Energy Saving Devices

A knee-wall is typically a partial height wall that is usually found in the upstairs level of finished-attic homes. These walls are notoriously leaky and often uninsulated. Knee-wall doors need to be weatherstripped. They also need a latch that pulls tightly against the weatherstripping and the frame to achieve a solid seal.

Use construction adhesive and screws to attach rigid foam insulation to the attic side of the door. Pay special attention to the clearance between the insulation and the door frame and air sealing details. Adjust insulation levels or R-values to meet those recommended for your area and climate. Also, insulate and air seal the knee walls themselves for maximum energy efficiency.

Source: Energy Efficiency and Renewable Energy, U.S. Department of Energy