How long do uPVC and aluminium windows last? Here's an honest comparison.
Aluminium window frames are strong and slim, which lets them carry large panes with thin sightlines. But aluminium conducts heat readily, so an aluminium frame transmits more heat than uPVC unless it has a thermal break.
uPVC frames are multi-chambered — the hollow chambers trap air, which slows heat transfer. That makes uPVC naturally insulating without needing a thermal break.
Both last a long time. The honest point is that lifespan depends far more on the quality of the specific product and the fitting than on the material category — a well-made, well-fitted window of either material outlasts a badly-made one.
Both last decades when they're quality products. Lifespan depends more on the specific product's quality and the fitting than on the material category.
Poor-grade material, missing reinforcement, cheap hardware, and bad fitting — for either material.
Quality UV-stable uPVC resists this. Low-grade profile without UV stabiliser is what degrades.
Related guides covering this topic from other angles — different products, applications, or contexts.
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