Getting rid of moisture from the shell construction - how to ventilate and other topics

get yourself a few powerful fan heaters, e.g. gas-powered, and heat up the building. Then properly air out the room and you will see that it dries out in no time.

But be careful not to let the oxygen run low. It's best to get a construction dryer and at the same time buy two to three cheap fans. A construction dryer uses between 5 and 8 euros of electricity per day, which is certainly manageable. A construction dryer generates some heat on its own but doesn’t work anymore if it’s too cold inside the house. Ideally, it should be around 12-15 degrees. Using a fan heater for a few days definitely makes sense.