For doors, how do uPVC and aluminium compare? Here's an honest look.
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.
For domestic doors, uPVC's insulation, sealing, and zero maintenance suit most homes. Aluminium's advantage — slim strong sections — matters most on very large glazed doors.
uPVC insulates naturally, resists corrosion, and needs no painting; aluminium offers slim strong sections that suit very large glazed doors. For most domestic doors uPVC wins.
Both can be secure — security comes from multi-point locking, laminated glass, and good fitting rather than the frame material alone.
uPVC doesn't corrode at all; aluminium can corrode in coastal air without good coating.
Related guides covering this topic from other angles — different products, applications, or contexts.
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