Comparing aluminium and uPVC window frames? Here's an honest look at both.
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.
We build in uPVC, so take this with that in mind: aluminium is genuinely good where you want very slim sightlines on a big span. For most homes here, uPVC's insulation and zero maintenance win — but we'd rather be straight than pretend aluminium has no place.
uPVC insulates naturally through its chambers and needs no maintenance; aluminium is slim and strong, carrying large panes with thin sightlines but needing a thermal break to insulate. Choose by what the opening needs.
uPVC, naturally — its chambers trap air. Aluminium conducts heat readily unless it has a thermal break.
Aluminium — its strength allows thinner sightlines, which is its real advantage on large spans.
Related guides covering this topic from other angles — different products, applications, or contexts.
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