Revisions log for Answer #1554
This is the answer to the question How do I get rid of mold on the window soffits?
Revision 1
Check how the window is sealed. You may need to reseal it. Be sure to insulate the soffits. Plastic or stucco at your discretion. Put a plastic window sill and also insulate under it.
What about your ventilation and heating? Probably one of the reasons is insufficient heating. And because of the insufficient heating – not enough ventilation. And from that dampness and fungus.
For example, on our top floor the heating was very good, the windows were not closed, there were no problems with ventilation.
And as for windows, even with single-glazed packages – slopes and under window sills are insulated – there is no condensation, no dampness, no fungus.
So I strongly advise to insulate the slopes and under the window sills. And you have the first floor, I would advise to insulate the floor.