The two sides of my mother's living room are covered with mildew. I will appreciate help in figuring why, it does't seem to fit the typical condition that causes mildew.
Here is some facts about this room... the Bay Area house is located several blocks away from ocean. Weather is foggy and cold most of the time. The house has a box shape, with the living room faces the ocean. The window is open for at least one hour daily. The room is not unheated.
In this room, only the two sides, which are also the two sides of the house, has mildew. The side that faces ocean doesn't appear to have any. These two walls are also covered with fine cracks. From a distance, they look like spider-webs. There are other rooms that share the same sides of the house, but they don't have mildew on it.
Thank you for your help.