Knee Wall Attic Access Door Insulation

Knee wall doors provide access through the knee walls to the unconditioned parts of the attic.

Knee wall attic access door insulation.

We prefer cellulose but we use fiberglass sometimes too. How to seal knee wall doors. Blown insulation in the knee wall and top attics. These doors need to include thick insulation for example several layers of rigid foam glued to the back of the door a tight threshold good weatherstripping and a latch that pulls the door tightly shut.

The attic tent is the ultimate attic access insulation cover ever invented attic stairs scuttle holes knee wall doors and full size doors its primary design is to stop air infiltration between the home and attic the most common medium for wasting costly residential energy during both hot and cold seasons. Another alternative for knee walls conditions is to remove and reinstall the batt insulation to qii standards. Pre hung on an exterior grade 1 1 4 x 4 9 16 door frame with q lon weather stripping. Rake walls it s easier to handle than plywood or thermo ply and still gives you an r 19 r121 assembly.

Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. Access doors need to be detailed like exterior doors. Depending on your experience with construction insulation and especially attic insulation airflow a homemade cover box is unlikely to provide the same amount of benefit as an approved purpose built attic cover. Energy star qualified r 5 rated knee wall door.

Despite both of these attic doors being easy to insulate many contractors don t do it. A knee wall attic door is infamous for being leaky and all too often left without insulation. We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls. Insulate the sloped ceiling.

The knee wall access door dwk is intended to be built into l shaped walls. Then cover that same area with an r 8 fsk affixing it using cap nails. In tight attics or odd shaped wall conditions i e. Many knee wall doors have built in weather stripping and insulation.

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. An attic hatch also known as a scuttle hole is simply a panel in the ceiling that can be removed for access. As standard the door is provided with lining slats. The knee wall access doors may be installed in right or left opening versions.

Superb thermo insulating parameters r value 5 2 along with high air tightness keep heat loss to a minimum.