Browse Forums Paving & Concreting 1 Mar 18, 2019 1:40 pm Hi guys & gals, I have been reading on the forum and gained some great ideas. Not long bought a property on the Sunshine Coast and we're experiencing some very poor drainage in our backyard. We are on a 1 acre property sloping from the back to the front. To give you an idea, from the rear boundary fence there is a 5.5mtr wide garden bed retained by a rock wall that has agi pipe behind it, then up to 4mtr wide turf up to the back of the house. Whilst the block is sloping from the back to the front, the turf at the back of the house is flat. As I understand it, the turf is sitting under a shallow sandstone rock bed which the previous owner filled with soil and turfed over. We had minor flash flooding on the weekend (standard tropical QLD) and the turf is spongy and water is sitting at the house as noticed by a darker brick and efflorescence. I'm guessing sub-surface water is soaking into the turf, hitting the rock bed and migrating forward towards and under the house. I had firstly intended on tearing up the backyard (it's a big yard!) and starting again. We have since decided to install an agi pipe at the base of the retaining wall, not turf over the top of it, instead leave a rock edge to assist with drainage and redirect water around the house. With some digging over the weekend, I'm confident I can get a min 350-400 depth. To correct the falls at the house, I intend on getting a 900-1000mm concrete path around the rear of the home to create a barrier, fall and functional path. I also intend on running an agi pipe parallel with the edge of the concrete path to be doubly sure. If the problem still occurs, we will remove remaining turf, add pit drains and re grade. Have I missed anything? I'd appreciate any ideas or advice. Thanks Recently I moved to a 30 year old house and found within few months there are small brown nests in the brick mortar and few small round holes in few places of brick… 0 22683 6 4359 DIY, Home Maintenance & Repair I'm in WA and our sandy soils make drainage a bit easier but this is what I'd be doing. Dig down to your footings and let the wall dry out. Clean it all well by brushing… 1 5197 |