We must control moisture in all its forms to keep our homes durable and comfortable. Building components and practices such as flashing, roofing and basement damp-proofing successfully protect the home from liquid water. It is equally important to control the movement of water vapour, providing added protection for the house structure and helping to maintain indoor humidity at a comfortable level. Controlling moisture involves three strategies:
using construction techniques that keep moisture away from the structure
producing less moisture
exhausting excess moisture