Maintenance
How Often Should You Replace Your Windows?
By David Golovin · September 30, 2026 · 2 min read
Most windows last 15 to 40 years depending on material. When condensation appears between panes, the seal is gone and replacement is the only fix.
| Material | Lifespan | Notes |
|---|---|---|
| Vinyl | 20 - 40 years | Low maintenance, most common |
| Wood | 15 - 30 years | Needs regular painting or sealing |
| Aluminum | 15 - 25 years | Prone to condensation in cold climates |
| Fiberglass | 40+ years | Longest lasting, higher upfront cost |
Signs your windows are done
Fog between panes, drafts along the frame, difficulty operating the sash, and a spike in energy bills all point to windows past their useful life.
Source: U.S. Department of Energy, Energy Efficient Windows
Why it matters at closing
Buyers and agents ask about window age during inspection. Failed seals often trigger repair requests or price credits, especially on assumable-loan homes where closing timelines are longer.
FAQ
How do you know when windows need replacing?
The clearest signs: condensation or fog between the panes (the seal has failed), drafts around the frame on a calm day, difficulty opening or closing, visible rot in wood frames, or a notable spike in heating or cooling costs.
What type of windows last the longest?
Fiberglass windows last the longest, typically 40 years or more. Vinyl is the most popular choice because it lasts 20 to 40 years with minimal upkeep. Wood requires the most maintenance and has the shortest lifespan of standard options.
Does window replacement add home value?
Yes. New windows are a recognized selling point. The Remodeling Magazine Cost vs. Value Report shows window replacement recoups a meaningful portion of its cost at resale, and buyers often ask about window age during inspections.