Why choose Avenir Renovations?
Why insulation is a crucial step in your renovation
Insulation is not just about installing a material. It directly affects the quality of life inside the home, the performance of the heating system, the acoustic ambiance, and the overall value of the property.
Too many losses through untreated areas
Heat naturally escapes upwards (through the roof), sideways (through the walls), and downwards (through the floors). Without treatment, these areas act as permanent thermal bridges. You are therefore unnecessarily heating outdoor spaces, leading to energy overconsumption and persistent discomfort.
Unequal comfort depending on the rooms
Cold walls, icy floors, or a stifling room in the attic are signs of thermal imbalance. In winter, some rooms remain too cold despite heating. In summer, others overheat. Properly sized insulation helps unify the temperature throughout the home, both day and night.
An energy value to preserve
The energy performance certificate (PEB) has become an essential criterion in Belgium, especially for the sale or rental of a property. A poor rating can hinder a real estate project or even decrease the property's value. Conversely, effective insulation improves your PEB score, attracts buyers, and enhances the sustainability of your assets.
Our insulation solutions according to the areas of your home
We adapt our techniques to the configuration of your home, your budget, accessibility constraints, and your comfort priorities.
Why call on Avenir Rénovations for your insulation work?
Hiring experienced professionals guarantees you a durable result, compliant with standards, and especially optimized to benefit from the financial aid available in Belgium.
Before any intervention, we conduct a complete evaluation of the building: analysis of heat losses, inspection of the existing structure, feasibility study. This allows us to prioritize the most profitable areas and avoid duplicates or technical errors.
We select insulation materials:
- With high thermal performance (low lambda values)
- Moisture resistant (essential for roofs and floors)
- With good acoustic properties for enhanced sound comfort
- Compliant with PEB standards, CSTC, and eligible for regional grants
Upon request, we also offer bio-sourced or recyclable materials for projects with high environmental value.
We help you to:
- Identify available grants in Brussels or Wallonia
- Prepare a complete file with PEB audit if necessary
- Gather the required technical and administrative documents
- Plan the work according to eligibility conditions
What is the price of insulation work in Belgium?
| Type of insulation | Average price including tax / m² |
| Interior roof insulation | 40 to 70 € |
| Exterior roof insulation (sarking) | 80 to 130 € |
| Interior wall insulation | 60 to 90 € |
| Exterior wall insulation (ITE) | 100 to 150 € |
| Floor insulation | 50 to 100 € |
Prices vary depending on the insulation used, thickness, total area, accessibility, and chosen finish. A personalized quote is provided after a technical visit.
FAQ – thermal insulation and energy grants
Where should I start if I need to insulate in stages?
The recommended order is as follows:
- Roof (highest heat loss)
- Walls
- Frames and glazing
- Floors
We help you define an intervention plan suited to your home, your budget, and the available grants.
Can I benefit from grants for my insulation work?
Yes, in Wallonia as well as in Brussels. The grants cover part of the costs, provided that:
- The insulation meets a minimum performance (R or U value)
- The work is carried out by a certified contractor
- An energy audit is conducted if required
The amounts vary depending on your income and the area insulated.
How much can I save after insulating my house?
Savings vary depending on the area, the age of the previous insulation, and your heating system. On average:
- Roof: 25 to 30% savings
- Walls: 20 to 25%
- Floors: 5 to 10%
From the first winter, the difference is noticeable on the bill and in comfort.
Does insulation also improve acoustics?
Yes. Certain materials like rock wool or cellulose wadding provide excellent sound insulation. They reduce external noise (street, traffic) as well as internal disturbances (voices, television, impacts).
A well-insulated house is a more comfortable house
Insulation is not an expense, it is an investment in the comfort, performance, and value of your home. Trust your work to Avenir Rénovations to benefit from professional support, quality materials, and a lasting result. Contact us for a free visit and a personalized quote.
