Mold on the basement windows after screed

Dryer will arrive shortly. It's only about the transition period for me. Calcium sulfate flowing screed is installed everywhere as heated screed.

Vapor barrier is in place and the entire envelope is insulated.

Thank you for your explanations.

Gladly - it was also an annoying time for us because despite the cold it was completely wet. We even had drywall, which then started to mold slightly in two rooms - you couldn't ventilate enough, and despite four dryers it happened. Well, it wasn't much and never came back after disinfecting.