Southern cypress siding is a quality wood product dried in accordance to the Standard Specifications for Grades of Southern Cypress:
Finish Grades: 15 percent maximum moisture content.
Common Grades: 18 percent maximum moisture content.
Siding material must be conditioned to the local average in-service moisture content before installation, usually between 8 and 16 percent. Store in an unheated structure or under cover until application. Southern cypress siding may be temporarily stored outside if at least 4 inches off the ground and on a fiat, well-drained surface protected from moisture with a shed pack or waterproof cover. Do not seal the unit because ventilation is necessary to prevent condensation and ground moisture absorption, which may cause mildew or mold. Special care should be given to material, which has become wet during storage (i.e., broken units, etc.,) because it may shrink and open gaps at the joints after application.