When you want to make the wall disappear onto the garden, aluminium is the only material rigid enough for leaves several metres wide with mullions that stay slim. Simple slider, HST lift-and-slide or pocket sliding that disappears into the wall: light on a grand scale, with no compromise on insulation.
The figures that matter for a large aluminium slider fitted by our teams. Concrete benchmarks, specific to the material, not marketing.
The rigidity of aluminium allows leaves several metres wide and several hundred kilos of glazing. No PVC holds such surfaces without thickening or being heavily reinforced: this is the decisive structural advantage of the aluminium slider.
Where a PVC slider shows wide mullions, aluminium keeps narrow profiles and discreet leaf edges. The result: more clear glazing and a clear view, even on large bays.
On a large glazed surface, performance comes down to the pairing of thermal break plus triple glazing. With a quality insulating strip, a large aluminium slider reaches the level of a high-performance build.
The lift-and-slide (HST) locks the leaf against the frame as it descends: air, water and wind tightness clearly superior to a translation slider, ideal on façades exposed to wind and rain.
Anti-lift rollers, multi-point locking and optional laminated glazing: a large aluminium slider can be secured to the level of a front door, without sacrificing the slimness of the profiles.
A recessed level threshold, with no step: a level walk-through between living room and terrace, comfortable for all and compliant with accessibility requirements. Optionally motorisable for very large leaves.
* Indicative values for common-range aluminium sliding systems with a thermal break. Exact performance depends on the system (translation, HST, pocket sliding), the glazing and the dimensions — confirmed at the site survey.
No solution is perfect for every project. Here, honestly, is where the aluminium slider excels and where you should think carefully before going ahead.
It is the obvious choice whenever you want to open up wide onto the outside without bulking up the mullions. A few cases where it makes all the difference:
Make the wall between inside and the terrace disappear through a bay several metres wide: aluminium carries the surface, the mullions stay slim, the light pours in.
On a façade hit by wind and rain, the HST lift-and-slide locks the leaf against the frame: tightness and thermal comfort assured.
Pocket sliding tucks the leaf into the thickness of the wall: full opening, no more visible boundary between inside and out. The ultimate architectural gesture.
To compare all the sliding systems, across all materials, take a look at the sliding range. And if it is the whole opening project that concerns you, start from the sliding wall.
The customer wanted a full opening onto their terrace, without too wide a central mullion. We fitted a 5-metre aluminium lift-and-slide with a thermal break and triple glazing, recessed flat threshold: slim leaves, first-rate tightness and insulation at new-build level.
5.0/5 · 5verified reviews
« Nous avons fait appel à la société Wendows pour le renouvellement de nos châssis et nous sommes vraiment ravis du résultat ! Les travaux ont été réalisés dans les délais annoncés et la finition est impeccable. De plus, M. Aprile qui s'est occupé du devis, s'est toujours montré disponible pour répondre à toutes nos questions. Nous vous recommandons donc de faire appel à eux pour vos travaux ! »
« Nous avons fait appel à Wendows pour le remplacement de nos châssis et nous sommes très satisfait de notre choix. Qualité et suivi de chantier au top ! »
« Ik heb via WEndows een raam aangekocht van 2m x 2m. Mijn algemene ervaring is goed. Zeer goeie communicatie, altijs zeer snelle reactie bij een vraag of opmerking. Het installatie team werkte ook zeer efficient. Tevreden van het eindresultaat! Bedankt WEndows »
Three entry points for the same need. Here, the engineering specific to aluminium; alongside, the all-materials sliding range and the bay project as a whole. Compare before choosing.
| Critère | Aluminium sliderVous êtes ici | Sliders (range)Voir la gamme → | Sliding wallVoir la gamme → |
|---|---|---|---|
| Angle of the page | Aluminium engineering | All materials | The opening project |
| Maximum dimensions | The largest | Depending on material | Depending on the chosen system |
| Mullion slimness | The slimmest | Variable | Variable |
| Systems (HST, pocket) | All, in aluminium | Presented | Mentioned |
| Thermal insulation | Very good (thermal break) | Depending on material | Depending on glazing |
| Indicative price | €€€ — top of the range | From PVC to aluminium | Variable by project |
| Ideal for | Very large design bays | Comparing materials | Framing your project |
Everything about the material: slim profiles, thermal break, RAL colours and performance. The basis before choosing a slider.
See aluminium windows →The opening project as a whole, independent of the material: dimensions, systems and budget to open onto the outside.
See the bay project →All the sliders, all materials: translation, lift-and-slide, pocket sliding. To compare before settling on aluminium.
Compare the range →On a large surface, the glazing does most of the performance work. Understand the Ug values to properly equip your slider.
Choose your glazing →Fitted price ranges according to dimensions, system and glazing. And the share covered by grants.
See aluminium prices →An overview of our window frames & joinery in Belgium: materials, glazing, fitting and grants on one page.
Back to the window guide →The price depends on the dimensions, the system (translation, HST, pocket sliding), the glazing and the finish. It is on large surfaces that aluminium pays off best. Here are some benchmarks for a fitted aluminium slider.
See the detailed aluminium price list →* Indicative ranges per fitted aluminium slider, excluding specific configurations. A costed estimate is provided with your free quote.
Because it is the only material rigid enough to carry leaves several metres wide and several hundred kilos while keeping slim mullions. PVC, on such surfaces, has to thicken or be heavily reinforced — you then lose the clear glazing and the slimness that make a large bay so appealing.
The translation slider glides the leaf sideways. The lift-and-slide (HST) first lifts the leaf then glides it, and locks it as it lowers back against the frame: you gain air, water and wind tightness that is clearly superior, ideal on very large bays and exposed façades.
Pocket sliding tucks the leaf or leaves into the thickness of the wall: once open, no visible trace of the bay remains, the opening is total. It is the most radical architectural gesture, to anticipate from the structural stage as it requires a recess in the masonry.
Yes, provided a quality thermal break is paired with good glazing. On a large surface, it is mainly the glazing that counts: with triple glazing, an aluminium slider reaches a Uw at the level of a high-performance build, around 0.9 W/m²K.
Yes: we fit a recessed flat threshold, with no step, for a perfect continuity between the living room and the terrace. It is comfortable day to day, safe for children and the elderly, and compliant with accessibility requirements.
Grants depend on the performance achieved (the Uw coefficient), not on the material or the system. A high-performance aluminium slider qualifies, depending on your region and income, for a renovation grant and the 6% VAT rate for homes over ten years old. We handle the paperwork for you.
Free home survey, advice on the system (translation, HST, pocket sliding), grants calculated, a single point of contact.