weatherstrip

Weatherstrip, or weatherstripping, is a material applied to the edges of doors and windows to seal gaps and reduce air infiltration. It helps block drafts, moisture, dust, and insects, while contributing to energy efficiency and indoor comfort.

Materials commonly used for weatherstripping include foam (polyethylene or polyurethane), vinyl, rubber (EPDM), silicone, and felt. Profiles range from adhesive-backed foam tape and tubular seals to V-strip and door sweeps or thresholds. Some weatherstrips are metal or composite and are used in more durable or retrofit applications. The choice depends on the type of door or window, climate, and desired seal strength.

Installation involves cleaning the mounting surface, selecting an appropriate profile, trimming the weatherstrip to fit, and attaching it with adhesive, nails, or screws. For doors, the goal is a light compression when the door is closed; for windows, the strip should not impede operation or create misalignment. Proper installation should ensure a continuous seal around the frame without creating binding or leaks at corners.

Benefits of weatherstripping include reduced energy bills, improved thermal comfort, and better moisture control and pest prevention. Limitations can include compressed or degraded seals over time, which reduce effectiveness, and potential interference with door or window operation if misapplied. Some weatherstrips may require professional installation in older frames.

Maintenance involves periodic inspection for wear, cracking, or loose adhesive, and replacement when seals no longer provide a proper seal. Regular cleaning helps maintain adhesion and performance.