Check your basement for moisture or leaks by taping a piece of plastic or tin foil on the foundation wall.
Remove moisture from the inside of your home.
Use a dehumidifier if necessary.
Check gutters and downspouts for debris and clean them when necessary.
Slope your land and driveways away from your home.
Install French drains and foundation drains to redirect water away from your home.
Waterproof your walls.
Install a sump pump in unfinished basements or under foundations to remove excess water.