ᐅ Large gaps in the parquet flooring, underfloor heating

Hello everyone,
since this heating season, our parquet flooring has developed wide gaps. We have underfloor heating, the room temperature is set to 21 degrees Celsius (70°F), and the humidity is about 37%. The gaps are especially noticeable in rooms where the heating is set to levels 3-4. In other rooms, the underfloor heating is turned off, and there the gap formation is much less pronounced.

We have lived in the apartment for two years, and this was not noticeable during the previous heating season.

What could be the cause? Does anyone have an idea? Is the humidity too low? Has the parquet "dried out"? Is it still possible to "fix" this? Should we use a humidifier? Can the gaps close again?

@KlaRa can probably provide more information on this...

It would be helpful, but definitely easier to understand if you share more details.
Is it a private apartment or a rental?
Click-lock flooring or fully glued down?
Did you install it yourself?
.
.

We have been living in the rental apartment for two years. The parquet flooring is 8 years old, so we did not install it ourselves. We assume it is engineered wood flooring, but unfortunately we are not completely sure.

Korin86 schrieb:

Since this heating season, large gaps have been appearing in our parquet flooring.

I only see small gaps in the pictures 🙄 , so quite normal ones.
Please describe your concern and the actual situation in millimeters (inches), not just as large or small.
I don’t think the landlord will replace the parquet based on this "damage pattern."

Nida35a schrieb:

I only see small gaps in the pictures 🙄, so completely normal ones.
Please describe your wishes and the actual state in millimeters, not as large or small.
I don't think the landlord will have the parquet redone for this kind of "damage."

Ok, sorry 🙂 The gaps are about 0.5 mm (0.02 inches), and 1 mm (0.04 inches) in one spot. It’s not that we want a replacement. We were just surprised because the floor had been fully tight until now. Of course, we don’t want it to be said later that we damaged the floor.

Korin86 schrieb:

Of course, we don’t want it to be said later that we damaged the floor.

The floor looks fine as parquet,
it is wooden flooring that changes its joint pattern over the years.
What I also noticed is that there are some grayish spots on the joints of the wood, which result from being too wet and frequent mopping, or something was spilled there.
I actually like slight wear and tear; that’s the difference between parquet and laminate, vinyl, tiles, and so on.