kneewall.
We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls.
Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages.
Knee walls that share space with a conditioned room in your home should have a combination of both traditional insulation and foil radiant barrier insulation.
Most builders install fiberglass batts between the studs and some type of blown insulation between the floor joists.
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.
You can buy knee wall doors that have built in insulation and weather stripping.
Although kneewalls can help turn attics into living space they often present insulation challenges.
Blown insulation in the knee wall and top attics.
The 2 5 8 thick sash fully filled with thermo insulating material provides an excellent barrier reducing heat loss r value 9 5.
The doors as standard are equipped with handle and finishing lining.