Revisions log for Answer #2807

I would also consider the following:

The screed should not lose moisture too quickly, such as at the top, so it doesn't "sand" (my layman's understanding). If the tiler "wants" to work only with difficulty in the "haze" and plows all the windows, the screed may be laid unfavorably and unevenly.

If necessary, negotiate with the tiler that only the windows in the appropriate room will be open, but not the windows across the hall to avoid cross ventilation.