Why choose Avenir Renovations?
Poorly insulated walls: an underestimated thermal weakness
Wall insulation is often neglected in favor of the roof or windows. However, it is crucial for achieving good energy performance.
An ineffective thermal barrier
Uninsulated walls allow cold air in during winter and heat in summer. This creates cold surfaces, humidity, and significant discomfort, especially in living areas or bedrooms.
Untreated thermal bridges at the junctions between walls and floors or around openings further exacerbate these losses.
An over-consuming heating system
To compensate for the losses, the heating system must operate more intensively. The result: high bills and loss of efficiency.
Insulating the walls can reduce heating needs by up to 20%, with a direct impact on CO₂ emissions and the annual bill.
A poor energy score
The energy performance certificate (PEB) takes wall insulation into account in its calculation. Not insulating the walls can cause you to lose one or more classes, which directly impacts the property's value.
Improving the PEB facilitates resale, enhances the property's value in the market, and grants access to certain more advantageous energy grants.
The different wall insulation techniques offered
Avenir Rénovations masters all wall insulation methods, with a choice adapted to each type of building, budget, and performance objective.
Why call on Avenir Rénovations to insulate your walls?
Insulating walls requires precise technical choices, depending on the structure, humidity, budget, and performance objectives.
We analyze your walls (material, thickness, presence of a void, humidity…) to determine the best insulation method and ensure optimal durability.
Our technicians also check compatibility with existing joinery and indoor ventilation to avoid issues related to poor airtightness.
We use high-performance insulators, resistant to moisture and compatible with energy grant requirements. Upon request, we offer bio-sourced insulators suitable for ecological renovations.
Our solutions also include finishes tailored to each project: mineral coatings, ventilated cladding, high-resistance plasterboard, etc.
We guide you to:
- Obtain available aids (Renolution, housing grants…)
- Compile a complete file with a certified PEB auditor
- Anticipate potential municipal authorizations in ITE
- Follow the requirements of the regional administration (minimum area, thermal performance, proof of compliance)
We help you benefit from maximum subsidies while respecting the deadlines and obligations of your region.
How much does wall insulation cost in Belgium?
| Type of wall insulation | Average price including tax / m² |
| Internal insulation | 60 to 90 € |
| External insulation (ITE) | 100 to 150 € |
| Injection insulation | 25 to 50 € |
These prices vary according to the type of wall, surface area, materials, and finishes. The price generally includes supply, installation, and accessories (profiles, vapor barriers, etc.).
FAQ – wall insulation and energy renovation
What is the best method to insulate my walls?
It depends on the building structure, your goals, and your budget:
- External insulation (ITE) is the most effective but also the most expensive.
- Internal insulation is more affordable, ideal for interior renovation.
- Injection is quick and economical, suitable for hollow walls.
We conduct an on-site technical diagnosis to offer you the most effective and durable solution.
Is a planning declaration necessary to insulate walls from the outside?
Yes, often. Any visible modification to the facade from the public road (rendering, cladding, color…) requires a declaration or permit depending on the municipality.
Avenir Rénovations assists you with these procedures and can recommend finishes that comply with local regulations (materials, colors, thicknesses…).
How much can I save on my bill after insulation?
Wall insulation can save you up to 20% on your heating bill. The exact savings depend on your heating system, the quality of the walls before work, and other insulated areas.
Savings are often noticeable from the first winter, and enhanced by the addition of intelligent heating control.
Do grants cover part of the work?
Yes. In Wallonia and Brussels, wall insulation is one of the most subsidized works. The amount varies based on your income, the insulated area, and the type of insulation used.
To benefit from the maximum, you must meet certain conditions (prior audit, accredited company, minimum performance). We help you optimize your file and gather the necessary evidence.
Does wall insulation improve acoustic comfort?
Yes. In addition to thermal gains, wall insulation improves acoustic comfort, especially in noisy streets or attached homes. It reduces external noise as well as internal nuisances like echoes or sound transmission between rooms.
Invest in well-insulated walls for lasting comfort
Wall insulation is a key step in improving the performance of your home. With Avenir Rénovations, you benefit from comprehensive support, certified materials, and impeccable installation.
Request your free quote today to effectively insulate your walls, and give your home more comfort, value... and lower energy expenses.
