Energy Efficiency
How to Seal Air Leaks Around Windows and Doors
Sealing air leaks around windows and doors can improve comfort in a small home by reducing drafts, uneven temperatures, and wasted heating or cooling.
Find the Drafts First
Check gaps around door frames, window trim, sash locks, thresholds, and old weatherstripping. Drafts are often easiest to feel on windy or cold days.
Use the Right Material
Weatherstripping works for moving parts, caulk works for fixed cracks, and door sweeps help under exterior doors. Removable caulk may be better for renters.
Avoid Blocking Needed Ventilation
Air sealing should not cover combustion air openings, exhaust vents, or required ventilation. When unsure, ask a professional.
Quick Checklist
- Inspect door sweeps.
- Replace worn weatherstripping.
- Caulk fixed trim gaps.
- Use removable options for rentals.
- Do not seal vents or safety openings.
FAQ
Can renters seal drafts?
Often yes, using removable weatherstripping, draft stoppers, or temporary window film.
Does caulk work on all gaps?
No. Caulk is best for fixed gaps, not moving window or door parts.