ABWA

4. Mechanical Water Stop:

Having the waterproof tray 6mm above floor level gives a mechanical flashing seal beneath shower screens when installing Hob-less showers. Water falling to the floor wastes either side of the shower screen, Details on pages 74, 79 of "The Bathroom Book". Originally defined in "The Bathroom Book" in 1989 it was opposed by vested interests but is now the accepted method of ensuring a successful waterproofing outcome and is now the accepted Australian Industry standard.