Construction description: basement insulation as a white tank

Hello everyone,
in our construction description from the developer, the following is planned for the basement:

"Slab steel concrete, according to foundation requirements, if necessary on gravel fill. Exterior walls steel concrete with applied exterior perimeter insulation up to a height of 1 m below the basement ceiling.
EXTERIOR THICK COATING ON BASEMENT OUTSIDE WALLS. THE BASEMENT IS EXECUTED AS A WHITE TANK UP TO HEIGHT BELOW THE BASEMENT WINDOWS. INTERIOR WALLS CONCRETE OR MASONRY. CEILING ABOVE THE BASEMENT AS A CONCRETE CEILING. The subordinate technical rooms or basement rooms in the basement do not meet the requirements for so-called sophisticated use in terms of lighting, heating and ventilation. It is a pure WU construction as a white tank, for this reason the exterior walls are not insulated down to the slab and also the basement floor remains uninsulated in these rooms. Storage of moisture-sensitive materials such as paper, sugar etc. is not recommended."

Does this meet the requirements for a semi-detached house in which the basement is to be used exclusively as a normal basement room, and not as a living space etc.? Does this type of execution correspond to the state of the art?

Good evening Harry Potter’s friend Dobby,

this is actually a topic for a review/assessment of construction documents

"Ground slab reinforced concrete, according to foundation requirements, if necessary on gravel backfill. Exterior walls reinforced concrete with applied external perimeter insulation up to a height of 1 m below the basement ceiling.

What if no gravel is required, how will the foundation then be done?

EXTERNAL THICK COATING ON BASEMENT EXTERIOR WALLS. THE BASEMENT IS EXECUTED AS A WHITE TANK UP TO A HEIGHT BELOW THE BASEMENT WINDOWS.

Why? Does the basement end below the light well or is only the rest below surrounded by soil? And why is it sometimes called basement and sometimes underground floor?

Does this execution method meet the requirements for a semi-detached house, in which the basement is used exclusively as a regular basement room and not as a living space etc.?

As long as the heat generator is not to be installed in the basement: in my opinion yes. Otherwise, the room intended for this must be insulated and heated.

Does this type of execution correspond to the state of the art?

No one can answer that without knowing the soil report and the rest of the construction documents. From your description, for example, it is not clear which sealing according to DIN xyz is done for the "white tank."

Rhenish greetings

Thank you for the answer. It is a basement level, which is also referred to as an underground floor. The basement has 3 rooms, one of which has a pellet heating system. The other two rooms are purely utility rooms. I am not very familiar with the subject, but I found it strange that the "exterior walls in the basement are not insulated down to the floor slab." I cannot understand whether this is a normal construction method...

Hello,

..... The basement has 3 rooms, one of which has a pellet heating system. The other two rooms are purely utility rooms...... I cannot understand whether this is standard construction...

First of all, refer to the Energy Saving Ordinance/KfW certification. According to this description, the basement as a whole, including the heating system, lies outside the thermal envelope.
The basement rooms must therefore not be used for residential purposes and must not be heated accordingly.
According to the execution here, the basement ceiling seems to comply with DIN 4108 Bbl. 2, which is basically correct!

Regards.