Attic insulation in Luxembourg

Our attic insulation services

• Thermal diagnosis and complete attic inspection
• Floor insulation for lost attics
• Roof insulation for converted or to-be-converted attics
• Blown insulation for hard-to-reach configurations
• Ventilation check after insulation installation

Process of an attic insulation project

An attic inspection allows for the assessment of the frame's condition, existing insulation, and ventilation points before proposing the most suitable method for the encountered configuration.

The chosen material and technique depend on the intended use of the attic: if lost, they require simple floor insulation, while if converted or intended to be converted, they require more technical insulation under the slopes.

A standard attic insulation project lasts from one to three days for lost attics, longer for complete roof insulation with finishes.

Insulation and ventilation: a balance to maintain

Insulating without reconsidering ventilation remains a common mistake, especially in attics where air circulates less naturally than elsewhere in the home. A properly insulated but poorly ventilated space easily accumulates moisture, with a risk of mold on the frame in the medium term.

Our teams systematically check air inlets and outlets before any insulation installation, and adjust existing ventilation grilles if necessary. This step, often overlooked due to time constraints, is crucial for the long-term durability of the entire project.

Areas of intervention in Luxembourg City

• Eich, Dommeldange: individual houses with classic attics
• Belair, Merl: villas with attics often already partially converted
• Bonnevoie, Gare: terraced houses with old roofs
• Kirchberg: recent buildings, terrace roof insulation

Regulations and aids in Luxembourg

Attic insulation is among the works eligible for the Klimabonus 2026, the energy renovation aid scheme of the Grand Duchy, provided that the performance criteria set by the current regulation are met.

The super-reduced VAT of 3% may also apply to this type of work for a home over ten years old used as a primary residence, within the limit of the ceiling set for the current year.

Maintaining appropriate ventilation remains an essential technical condition after the insulation is installed, to avoid any moisture or condensation problems under the roof.

Why choose Avenir Rénovations for your attic

A precise thermal diagnosis

Every project starts with a complete inspection of the attic, a necessary condition to recommend the most suitable method and material for your configuration and the actual state of your framework.

Comprehensive administrative support

We guide you through the procedures related to the Klimabonus and reduced VAT, so you can benefit from available aids without complicated steps on your part or unnecessary paperwork to manage alone.

Guaranteed energy savings

The materials and methods we use meet current performance standards, with measurable results from the first winter following the work, without compromising on installation quality.

Profitability and insulation of already fitted attics

Insulating the attic floor remains profitable even without a fit-out project, as it directly limits heat loss to the roof. A well-installed and properly ventilated insulation retains its performance for several decades, provided that its condition is periodically checked. Insulating already fitted attics is also possible, through interior insulation or, in the case of roof refurbishment, exterior insulation that improves performance without losing the use of the room.

Aids, thickness, timeline, and cleanliness of the site

The Klimabonus 2026 covers this type of work under certain conditions and can be combined with other schemes depending on the housing situation. The recommended thickness of insulation depends on the chosen material and the desired performance; a thermal diagnosis allows determining the most suitable value for the roof. Expect one to three days of work for lost attics, about a week for insulation under the roof with finishes included. The blown technique generates a bit of dust limited to the attic, while panel installation remains cleaner but slightly longer to implement.

Clear out or not the attic before the work

For lost attics used for storage, partial clearance is usually sufficient, unless the insulation requires access to the entire surface of the floor.

Enjoy a free diagnosis with Avenir Rénovations

Insulating your attic remains one of the most cost-effective actions to sustainably reduce your energy bill, with a noticeable effect from the first winter following the work.

Our teams operate throughout Luxembourg City, with a free visit that includes a complete thermal diagnosis before any final estimate, with no obligation on your part.

A poorly insulated attic, even in a well-maintained house, remains one of the main sources of thermal loss observed during our diagnostics in Eich and neighboring areas. Many homeowners discover, during a simple inspection, that a relatively simple and inexpensive action is enough to significantly improve their comfort in winter and summer.

Contact us to schedule this free and non-binding inspection: it provides a clear and honest picture of the actual condition of your roof before any final decision on your part.