I am replacing various pieces of the ship lap Cyprus siding on my house. Some pieces of it have started to have some rot at the very bottom edge. A friend suggested putting some caulk across the bottom edge of each board to keep it from wicking up the board. I was thinking that might keep water in. I even thought of putting Flex Seal on the bottom of each board. Any thoughts? Is it worth the effort. The siding is original from 1979 so the new boards will outlive me as is.
