For sliding and French doors, the uPVC-versus-aluminium decision follows similar lines to windows, but the larger glazed area and heavier use shift the balance slightly. Here's how to think about it.
Big door panels are heavy, and aluminium's strength lets it carry large glazed panels on slim frames. uPVC handles standard door sizes well with appropriately engineered profiles and hardware, but for exceptionally wide spans aluminium has an advantage.
A door is a large opening, so frame conduction matters. uPVC resists heat transfer better than untreated aluminium, helping the adjacent room stay comfortable.
uPVC needs no painting and won't corrode. Both glide well when fitted with quality rollers; the smoothness you feel day to day depends more on hardware quality and correct installation than on the frame material.
Either works; uPVC gives better insulation and zero maintenance, aluminium gives slimmer frames on very large panels. For most balconies uPVC is an excellent fit.
Not when the profile and rollers are correctly specified for the panel weight and the door is installed properly. Sagging usually traces to under-specified hardware, not the material.
uPVC — no painting, no corrosion, just the occasional clean of the track and glass.
Related guides covering this topic from other angles — different products, applications, or contexts.
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