Knee Wall Attic Access Door Insulation

Rake walls it s easier to handle than plywood or thermo ply and still gives you an r 19 r121 assembly.

Knee wall attic access door insulation.

1 3 8 thick foam filled door. 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. Energy star qualified r 5 rated knee wall door. Then cover that same area with an r 8 fsk affixing it using cap nails.

Superb thermo insulating parameters r value 5 2 along with high air tightness keep heat loss to a minimum. How to seal knee wall doors. In tight attics or odd shaped wall conditions i e. Despite both of these attic doors being easy to insulate many contractors don t do it.

The knee wall access doors may be installed in right or left opening versions. The knee wall access door dwk is intended to be built into l shaped walls. Blown insulation in the knee wall and top attics. An attic hatch also known as a scuttle hole is simply a panel in the ceiling that can be removed for access.

Many knee wall doors have built in weather stripping and insulation. Knee wall doors provide access through the knee walls to the unconditioned parts of the attic. We prefer cellulose but we use fiberglass sometimes too. You can buy knee wall doors that have built in insulation and weather stripping.

We reduced the air leakage nearly 50 on this house in shaker heights without insulating the walls. 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. Added bonus the floor of this knee wall leaked too so there is a line of foam just above the floor joist. 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.

A knee wall attic door is infamous for being leaky and all too often left without insulation. Access doors need to be detailed like exterior doors. As standard the door is provided with lining slats. Insulate the sloped ceiling.

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.