Insulation work in Luxembourg

Our insulation services

• Insulation of lost or convertible attics
• Insulation of walls from the inside or outside
• Insulation of the ground floor and floors
• Replacement of old windows and joinery
• Complete thermal diagnosis before work

Progress of an insulation project

The thermal diagnosis identifies losses before providing you with a detailed estimate. This step allows prioritizing the work that will have the most impact on your energy bill.

The work follows a logical order: roofing and attics first, then walls, and then joinery if the budget allows for a single phase. Each item can also be addressed separately, spread over several years.

A final check verifies the continuity of the insulation, a point often overlooked that can create thermal bridges significantly reducing the overall performance achieved.

The benefits of effective insulation

A profitable long-term investment

The cost of the work is offset in a few years thanks to the energy savings achieved, a calculation that is even more favorable as energy prices continue to rise in the region over the long term.

Better acoustic comfort

High-performance thermal insulators also reduce outside noise, a valuable advantage in neighborhoods closer to traffic routes or the Findel airport.

Better indoor air quality

Combined with appropriate ventilation, good insulation limits humidity and condensation problems, two factors that degrade the quality of the air breathed daily in a poorly insulated home.

Intervention areas in Luxembourg City

• Beggen and Dommeldange: houses from the 1960s-1980s to insulate
• Merl and Belair: villas with significant energy improvement potential
• Bonnevoie: terraced houses, interior insulation preferred
• Kirchberg and Gasperich: recent constructions, targeted adjustments

Klimabonus, VAT, and aid in Luxembourg

The Klimabonus 2026 scheme financially supports insulation work with fixed amounts per square meter or per replaced item, cumulative with energy supplier bonuses and certain municipal aids. The specific conditions vary according to the exact nature of the work, to be verified during the diagnosis.

For a home over ten years old, the super-reduced VAT of 3% generally applies to insulation work, in addition to Klimabonus aids. The combination of these measures significantly reduces the actual cost to the owner.

Why choose Avenir Rénovations for your insulation

Insulation is a field where the quality of installation matters as much as the material chosen: a high-end insulator poorly installed, with thermal bridges or discontinuities, offers performance far below that stated on the product's technical sheet.

Complete support from A to Z

Diagnosis, material selection, installation, and management of administrative procedures related to aids: we handle the entire project with a single point of contact, from the first meeting to the finalized Klimabonus file.

Certified and trained craftsmen

Our teams are trained in current installation techniques, a criterion sometimes required to benefit from certain Luxembourg public aids, and systematically checked before the start of the work.

Total transparency on costs

Each estimate clearly distinguishes the cost of the work and the estimated amount of mobilizable aids, for a clear net budget from the start, without unpleasant surprises at the time of final billing.

Permits, lifespan, and acoustic comfort

External insulation that alters the appearance of the facade may require a municipal declaration, especially in neighborhoods with marked architectural character. When properly installed, insulation retains its performance for several decades, with ventilation checks recommended every ten years or so. Most thermal insulators also provide good acoustic performance, a secondary benefit appreciated in the more urban neighborhoods of the capital.

Insulate without full renovation, combined aids, and signs of wear

Insulation can be addressed independently of a broader renovation in an older home, prioritizing the most energy-wasting areas identified during the thermal diagnosis. Klimabonus and super-reduced VAT can be combined without particular difficulty: the Klimabonus reduces the amount of eligible work, while the 3% VAT applies to the remaining amount, provided the home meets the required age and use conditions. Cold walls to the touch, recurring condensation on windows, rising heating bills without a change in usage: these signals justify a thermal diagnosis to check the actual state of the existing insulation.

Reduce your bills with Avenir Rénovations Luxembourg

Well-thought-out insulation shows results from the first winter following the work: less heating is needed for equivalent, or even superior, comfort compared to what you experienced before, without waiting several years to feel the effects.

Our teams operate throughout Luxembourg City, with a free thermal diagnosis that precisely identifies where your energy losses are before any financial commitment, and comprehensive support to mobilize the Klimabonus aids you are entitled to.

Homes in Beggen and Dommeldange built before the 1980s often exhibit a similar energy loss profile: insufficiently insulated attics, single-wall walls, old single or double-glazed windows. Addressing these three areas together, rather than one in isolation, yields a result significantly superior to the sum of the interventions taken separately, a point we systematically explain during the initial diagnosis.