Finished parquet tolerances between rods

Hello,

we are somewhat concerned about our future parquet flooring and hope to find help here.

In our apartment, a 2-layer engineered parquet is to be installed. After seeing the installed parquet in another apartment, we are worried about the installation in our apartment.

The planned installation is:
Material: Oak parquet (490*70mm with 11mm height and a 3.5mm wear layer)
Laying pattern: herringbone

The problem is the transitions between the individual planks in a row. In the other apartment, the height difference between the planks could be seen and felt very clearly. It is estimated to be about the thickness of a credit card. Our concern is that people might catch on it (e.g., with felt gliders) and could also injure themselves when walking barefoot.

On the manufacturer’s website (see above) it says "extremely precise" – so should this problem occur during installation?

The difficulty is that neither the construction and equipment description nor the apartment passport define anything.

What tolerances would apply in this case?
Can a better installation be demanded or agreed upon?
Can the problem be reduced afterwards? (Without completely sanding it down.)

Hello, we are somewhat concerned about our future parquet flooring and hope to find help here. In our apartment, 2-layer prefinished parquet is to be installed. After seeing the installed parquet in another apartment, we are worried about the installation in our apartment. To be installed for us: Material: Oak parquet (490*70mm with 11mm height and 3.5mm wear layer) Laying pattern: Herringbone The problem is the transitions between the individual planks in a row. In the other apartment, the height difference between the planks could be seen and felt very clearly. It is estimated to be about the height of a credit card. Our concern is that people will catch on it (e.g., with felt gliders) and could also injure themselves if walking barefoot. On the manufacturer's website (see above) it says "extremely precise" – so should this problem arise during installation? The difficulty is that neither the construction and equipment description nor the apartment pass defined anything. What tolerances would apply in this case? Can a better installation be demanded or agreed upon? Can the problem be reduced afterwards? (Without completely sanding down.)

Are you sure that the height difference also existed after the final sanding? Surely the specialist for this trade can provide answers...

Are you sure that the height difference still existed after the final sanding?

This is engineered hardwood flooring, where the finish is already applied to the planks. It is only laid (glued) and then it’s finished. Otherwise, engineered hardwood can be sanded once or twice, but that is not done after installation, rather after long-term use.

We have installed prefabricated parquet several times already, and it was always precisely fitting, i.e. just as flat as you know it from laminate. I would never tolerate such unevenness; in that case, I would rather choose another manufacturer. If it is lacquered, it must be absolutely flat anyway, otherwise moisture will get into the unprotected edges. Only with normal parquet are such edges normal, as the parquet is sanded after installation.

Best regards
Sabine

small update: We were able to inspect a few boxes of the material today and found that it fits extremely well. The rods all matched up nicely and there were only very small gaps between the rods. Some rods were slightly bent (2 to 3 mm over 50 cm) but that should be resolved during gluing? Otherwise, I suspect that poor workmanship or inferior material was used in the other apartment. So we'll see how it looks in our apartment after laying.