The window frame material you choose affects aesthetics, performance, and long-term cost across the full life of your UAE property.
The most common question we hear from UAE homeowners planning a window replacement or new-build specification is: "Should I go with aluminium or uPVC windows?" Both are widely available in the UAE. Both are offered by numerous contractors. The price difference is real. The performance difference is also real — and in the specific conditions of the UAE climate, it matters more than in most countries. This guide gives you an honest, detailed answer.
Performance in UAE Heat
Aluminium wins clearly here. Aluminium is a metal — it expands and contracts predictably with temperature changes and always returns to its original dimensions. In UAE summers where temperatures exceed 45°C ambient (and window surface temperatures can reach 60–80°C in direct sun), aluminium performs consistently.
Standard uPVC becomes soft at around 60°C and can distort permanently if sustained temperatures exceed this. This affects the seal performance of the window, the smooth operation of hardware, and over time, the visual appearance (warping, bowing). Premium uPVC profiles with heat stabilisers perform better, but even these are outperformed by aluminium in extreme UAE conditions.
UV and Coastal Durability
UAE has extreme UV radiation. Over 10–20 years:
- Aluminium — powder-coated or anodised aluminium maintains its colour and surface integrity. A quality powder coat in UAE conditions lasts 15–25 years before needing attention.
- uPVC — UV causes gradual yellowing and surface degradation in white uPVC over 10–15 years. Coloured uPVC fades faster. In coastal UAE locations, UV degradation is accelerated.
Frame Profile and Sight Lines
Aluminium allows much slimmer frame profiles than uPVC. A thermally broken aluminium window can have a frame face width of 50–70mm. An equivalent uPVC frame needs 80–100mm+ to achieve structural rigidity. This means aluminium gives you more glass area in the same opening — more light, better views, and a cleaner visual appearance. In UAE villas where large openings and maximum views are a priority, aluminium is the clear aesthetic choice.
Thermal Performance
uPVC has a slight natural thermal advantage because plastic is a poor conductor of heat. However, this advantage is only relevant in the frame itself (which is a small percentage of the total window area). Modern thermal break aluminium windows close this gap significantly — inserting a polyamide insulating barrier into the aluminium profile delivers frame performance close to uPVC while maintaining all of aluminium's structural and durability benefits.
Cost Comparison in UAE 2024
For a typical UAE villa window (1.2m x 1.4m, double glazed), rough figures only:
- uPVC double glazed: AED 400 – 700 per m²
- Aluminium double glazed (standard): AED 550 – 900 per m²
- Aluminium thermal break: AED 750 – 1,400 per m²
uPVC is cheaper upfront. However, given the shorter UAE lifespan of uPVC (15–20 years vs 30–40 years for aluminium), the total lifetime cost often favours aluminium. Replacement costs, disruption, and the lost performance of deteriorating uPVC seals must be factored in.
The Verdict for UAE
For the vast majority of UAE residential and commercial projects, thermal break aluminium windows are the superior choice. They outperform uPVC in heat, UV resistance, durability, coastal performance, and aesthetics. The premium over standard uPVC is justified by a significantly longer service life in UAE conditions.
uPVC may be appropriate for very budget-constrained projects where the property is likely to be sold or renovated within 10–15 years, and where heat exposure is lower (north-facing windows, shaded openings).
