Moisture, moisture go away. Oh how I wish for a dry, dry day. If your house sings that song, you need to take steps to control it. Moisture is a natural part of our lives.
Moisture causes doors and windows to swell and stick.
Musty odors, mildew and mold muck up our furniture, clothes and carpets. Moisture causes mildew to grow indoors and outdoors. Mildew is black and can easily be mistaken for dirt. To identify mildew, apply a drop of household bleach to the discolored area. If the discoloration disappears, it is mildew and must be removed before painting.