How do I know if I have Mildew?
If you have black, gray or brown spots on the paint film or caulking, you probably have mildew. Mildew thrives in damp areas that do not receive direct sunlight like bathrooms, kitchens, and laundry rooms. To avoid problems with mildew, it is important to use high quality paints and ensure that the surface to be painted is completely free of mildew before applying a coating. Glossier paints tend to be more mildew resistant.