Price for fit-out of attics in Belgium

2 - The current condition of the attic in the residence

The cost of fitting and insulation work for convertible attics will be lower than that of a non-usable attic, for an equivalent usable surface area. Convertible attics benefit from an interior height of at least 1.80 m. These volumes are ideally located under a roof with a slope greater than 35°, allowing the framework to free up enough space for effective implementation.

As for non-convertible or lost attics, the roof angle is below 30°. The height available under the framework is also less than 1.80 m. In this type of configuration, the load-bearing structure is sometimes very dense, complicating the fitting operations.

Our company specialized in insulation work and attic insulation examines the condition of the building's structure as well as that of the secondary work. Whether the project concerns a convertible space or a unusable volume, this analysis allows us to determine the architectural elements to modify, reinforce, or replace to ensure safe and durable work.

Preliminary interventions on the structure or on the roofing lead to a significant increase in the total budget. For the development of a non-usable attic, costs can quickly rise if a wall height increase is necessary. In this situation, professionals remove the old roofing, raise the load-bearing walls, then reinstall the roofing and insulation.

3 - The type of interventions needed for the attic transformation

The layout of the attic can be limited to structural work (if necessary) as well as finishing work. Avenir Rénovations then creates an insulated space ready to be decorated according to your wishes. Depending on the technical constraints of the location and the owner's objectives, the volume of work required can vary greatly. This directly impacts the final cost of the transformation.

The choice of materials and installations to be integrated also plays a crucial role. For example, for attic insulation, external implementation ensures excellent roof waterproofing. However, this method provides better energy performance but is more expensive than interior insulation.

The choice of partitioning elements in the attic is also essential to guarantee optimal thermal comfort. Hollow core panels, plasterboard, or bricks are the most financially accessible solutions. To improve acoustic and thermal insulation, walls made of glass, solid wood, or cellular concrete represent more interesting options, even if their purchase price is higher.

For the integration of a window, it is possible to opt for roller shutters, which are generally more economical than a large bay window. Sometimes, it is necessary to create direct access to the new floor. If you have sufficient space, a straight staircase can be installed, offering comfort and aesthetics, but involving a higher investment. In more restricted areas, a spiral staircase or a retractable ladder is a significantly more affordable alternative. Furthermore, the total budget will increase if you want a fully finished transformation.

Our renovation company takes care of finishing operations: floor coverings (tiles, carpet, polished concrete, wallpaper, etc.), wall painting, or furniture installation. The final works may also include the fit-out of a kitchen or a bathroom in the reorganized attic. The cost of a complete "ready to use" service will naturally be higher than that of a space to be finalized.