Too much moisture in the single-family house after screed installation? Risk of mold?

Does anyone have tips / tricks for the "tropical screed ventilation time"

For the ceiling:

inexpensive window vacuum cleaner with telescopic handle for the ceiling - worked excellently on concrete ceiling
For windows, just use a different one or thoroughly clean the wiping lip - the risk that material from the ceiling sticks to the rubber lip and scratches the glass would otherwise be too great for me

Alternatively, if available: wet/dry vacuum cleaner. Very effective. But take the bag out beforehand ;)

Now a question. Do you actually have any idea how many liters of water are brought into the house just with the screed?

And where is the water supposed to go in your hermetically airtight insulated and sealed houses with the KfW55 nonsense? And all the drywall sheets, which really absorb the moisture. Because these houses can no longer breathe naturally. It’s even worse with anhydrite screed. Even more water in it.

So I naturally wonder if you ever really get the moisture out of the house again. Because then the tiler comes, even though there is still moisture in the screed. I know someone who still had moisture under the tiles after 10 years.

Surely it was exceptionally humid in the last few weeks. Yes. There will certainly be a few more frosty nights with very low humidity. Then turn on the heating, open all the windows, and let it dry.

Actually, heating isn’t needed at all. But since you have already filled the heating system, it would of course freeze up. So put antifreeze in and let the frost into the house. Then it will dry quickly and naturally. Without mold.

Now a question. Do you actually have any idea how many liters of water are brought into the house just with the screed?

And where is the water supposed to go in your hermetically airtight insulated and sealed houses with the KfW55 nonsense?
And all those drywall panels, which really soak up the moisture. Because these houses can no longer breathe naturally.
It’s even worse with anhydrite screed. Even more water in it.

So I wonder if you can ever actually get the moisture out of the house again. Because the tiler still comes even though there is moisture in the screed. I know someone who still had moisture under the tiles after 10 years.

Surely it has been unusually humid in recent weeks. Yes. There will certainly be a few frosty nights with very low humidity. Then turn on the heating, open all windows and let it dry.

Actually, no heating is needed. But since you have already filled the heating, it would of course freeze you. So put in antifreeze and let the frost into the house. Then it dries quickly and naturally. Without mold.

Basically, you are right about the “residual moisture,” which will certainly remain. There are certain numbers that tilers etc. orient themselves by. If the percentages are met, tiling is allowed. These values don’t exist for nothing.

Try drying your screed at these temperatures in this season WITHOUT heating... Then you will still be drying in May. The trades have to continue, planning goes on, and the client wants/has to move in. The possibility through underfloor heating and construction dryers also exists. Especially with regard to mold, with proper ventilation behavior the mold problem is no better or worse than if I were working without underfloor heating. On the contrary... It has absolutely nothing to do with it. You can get mold just as easily if you ventilate the screed poorly WITHOUT underfloor heating.

As it works for us and certainly for many other constructions, it is standard... So far I have never heard anything bad about this, except that you have to pay decent electricity costs.

The temperatures would still be good, provided you have a heater. The humidity outside is currently the problem.

The temperatures would still be good, provided you have heating. The humidity outside is currently the problem.

Actually works for us in BaWü, I have to say. Sure... in the morning you still have relative humidity outside - but at midday currently quite cool temperatures for the screed. 10°C with sunshine - I can leave it open nicely. I would almost say that the current temperatures are very, very good for drying - significantly better than in late spring/summer. In combination with heating by underfloor heating, that is really cool.

Ah ok, it feels like it's been raining nonstop here (slightly exaggerated). I'm already growing webbed feet and gills.