How much "movement" (difference in width across the face of the board throughout the year) should be anticipated in 5/4 bald cypress flooring/decking if the lumber is properly air dried to 11% before use and if all surfaces are finished with an oil-based product prior to installation as t&g flooring on a covered (but not enclosed) porch? I'd like to use 6" wide boards but am willing to drop back to 4" if it will make a significant difference.
The location is in the Panhandle of Florida but not directly on the coast (approximately two miles inland).
