- for foundation in a slope or ground pit
- vestibule 100cm deep
- for the installation of double doors, external and internal
- monolithic, robust construction
- arch-shaped retaining wall in the upper part
- extension of the basement with additional chambers while preserving watertightness
- foundation of the cellar under the building, driveway for cars, terrace, gazebo
- electrical installation with fittings
- ventilation system with accessories
- interior finish and door fitting options
- individual customisation