Heavy "wet" decking should be spaced with no more than a 1/16" gap as shrinking will occur. Lighter "dry" decking should have at least a 1/8" gap to allow for swelling.
Heavy "wet" decking should be spaced with no more than a 1/16" gap as shrinking will occur. Lighter "dry" decking should have at least a 1/8" gap to allow for swelling.