Where aluminium works well
Aluminium is strong, slim, durable, and suitable for large windows, sliding doors, curtain-wall work, and projects where a sharper architectural finish is important. Powder-coated and anodized finishes give designers more visual control.
Where uPVC works well
uPVC windows are popular for homes because they offer good thermal insulation, low maintenance, tight sealing, and value. The profile should have proper reinforcement, good gaskets, reliable hardware, and correct drainage design.
Compare the complete system
- Strength: aluminium generally handles larger spans better.
- Insulation: uPVC often performs well thermally; thermally broken aluminium can also perform strongly.
- Appearance: aluminium can look slimmer and more contemporary.
- Maintenance: both are low maintenance when finished and installed correctly.
- Cost: uPVC is often economical for standard residential sizes, while aluminium varies by system and finish.
Decision checklist
Before choosing, confirm opening size, wind exposure, glass weight, color requirement, hardware quality, warranty, drainage, service support, and installer experience. A good installation can matter as much as the frame material itself.