Interior plaster or screed and moisture

I have a quick question about moisture in the house after screed or interior plaster. Our house is currently closed. Doors and windows are installed, ETICS including exterior plaster is applied, the roof is covered. Only the insulation and cladding between the upper floor and the covered roof are still missing. The heating is also missing.

Last week the interior plaster was completed in our house. The moisture inside is accordingly now very high. However, the current weather (rain or high humidity) makes it difficult to reduce the moisture by ventilation. According to the general contractor, we should organize a construction drying (hire a company or similar). Since the screed is supposed to go into the house in 2 weeks (provided the weather cooperates), we were told that we could arrange the construction drying afterwards. Otherwise, it would have to be set up, taken down, and set up again. Do I now have to worry that the roof rafters will start to mold or rot if the moisture caused by the plaster cannot be treated effectively for 3 weeks? After all, they are completely exposed and theoretically subject to condensation if it can form there... Or does this simply delay the overall drying time?

I would appreciate any answers very much. Best regards

Air out as much as possible. Also open Velux at the top of the roof. Then it will work out.

Thank you for the feedback.

So I don't have to expect that mold will immediately form within 3 weeks due to the interior plaster in an unheated house? After the screed, building drying will then be commissioned or the heating system will be installed shortly afterwards, so that it can be consistently heated and ventilated.

Yes, you definitely have to expect that. Unfortunately, some of our wooden windows got damaged back then because we also fell into the misconception that airing out by shock ventilation three times a day is enough.

Depending on the weather, that is not sufficient. Although the amount of water in the interior plaster compared to the screed is much less. The heating-up program pushes so much water into the place that it runs down from every corner.

My recommendation for this time of year: not only after the screed but also immediately after the interior plaster, get three dehumidifiers (professional units) and run them full blast in the whole place.

I would never save money on that. My damaged windows annoy me for a lifetime!

So I don't have to expect that mold will immediately form within 3 weeks in an unheated house because of the interior plaster?

Mold growth requires temperature. As long as it is above 10°C, nothing will grow there at first.

As long as it is > 10°C, nothing will grow there at first.

Tell that to the food in my fridge; they seem to forget that sometimes ;-)