The choice for design and daylight. Thanks to slim, very rigid profiles, aluminium opens up large bays with maximum glass area. With a thermal break it delivers outstanding performance — the benchmark for contemporary extensions and architectural projects.
The numbers that matter for quality aluminium joinery, fitted by our teams. Concrete benchmarks, not marketing.
Aluminium conducts heat: performance comes from the thermal break (an insulating strip between inside and outside). Paired with triple glazing, the whole unit (Uw) drops to the level of a high-performance build.
Aluminium’s rigidity allows narrow frames and large opening sashes. The result: more glass area, more daylight and clean lines no other material can match.
Sliders several metres wide, full-height windows, glazed roofs: aluminium carries surfaces PVC simply cannot. The material of architectural projects and glazed extensions.
Aluminium does not rust, warp or fear UV. Powder coating protects the colour for the long haul. It is one of the most durable materials in exterior joinery.
The full RAL range, in matte, satin or textured finishes, and even two-tone (one colour inside, another outside). The contemporary look par excellence.
No painting or treatment. A wipe with soapy water is enough. Powder coating keeps its appearance for decades with no intervention.
* Indicative values for standard-range profiles with a thermal break. Exact performance depends on the model, glazing and dimensions — confirmed at the survey.
No material is perfect for every project. Here, honestly, is where aluminium excels and where you should look elsewhere.
It comes into its own whenever you want daylight, large openings and a contemporary style. A few cases where it shines:
Sliders several metres wide, glazed façades, conservatories: aluminium opens up wide without bulking the frames. Daylight on a grand scale.
For minimalist lines and slim frames to match contemporary architecture, aluminium is the benchmark material.
Offices, shops, apartment blocks: when openings are large and numerous, the rigidity and durability of aluminium make the difference.
For the best insulation-to-price ratio on standard-size openings, the PVC window remains unbeatable. And for the warmth of wood inside with aluminium outside, take a look at wood-aluminium.
When extending a living room, the client wanted to erase the boundary between inside and the garden. We fitted a 4-metre aluminium slider with a thermal break and triple glazing: slim frames, maximum daylight and insulation on a par with a new build.
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Aluminium wins on slimness, large dimensions and style. Compare it point by point with PVC and wood-aluminium, then open up the range that interests you.
| Critère | AluminiumVous êtes ici | PVC windowsVoir la gamme → | Wood-aluminiumVoir la gamme → |
|---|---|---|---|
| Indicative price | €€€ — higher | The gentlest | €€€€ — premium |
| Profile slimness | The slimmest | Standard | Intermediate |
| Large bays | Ideal | Limited | Very good |
| Thermal insulation | Very good (thermal break) | Excellent, natural | Excellent |
| Maintenance | Virtually none | Virtually none | Virtually none (aluminium outside) |
| Aesthetics / look | Contemporary, clean | Understated, 40+ colours | Warmth of wood |
| Ideal for | Large bays, design style | Renovation, set budget | Durable premium |
The best insulation-to-price ratio on standard openings. Often 30 to 40% cheaper for equal performance.
Compare with PVC →The warmth of wood inside, the strength of aluminium outside. Durable premium, with no exterior maintenance.
Discover wood-aluminium →Aluminium excels on large sliders: low threshold, large sashes and maximum glass area.
See the sliders →Glazing accounts for ~70% of performance, whatever the frame. Understand the Ug values to equip your aluminium windows well.
Choose your glazing →Fitted price ranges by dimensions, glazing and finish. Plus the share covered by grants.
See aluminium prices →An overview of our windows & joinery in Belgium: materials, glazing, fitting and grants on one page.
Back to the windows guide →The price depends on dimensions, the type of opening, the glazing and the finish. Aluminium pays off most on large surfaces. Here are some benchmarks for fitted aluminium.
See the detailed aluminium price list →* Indicative ranges per fitted aluminium window, excluding special configurations. A costed estimate is provided with your free quote.
Provided it has a quality thermal break. Aluminium naturally conducts heat; it is the insulating strip built into the profile that delivers performance. A serious aluminium range achieves excellent results, slightly behind PVC at equal budget, but with much slimmer profiles.
The material, the thermal break and the powder-coated finish cost more than PVC. The gap is justified on large bays and design projects, where aluminium’s slimness and longevity have no equal.
Very large dimensions: sliders several metres wide, full-height windows, glazed façades. The metal’s rigidity allows opening sashes PVC cannot carry without thickening or heavy reinforcement.
The full RAL range, in matte, satin or textured finishes, and even two-tone (one colour inside, another outside). Anthracite and black are the most requested for their contemporary look.
Virtually none. The powder coating protects the colour for the long term; a simple wipe with soapy water once or twice a year is enough. No painting or treatment to redo, unlike wood.
Grants depend on the performance achieved (Uw coefficient), not on the material. A high-performance aluminium window qualifies — depending on your region and income — for a renovation grant and 6% VAT for homes over ten years old. We handle the paperwork for you.
Free on-site survey, grants calculated, a single point of contact. Describe your project in under a minute.