Interior View of a Room with a Skylight - Benefits of Natural Lighting

Roof Window Installation in Belgium: Complete Guide

Are you considering installing a roof window in your home? Whether you live in Flanders, Brussels, or Wallonia, this comprehensive guide will help you understand the steps, local regulations, and costs associated with this type of project.

Why Install a Roof Window?

Roof windows, also known as skylights (although Velux is a brand), are an ideal solution for bringing more natural light and ventilation into attics or sloping rooms. Here are their main advantages:

 
  • Natural lighting : Improve the lighting ambiance of your rooms.
  • Thermal and acoustic insulation : Modern models offer excellent insulation.
  • Added value : Increase the value of your property thanks to better used space.
  • Comfort : Transform your attic into habitable rooms (bedroom, office, games room).
 

Building Regulations and Permits in Belgium

Before you begin installing a roof window, it is essential to check local regulations. These rules vary depending on the region:

 1. Flemish Region

  • For small installations (less than 5m²), no permit is generally required.
  • If the window changes the exterior appearance of the house, planning permission may be required.

 2. Brussels-Capital Region

  • Any modification visible from the outside requires a planning permission application .
  • Consult the Regional Land Use Plan (PRAS) to check the restrictions specific to your area.

 3. Walloon Region

  • The work must comply with the Walloon Territorial Development Code (CWDT) .
  • A permit is often required if the window exceeds a certain size or changes the architectural appearance.
 

Advice : Contact your local administration for specific information on the steps to follow.

Roof Window Installation in Belgium - Key Steps and Practical Tips
Professional Roof Window Installation in Wallonia - Durable and Insulating Materials

Key Steps to Installing a Roof Window

1. Needs assessment

  • Determine the ideal location to maximize light entry.
  • Check the planned technique (roof structure, slope, etc.)

 2. Choice of Material and Model

Roof windows are available in different materials and configurations:

  • Materials : Wood (natural aesthetic), PVC (economical and resistant), aluminum (modern and durable).
  • Opening types : Rotating, tilting, fixed or electric.

 3. Site Preparation

  • Make sure the roof is in good condition before installation.
  • Plan the work during a period of good weather if possible.

 4. Professional Installation

Installation must be carried out by a qualified professional to ensure watertightness and safety. Steps include:

  • Precise cutting of the opening in the roof.
  • Install the window with suitable fixings.
  • Perfect sealing to prevent water infiltration.

Average Cost of a Roof Window Installation

The price of a roof window depends on several factors: the model chosen, the dimensions, the material, and the labor costs. Here is an indicative price list for Belgium:

 
Window Type
Price (material only)
Total price (with installation)
Single window (PVC)
300–600 €
700–1,200 €
Double glazed window
500–900 €
1,000–1,800 €
Electric window
800–1,500 €
1,500–2,500 €
Custom window
1,000–3,000 €
2,000–4,000 €

Note : Prices may vary depending on region and available grants.

Frequently Asked Questions About Roof Windows

1. How long does it take to install a roof window?

Typically, installation takes between 1 and 3 days , depending on the complexity of the project.

 

2. Is it possible to install a roof window yourself?

Although technically possible, it is strongly recommended to hire a professional to ensure watertightness and safety.

 

3. What is the lifespan of a roof window?

With regular maintenance, a roof window can last 20 to 30 years , or even longer.

 

4. How to maintain a roof window?

Clean the windows regularly and check the seals for leaks. Also inspect the opening mechanism annually.

 

Conclusion

Installing a roof window is a great way to improve the brightness and comfort of your home while increasing its value. By following local regulations and using quality materials, you can fully enjoy the benefits of this solution. Don't forget to check out the financial assistance available in your area to reduce costs.

 

If you have any further questions or need additional information, please do not hesitate to contact qualified professionals in your area.

For any further information, please contact the regional administration on which you depend:
 

Related articles...

Log in

Register

Reset password

Please enter your username or email address. A link to create a new password will be emailed to you.