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Blog · 12 November 2026 · 4 min read

Buying windows online: step-by-step guide for Belgium

Buying windows online for delivery to Belgium: 9 steps from measuring to delivery, common mistakes and VAT. See your price instantly in the configurator.

Buying windows online from us takes three moves: you build them in the configurator and see the price straight away, you receive a quote including delivery within 3 working days, and once you approve the drawing and pay, the windows go into production. We deliver to Belgium on stillages to your site address, and you arrange installation yourself or with a fitter of your choice. Below is the whole process, plus the mistakes we most often have to correct.

Windows online to Belgium: ordering step by step

1. Measure the openings. Measure each opening in three places (top, middle, bottom) and note the smallest value. Describe the opening side of each window as seen from inside. 2. Choose a system in the configurator. It takes you through 5 steps: system, glazing, colour and extras, windows, summary. You can price the same project in several systems and compare. 3. Add windows and extras. Roller shutters, fly screens, external sills and fitting materials are added right away. The price updates after every change. Have a window schedule from your architect? Send it through the contact form and we will quote from it. 4. Receive your quote. Within 3 working days you get a firm quote including delivery to Belgium. Delivery is charged per stillage space, and the amount is in the quote before you order. You write in your language, and the quote comes in your language. 5. Approve the drawing and specification. Before production you see every window with its sizes, opening side, colour and glazing. 6. Pay 100%. From that moment the sizes are locked and we order production. 7. Wait for production. It takes 3–8 weeks, depending on the system, colour, shutters and season. Before dispatch you get photos of the finished windows. 8. Take delivery. The windows arrive on stillages. Unloading is up to you: a forklift or 2–3 people. Check the windows in front of the driver, and note and photograph any damage on the delivery note. 9. Store and install. Keep the windows upright, under a roof, away from sun and moisture. Remove the protective film no later than 4 weeks after delivery.

We explain how pricing works in the configurator in our article on pricing a window in 5 minutes. The whole process is also on our how it works page.

The most common mistakes when ordering windows online

We have worked with windows since 1997 and have completed more than 5,000 orders. With every quote we check sizes, opening sides and descriptions, because the same mistakes keep coming back:

  • Opening size instead of frame size. The window has to be smaller than the opening to leave room for insulation. If you are not sure which size to give, send photos and the raw opening sizes.
  • Opening side described from outside. A left-hand window seen from inside is right-hand from the street. Always describe it from inside.
  • Deciding on a top-mounted shutter too late. The box sits on top of the window and adds to its overall height, so the shutter changes the order size. Decide before you get a quote.
  • A sash that is too narrow. An opening sash must be at least 450 mm wide. Instead of two narrow sashes, choose one sash and a fixed pane.
  • Different colours in one order. The whole order has one colour, and on uPVC the colour goes outside only or on both sides.
  • Nobody to unload. The driver does not unload the windows. Arrange help for delivery day.
  • Counting on a 14-day return. Made-to-measure windows are exempt from the 14-day right of withdrawal (Directive 2011/83/EU, Article 16(c), across the EU). So check the drawing you approve carefully.

What should you know about delivery to Belgium?

Prices in the configurator include VAT. For delivery to Belgium we charge VAT at the Belgian rate and account for it through the OSS scheme; you see the rate and amount in the quote. This is general information, not tax advice. There are no customs duties between EU countries.

Grants for new windows in Belgium depend on the region (Flanders, Wallonia, Brussels) and have their own conditions. They often require installation by a company. Before ordering, check the rules on your region's official website or with an energy adviser.

The delivery comes with a declaration of performance and CE documentation. The GALI guarantee lasts 2 years and applies in the country of delivery. It covers profiles, hardware, sealed glazing units, shutters and motors, but not damage caused by incorrect installation. We recommend ordering at least 2 windows or 1 lift and slide door, because with a smaller order the delivery cost eats the saving. More about deliveries abroad is on our export page.

First step: a price in the configurator

Open the window configurator, add your first window and see the price. You can change the project as often as you like, and we send the quote with delivery to Belgium once your list is ready. If you first want to understand where price differences come from, read how to buy windows from Poland without middlemen.

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