UPVC, aluminium and timber windows each have their own expected lifespan.
As a rule of thumb, modern double-glazed windows last around 20–25 years, but the exact figure varies. Material choice (UPVC, aluminium, or timber), installation standard, weather protection, product craftsmanship and ongoing care all play a role in how long a window will perform effectively.
Here’s a closer look.
Factors That Influence Window Lifespan
Weather climate: When not adequately maintained, prolonged exposure to rain, frost, temperature swings and moisture can speed up degradation—particularly in timber windows and poorer-quality UPVC.
UV exposure: Continuous sunlight on south-facing elevations can cause subpar UPVC and timber units to fade, warp, dry out or experience seal breakdown.
Material quality: The most durable windows tend to be those featuring specialist coatings, thicker profiles and top-tier glazing systems.
Care and maintenance: Consistent aftercare is essential to long-term performance.
Expected Lifespan by Window Material
UPVC: Today’s UPVC windows typically last 20–35 years or more. Modern formulas offer improved UV stability, reducing the likelihood of brittleness or cracking.
Aluminium: Thermally broken aluminium windows provide an impressive lifespan of 30–45 years, supported by their exceptional durability. Maintenance demands are low, requiring only periodic cleaning and occasional hardware lubrication.
Timber: High-grade timber has the potential to surpass all other materials, usually lasting around 30 years, and in well-maintained cases 50–60 years. Hardwood varieties such as oak, mahogany and teak are especially dense, robust and resistant to moisture.
Replacement Clues & Care Tips
Common signs that it may be time to replace your windows include condensation within sealed glazing units, draughts, difficult operation, damp or mould forming on frames, seal failures and rising heating bills.
To lengthen the lifespan of your windows:
– Clean frames and glazing regularly
– Lubricate moving components
– Inspect seals and gaskets
– Clear drainage channels and trickle vents
– Monitor for moisture or mould around the frames
We hope you now have a clearer understanding of how often windows should be replaced. If you’re beginning to think new windows might be the right next step, we’re always here to help at TradeMark.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
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