Seal drafts around windows and doors

Sealing air leaks around windows and doors with weatherstripping, caulk, and draft stoppers is one of the most cost-effective winterization steps, often cutting heating bills noticeably for under $50 in materials.

Steps

1. Find the leaks: On a cold or windy day, hold a lit incense stick near window frames, door frames, electrical outlets, and where pipes or wires enter the house. Flickering smoke reveals air movement.
2. Apply weatherstripping: Press self-adhesive foam or rubber weatherstripping tape around door frames and window sashes where moving parts meet, creating a tight seal when closed.
3. Caulk stationary gaps: Run a bead of exterior-grade caulk along cracks where stationary window and door frames meet the siding.
4. Install door sweeps: Attach a door sweep to the bottom of exterior doors to block under-door airflow, or place a draft stopper along the inside edge.
5. Add outlet gaskets: Install foam gaskets behind outlet covers and switch plates on exterior walls to stop drafts through electrical boxes.

Tips

• Replace weatherstripping annually as foam compresses and loses its seal over time
• Silicone-based caulk lasts longer outdoors than acrylic latex varieties