For sliding 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.
Sliding doors are where aluminium's case is strongest — its strength allows slimmer frames on very wide spans. For most domestic sliders, uPVC's insulation and zero maintenance still win, and we build accordingly.
uPVC insulates naturally and needs no maintenance; aluminium's strength allows slimmer frames on very wide spans. For most domestic sliders uPVC wins; aluminium suits very large, slim-framed openings.
Aluminium's case is strongest here — it carries wide spans with slimmer sections. uPVC handles most domestic sliders well with proper reinforcement.
We build in uPVC. We'll tell you honestly if aluminium suits your opening better.
Related guides covering this topic from other angles — different products, applications, or contexts.
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