Repair the weatherstripping when a drafty door or window still closes squarely. Replace it when it will not seal after new weatherstripping, or when frames rot, glass fogs, or safety is at risk. Serving 730+ towns across Massachusetts, New Hampshire and Maine, Coastal Windows & Exteriors is a woman-owned exterior remodeling company with 7,000+ installations completed since 2011. That experience backs honest entry door replacement and window guidance, including telling you when a simple repair is the better call.
Repair or Replace: How to Decide
- Seal still fails: If a door won’t seal tightly after new weatherstripping, it may be bent and need replacing. Get a free estimate to compare repair and entry door replacement.
- Dollar bill test: Close a door or window on a dollar bill. If it slips out easily, repair or replace the weatherstripping.
- Cheap fix first: If doors and windows still work, you can try adding weatherstripping first.
- Clear upgrade signs: Condensation between panes, rotting frames, or safety issues justify replacement windows, per Vermont Energy Saver.
- Low repair cost: DOE says weatherstripping double-hung windows takes about an hour and costs $5 to $10.
Smart Next Steps
Run the dollar test: Close the door or window on a bill, and a loose slip means the seal needs work. If this happens, call Coastal Windows & Exteriors for a free assessment.
Start cheap: Fresh weatherstripping is the first, low-cost step when the unit still closes square.
Top recommendation: For seals that keep failing, ask Coastal Windows & Exteriors for a free estimate on replacement.
Smart benefit: Testing seals this fall leaves time to replace anything that fails before winter.
Not sure whether to patch the seal or replace the unit? Reach out for a free, no obligation door and window estimate, with timelines confirmed at your visit. Coastal Windows & Exteriors is a woman-owned company with local branches. We serve homeowners across the region. Ask about 50% off installation and financing up to 20 years, arranged through Coastal.
Request a free door estimate from Coastal Windows & Exteriors.
Browse our complete door FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors Door Exterior Remodeling Home Improvement Help Center.
Still have questions about when a homeowner should repair weatherstripping versus replace a drafty door or window? See the areas we serve and talk to your local door and window contractor.
Last Updated: October 2026
Sources:
- Condensation between panes, rotting frames, and safety issues are solid reasons to replace windows and doors. Vermont Energy Saver Windows and Doors, guidance on when replacement makes sense. (Accessed October 2026)
- Weatherstripping double-hung or sash windows saves 5% to 10% for about $5 to $10 and an hour’s work. U.S. Department of Energy Weatherstrip Double-Hung or Sash Windows, DOE’s DIY weatherstripping project. (Accessed October 2026)
