Proper Ventilation/Drying of Interior Plaster / Drying Time

Hello everyone,
are there physicists or experts knowledgeable in physics here?
I am concerned with the drying of interior plaster.

In our new building, the interior plaster was completed the day before yesterday, and we are now thinking about how to get the moisture out of the house or the walls as effectively as possible and without much damage, especially in the basement, which was also under 25 cm of water about 2 months ago. (We have a hillside house, so the basement is half underground, the other half rises above ground level halfway. We therefore have 4 normal windows above ground on this side of the basement.)
From various guides and through some construction workers as well as a building drying company, we have learned that in summer you should only ventilate at night, i.e., when it is at least 5°C colder outside than inside, NEVER during the day when it is hot. Scientifically, this also makes a lot of sense based on the saturation curve of water vapor. Now the question arises: does this apply only to finished houses, or also to fresh interior plaster to dry it quickly and effectively? We have read in other forums that after interior plastering, ventilation should be continuous during the day and not at night?!

Especially in the basement, we want to avoid making mistakes here to prevent mold formation!

Currently, during the day, the house has about 82% relative humidity at 22-23 degrees. In the basement, it is 90% relative humidity at 18-19 degrees.
If we ventilate at night, the temperature lowers to about 17-18 degrees with around 70% relative humidity.

The next question is: how long should you wait after interior plastering before installing the floor insulation? Could residual moisture from the plastered wall possibly migrate into the insulation and cause damage?

Many heartfelt thanks in advance for your answers!

Best regards
hausi2016

The next 4 to 6 to 8 to 10 weeks you won’t be able to do much. Your house will currently resemble a dripstone cave and the current weather is not very conducive to the condition. Your target size will be to get below 60° at 20° indoor temperature. But keep in mind, eventually the screed will also go in, adding a few hundred liters of water into the building.

First of all: What does the interior plasterer say about ventilation? What does the architect or construction manager say?

And then what I think I know as a layman: It makes no sense to ventilate continuously if the climate outside is not significantly better. Ventilate by shock ventilation instead of continuous ventilation. And if it dries too quickly, that is not good either, as cracks can form. The latter probably won’t happen at the moment unless technical assistance is applied.

Thank you for your quick response!

And the floor insulation? Can it be installed, or should one wait until the plaster is no longer so damp?
When is this recommended?

Thank you!

He doesn't really care, because it doesn't draw any water.

But under the current circumstances, I would definitely dry it technically and ventilate preferably at night, which is usually a bit more difficult organizationally.

So set up dehumidifiers during the day, turn them off at night and ventilate accordingly.

Yes, we will just do it like that now. It will probably go wrong.

We are just afraid that mold could develop in the basement due to the residual construction moisture.

Thanks for the tips!

Only organic materials can mold.

I would not intervene technically after 3-4 days but spend about a week ventilating accordingly. Drying too quickly is also not optimal.