Wood, a long-lasting, economical, and renewable resource, is the building material of choice in North American housing. This is largely due to the proven performance of properly designed and built wood frame buildings that have provided strong and lasting housing for a multitude of people. Although wood can withstand much abuse, it needs to be stored and handled properly to perform according to expectations. Managing moisture in structural wood products is essential in order to control swelling and shrinkage and prevent problems associated with mold or decay.