Which lasts better, uPVC or aluminium? 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 are durable. uPVC's edge is that it simply can't corrode; aluminium's is raw strength. In humid or coastal conditions, uPVC's immunity to corrosion counts for more than aluminium's strength.
Both are durable — uPVC can't rot, rust, or corrode; aluminium is stronger but can corrode in coastal air without good coating. In humid conditions uPVC's corrosion immunity counts for more.
Quality UV-stable uPVC resists it; low-grade profile without UV stabiliser is what chalks and fades.
Both last well — the specific product's quality matters more than the material category.
Related guides covering this topic from other angles — different products, applications, or contexts.
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