My front doorstep is flush with the drive and with the internal floor, and very heavy rain leads to flooding. I want to fit a removable flood-resistant board, not more than 15cm high. Floodgates UK sell a gate that would do, but it's £300+ and much higher than I need. Also, the Floodgates product seems to come in a choice of bright blue, and my house, based on a C19 cottage has a black door and white walls; if I make my own flood defence I could have it in unpbtrusive black Any advice and suggestions would be welcome. The door jambs are wooden with a brick surround and the 'step' is stone.