As seen below, the companionway boards are almost ready to go. Due to the thickness of the boards, the companionway hatch doesn't overlap the board. Crap! As a result, rain water can conveniently enter between the hatch and upper board.
My 0$ solution to this was to get an old tire tube from these women.....
then, cut it long enough to cover the width of the hatch and use it like a flap to keep water out. Instead, I decided to continue using my winter Meranti Mahogany investment to build a cap for the board.
The cap...
and finally, how it will be installed.......the cap will be mounted to the face of the hatch.