High-performance windows, fitted by our certified teams and built to last. Triple glazing as standard, grants deducted straight from your bill, and a single point of contact from survey to after-sales service.
PVC, aluminium or wood-alu, double or triple glazing: every material has its strengths. Open the range you are interested in to compare.
The best value for money. Excellent insulation, minimal upkeep, a wide choice of colours.
See the PVC range →
Slim lines and large glazed surfaces. Ideal for a contemporary style and XXL bays.
Explore aluminium →
The warmth of wood inside, the resilience of aluminium outside. The durable premium choice.
Wood-alu in detail →
Glazing accounts for 70% of performance. Understand Ug values and pick the right level.
Compare glazing types →
Front doors, sliding and lift-and-slide bays. Light at full scale, without losing insulation.
Doors & glazed bays →
Summer comfort, privacy and security. Solar-powered shutters and motorised, controllable screens.
Discover sun protection →Belgian profiles, proven and guaranteed. Honest advice on the material that truly suits your home.
Insulation values among the best on the market. Fewer losses, more comfort, lower bills.
No uncontrolled subcontracting: our trained fitters ensure airtightness and clean finishes.
We build your renovation grant file and apply the 6% VAT rate whenever you qualify.
Lead times, regional grants, local references: our city pages give you the details that matter where you live.
All our service areas →The price depends on the material, the dimensions and the glazing. Here are some concrete benchmarks — and the share that grants can cover.
See the detailed price list →* Indicative ranges per window fitted, excluding configuration. Precise estimate provided with your free quote.
Replacing your windows without insulating the roof means heating half the house for nothing. Planned together, these two jobs multiply your savings — and a single quote is all it takes.
Discover insulation →
The window is the centrepiece of comfort in a Belgian home. It lets the light in, shuts out street noise and keeps the warmth inside during winter. In an older property, tired windows can on their own account for a large share of heat loss: single glazing, cracked seals and warped frames let the cold and damp in.
“Replacing your windows is first and foremost about regaining a healthy, quiet and temperate interior — the savings follow naturally afterwards.
There is no "best" material in absolute terms, only the one that suits your home and your budget. Each has its own logic:
Insulates remarkably well, low maintenance, the gentlest price.
See PVC →Very slim profiles for large bays and a contemporary style.
See aluminium →Warmth of wood inside, robustness of aluminium outside. Durable.
See wood-alu →People often talk about the frame, but it is mainly the glazing that determines insulation. High-efficiency double glazing is the minimum today, and triple glazing becomes worthwhile as soon as you aim for an ambitious renovation or a north-facing façade.
of a window’s thermal performance comes down to the glazing, not the frame. The Ug value measures it: the lower it is, the better.
A wendows advisor helps you weigh up comfort, budget and orientation — without needless jargon, as befits our one stop shop approach.
Beyond the figures, new windows transform daily life: no more cold surface you would rather not sit beside, a real gain in quiet near busy roads, and stronger security thanks to laminated glazing and multi-point hardware. Paired with shutters or screens, they also keep summer overheating in check — a subject that matters more and more, even at our latitudes.
Replacing your windows entitles you, in most cases, to a renovation grant whose amount depends on the region and your income, as well as the reduced 6% VAT rate for homes over ten years old.
We handle the entire administrative file and, where possible, deduct the grant straight from your bill. An overview of the support available by region in our grants & support section.
A well-fitted window is airtight and watertight, aligned to the millimetre, and finished cleanly inside and out. That is why our teams handle the fitting themselves rather than delegating it.
If you are renovating in stages, the smart move is often to tackle the insulation of your home right afterwards, or just before: the two jobs complement each other and avoid having to return to the façade twice. Living in a major city? Our pages on windows in Brussels, in Liège or in your municipality spell out lead times and local references.
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 »
PVC offers the best insulation-to-price ratio and suits the majority of homes. Aluminium is ideal for large glazed surfaces and a clean style. Wood-alu targets the durable premium segment. During the survey, we guide you according to your façade, your budget and the look you want.
High-efficiency double glazing is the standard today. Triple glazing is justified for an ambitious renovation, a north-facing façade or a low-consumption goal. We compare the Ug values and the extra cost to decide together on the best compromise.
Depending on your region and your income, replacing windows can entitle you to a renovation grant, sometimes up to 35% of the cost of the works, as well as the reduced 6% VAT rate for homes over ten years old. We build the file and deduct the grant where possible.
For a typical house, replacing the windows generally takes one to three days depending on the number of openings. We work cleanly, protect your interior and complete the finishing the same day.
For a like-for-like replacement (same dimensions and layout), no permit is generally required. A declaration may be needed if you change the appearance, enlarge a bay or are in a protected area. We tell you the steps to follow depending on your municipality.
You benefit from the manufacturer’s warranty on the profiles and glazing, as well as our warranty on the fitting. Our after-sales service is based in Belgium: a single point of contact, from quote to the smallest later adjustment.
Free survey, grants calculated, a single point of contact. Describe your project in under a minute.