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In the face of soaring energy prices and increasing environmental demands, energy renovation has become an essential priority for many Belgian households. Whether to improve the thermal comfort of your home, reduce your bills, or increase the value of your property, energy performance work is a profitable long-term investment.
In this article, discover how to optimize the insulation of your home in Belgium, what the most effective solutions are, the available aids in 2025, and why to call on Avenir Rénovations, a recognized expert in all trades now established in Belgium.
Heating alone accounts for more than 60% of a home's energy consumption. A poorly insulated house can lead to massive heat losses through the roof, walls, windows, or floors. The result: high bills and constant discomfort in winter and summer.
Investing in energy renovation allows you to:
Belgium is gradually strengthening regulations regarding the energy performance of buildings (PEB). In Brussels, Wallonia, and Flanders, standards are tightening, and future renovation obligations are being studied for the most energy-consuming homes (labels G and F).
Before any energy renovation, it is essential to understand where the heat leaks are located.
| Building element | Percentage of heat loss |
| Roof | 25 to 30 % |
| Exterior walls | 20 to 25 % |
| Windows and glazing | 10 to 15 % |
| Floors | 7 to 10 % |
| Air leaks and thermal bridges | 10 to 20 % |
This data shows how the overall insulation of the building envelope is crucial for improving energy performance.
First insulate the roof, then the walls, windows, and floors. Add a mechanical ventilation system. These solutions reduce heat loss, improve comfort, and qualify for assistance.
Each Region has its own system of energy renovation aids.
Throughout Belgium, a 6% VAT applies to energy improvement work carried out in homes over 10 years old (or 5 years in Flanders), provided they are performed by an accredited company.
At Avenir Rénovations, we do not carry out simple work. We design turnkey renovation projects focused on energy performance, comfort, and sustainability. Our teams intervene on:
With over 170 agencies in France and now present in Belgium, Avenir Rénovations is a reference player in the field of insulation and energy performance. We apply the strictest standards and work exclusively with qualified craftsmen trained in the use of high-performance materials.
We provide you with a dedicated project manager who supports you from A to Z:
Each Avenir Rénovations intervention is contractually framed with ten-year guarantees, professional insurance, detailed quotes, and a clear schedule.
" We entrusted Avenir Rénovations with the complete insulation of our roof and the replacement of the frames. Thanks to their support, we obtained the RENOLUTION grant and reduced our heating bills by 45%. We recommend them without hesitation! "
– Anne and Philippe, Schaerbeek
We use highly efficient materials: wood wool, cellulose wadding, PIR, wood fiber, triple glazing, vapor barrier membranes...
| Objective | Proposed solution | Avenir Rénovations support |
| Reduce your bills | Roof, wall, glazing insulation | Yes |
| Enhance your property | Global energy renovation | Yes |
| Obtain assistance | Housing grant, RENOLUTION, Mijn VerbouwPremie | Assistance with file preparation |
| Comply with PEB standards | Energy audit, compliant works | Administrative and technical follow-up |
| Be supported from A to Z | Dedicated project manager | Coordination of all trades |
Renovating your home means improving your quality of life. At Avenir Rénovations, we do everything possible to ensure your project is a success: personalized advice, technical expertise, administrative management, and above all, a sustainable result.
Request your free diagnosis now to assess the weaknesses of your home and discover all the available assistance for your energy works in 2025.
