Windows are one of the first sources of heat loss in a home. Switching to high-performance glazing and frames means a tighter envelope, comfort regained and an EPC rating that climbs back up. We size your windows as a real renovation lever, grants included.
A window is not just a frame: it is part of the thermal envelope. The right glazing, the right frame and a careful fitting transform the comfort and performance of the home.
High-efficiency double glazing drops to Ug ≤ 1.1 W/m²K, triple glazing lower still. It is the Uw coefficient of the whole window — glass, spacer and frame — that really drives your heat loss.
Asymmetric glazing and new seals cut out the noise of the street, the neighbours or traffic. Acoustic comfort is often the first thing felt after the replacement.
Old windows create cold walls, condensation and mould on the edges. A high-performance, well-fitted window removes those cold spots and the damp that comes with them.
Replacing single glazing with double or triple glazing improves the energy balance and can push the EPC rating up — a direct asset for comfort as well as for the property’s value.
The Walloon renovation grant starts from €40/m² of glazing (amount adjusted to income), and the 6% VAT applies to labour and supplies for a home over ten years old.
Very high-performance windows on uninsulated walls simply shift the cold spot. We think in terms of the whole envelope, in the logical order, so every euro invested counts.
We look at the state of the existing windows, the type of glazing and the consistency with the rest of the envelope — ideally in connection with an energy audit of the home.
Double or triple glazing, PVC, wood or aluminium: we select the glazing/frame pairing that reaches the right Uw according to your budget and the orientation of the windows.
You receive a clear quote, VAT 6% included, with an estimate of the renovation grants so you can see the cost actually left to you.
A careful fitting — air tightness, seals, caulking — determines the real gain. Fine glazing badly fitted loses most of its performance.
Replacing single glazing can sharply reduce heat loss through the windows. High-efficiency double glazing is now the standard; triple glazing is justified on the most exposed façades and very high-performance projects.
We price your windows within the logic of your overall project — glazing, frame, fitting and grants included.
Windows are among the first sources of heat loss in a home. Replacing single glazing with high-efficiency double or triple glazing clearly reduces losses through the windows and improves comfort. The exact gain depends on the glazed area, the orientation and the general state of the envelope: an energy audit lets you put a precise figure on it.
High-efficiency double glazing (Ug ≤ 1.1 W/m²K) offers the best gain-to-price ratio and remains the renovation standard. Triple glazing brings the Ug down further and is justified on very exposed façades, large glazed surfaces or low-energy projects. We guide you according to the orientation of the windows and your budget.
Replacing old windows or single glazing with high-performance glazing improves the home’s energy balance and can push the EPC rating up. The effect is all the more marked when the windows replaced were old and the move is part of an overall renovation of the envelope.
In Wallonia, the renovation grant for replacing windows starts from €40/m² of glazing, with an amount adjusted to the household’s income. On top of that comes the reduced 6% VAT for a home over ten years old. We estimate the grants you can claim on your quote and point you to the required audit where applicable.
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« 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 »
Tell us about your windows and their current state: we propose suitable glazing, a quote net of grants and a high-performance fitting.