Drywall boards mold?

The gypsum plasterboards were only installed after the heating-up phase. Before that, the moisture was measured several times. There were mold spots on the battens in three rooms. These were completely replaced before the boards were installed and filled. Contact your site manager and clarify this on site.

Please upload the photos here - at least I am not willing to deal with other websites and their advertising stories. In this respect, I cannot see much.

I took the trouble to convert the images

Thank you
With us, it ran - I believe - in parallel, I still remember how the drywall installer told us that the container of the construction dryer had leaked

In this respect: ventilate, ventilate, ventilate - of course, properly!
And it is certainly also weather-related: the humid air must get out!

The problem is just that I can't heat at the moment, so airing hardly helps at all.

The problem is just that I can't heat at the moment, so airing out is almost useless

Heating is not airing out and should be considered differently.

First comes airing out, later comes heating!