Windows (Double-Pane): lifespan, maintenance and replacement

Typical lifespan: 15–25 years (about 20 years).

Maintenance schedule

• Clean glass and frames — Every 3 months
• Inspect and replace weatherstripping — Annually
• Check caulking around exterior — Annually
• Lubricate tracks and hardware — Annually
• Test locks and latches — Annually

Signs it needs replacing

• Fog or condensation between panes (seal failure)
• Drafts felt near closed windows
• Difficulty opening or closing
• Visible rot on wood frames
• Rising energy bills
• Excessive outside noise penetration

Tips

Low-E glass coatings can reduce energy costs by 30–50%. Consider them when replacing windows.