Try one of these tips to control your home's moisture

VENTS
    Attic vents control moisture and prevent damage to insulation and wood structures. As a rule, there should be one square foot of vent area (net) for every 150 feet of ceiling unless: (1) a vapor barrier is used; or if (2) one half of the venting is provided in the upper portion of the roof and the other half is provided by eave vents. In those two cases, the venting ratio can be one square foot of venting (net) per 300 square feet of ceiling.
    Any home with a crawl space needs foundation vents to prevent moisture damage. When no moisture barrier (a ground cover) is installed, one square foot of vent area (net) is required for each 150 square feet of crawl space. Four vents should be a necessary minimum for most homes without a ground cover.

GROUND COVERS
    With a correctly installed ground cover, one square foot of venting area (net) should be provided for every 1,500 square feet of crawl space. Two vents are, however, a necessary minimum for homes with a ground cover.
    Both attic and foundation vents should remain open year round. This is necessary to maintain proper airflow and moisture control.
    A ground cover of six-mil plastic or 55-pound roofing material will greatly reduce the moisture that can seep through the door. .

STORM WINDOWS
    The installation of storm windows can eliminate condensation on windows, which will prevent mold and mildew from forming. This double protection will also save homeowners money on heating and air conditioning bills by slowing energy loss through glass.

VAPOR BARRIERS
    Vapor barriers, when properly installed, permit the construction of tightly insulated homes without having moisture form on the walls. Vapor barriers are always installed on the warm (room) side of the insulation. Vapor barriers installed in the cold side of the insulation will allow warm, moist air from the home to soak the insulation. When this happens, timber can rot and the effectiveness of insulation can be destroyed.

EXCESS MOISTURE CONTROL
    Ventilating fans are best for removing moisture from the kitchen and bath areas. Any type fan used should be vented outside to prevent the build-up of warm moist air in the attic or crawl space.

TOO LITTLE MOISTURE
    Humidifiers, either permanent or portable, are a good solution to the problem of low relative humidity. After checking to see that a humidifier is certified by the Association of Home Appliance Manufacturers, be sure it has a humidistat before making a purchase. The humidistat will regulate moisture output.