Browse Forums Paving & Concreting 1 May 28, 2010 2:28 pm Does anyone know how large your area of concrete or stencil crete used for entertaining including the driveway and side enterance needs to be before a drain needs to be included? I vaguely recall 1.2 Mtres. I'm concerned about runoff from an adjoining property in heavy rain and potentially flooding our backyard. 2 6395 I would find out how deep your clay base is and depending on the depth install a cut off drain which is more than a normal agi drain. Where the neighbouring walls is… 2 3452 13 7100 |