weatherstrips

Weatherstrips are materials used to seal gaps around doors and windows, blocking air leaks, moisture, dust, and insects. They come in a range of shapes and materials and are installed along the frame or sash to improve energy efficiency and indoor comfort.

Common forms include door weatherstripping (adhesive-backed foam, vinyl, rubber or EPDM seals; metal or plastic channels with a bulb or fin); window weatherstripping (pile or brush seals; kerf-in blades; V-strip; tubular seals; metal and vinyl components). Materials vary from open-cell foam to dense closed-cell foam, EPDM rubber, silicone, vinyl, and felt. Self-adhesive varieties are common for DIY installs, while some require mechanical fasteners or kerf installation.

Installation involves selecting the right type for the gap, cleaning the surface, measuring accurately, cutting to size, and attaching with adhesive, nails, or screws. For doors, bottom door sweeps or thresholds are often used in conjunction with side and top seals. For windows, weatherstrips are installed in the frame grooves or channels.

Benefits include reduced drafts, lower heating and cooling costs, improved indoor comfort, and reduced infiltration of dust, pollen, moisture, and pests. Proper maintenance involves inspecting for wear or compression and replacing worn seals; some materials degrade with temperature, sun exposure, or aging.

See also: energy efficiency, home insulation, caulking, door hardware.