ᐅ Height difference / Level between tile and wood flooring

Hello,
the parquet flooring was installed in our house at the end of last week.
It was planned for the screed to be lower than in the adjacent rooms (kitchen and hallway).
We do NOT have any "extra-thin" parquet, which apparently exists for cases without a lowered screed.

Nevertheless, the parquet is now about 1.2 cm (0.5 inches) lower than the adjacent floor level. Our site manager and the flooring installer say this is "normal" and therefore not a defect. They claim there are no specific guidelines or standard measurements.
We find this very disturbing because such a large difference cannot simply be adjusted by "overlaying" the floor.

Online, I only found one reference in regulations for public areas regarding this issue.
They consider a difference from 4 mm (0.16 inches) upwards as a tripping hazard.

Could anyone tell me if it is possible to apply these kinds of standards or recommendations to private homes in any way?

Raising the floor level is unfortunately not an option because it would significantly affect the function of the underfloor heating.

Best regards,
Hilaria

Do I understand correctly that there is now less screed under the parquet compared to the kitchen and hallway? How much difference was agreed upon beforehand, and what has become of that agreement? Who decided by how much the screed in the room should be lower?

Hilaria schrieb:

Raising the floor unfortunately isn’t possible, as it would significantly affect the functionality of the underfloor heating.

Regards,
Hilaria

That’s nonsense, as long as no 15mm (approximately 0.6 inches) insulation layer is installed underneath...
With leveling compound, the 15mm (0.6 inches) can be easily compensated for without affecting the underfloor heating. Technically, it’s not an issue; the question is who will cover the cost.
The screed thicknesses seem to have been planned already. Was this documented in writing or drawings?

Just for my understanding:
What is the height difference at the unfinished floor slab? What is the covering next to the parquet?

We have tiles and parquet side by side, both at the same screed level. So I don’t understand how a 1.2cm (0.5 inch) difference is possible.

Hello,
we have tiles and parquet flooring installed side by side. This is also specified in the construction plans.
We are building with a contractor, so I don’t know who calculated what and where.

Both the site manager and I were present when the screed was poured. Thinner screed was deliberately applied in the living area where parquet was planned.
So everyone was aware of this.

Why this difference has now occurred, I don’t know. Possibly the screed in the living area is too low, or perhaps the leveling compound under the tiles is too thick.

The fact is, the difference exists. The contractor says it cannot be fixed, although I currently don’t know how thick the insulation under the parquet is (claim: the function of the underfloor heating is severely limited).
My concern now is whether this difference counts as a tripping hazard or if we can report it as a defect.
Since there are no specific regulations for private homes regarding this, I wanted to ask if anyone knows whether this is considered a defect.

Regards
Hilaria

You are avoiding the questions. Someone must have decided that the screed should be lower than in other rooms. How is the screed installer supposed to know what type of floor covering you want?