How long should windows last?

Our house is about 15 years old and the double glazing is starting to show its age. What's the typical lifespan for uPVC windows and how do you know when they need replacing?

Asked by caroline on 9th Apr 2026
Expert Trade Answers
"Upvc windows typically last between 20-25 years depending on if they’ve been well maintained ( regular cleaning and lubricating moving parts )"
Answered on 9th Apr 2026 - Member since Sep 2025 - report
"A well‑made uPVC window typically lasts 20–25 years, depending on quality, installation, and exposure."
Answered on 9th Apr 2026 - Member since Feb 2026 - report
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