I'm just in the process of laying a new patio, approx 9m x 3.6m, in 600x600 concrete slabs.
On Saturday I got the 4 inches of hardcore down and whacked and have constructed what seems to be a pretty firm base with the appropriate run off.
Yesterday it rained solid for 24 hours!! Now beyond my hardcore base I have a bit if a trench which I plan to build a retaining wall out of new railway sleepers approx 2 foot high.
This trench is currently full of an inch or so of water - at least that shows the run off is OK!! The soil is clay mostly although the garden is surrounded by Oaks which normally drink most of the water!!
Should I try and install any type of drainage between the edge of the patio and the retaining wall? Some sort of gully, or just a gravel channel? I know yesterdays rain was pretty excessive but I don't want to end up with a lake where the patio should be!!
I was planning to just bed the sleepers on a couple of inches of mortar just to help level/set them - the finished wall construction will be pretty self supporting as it has a few right angles in it, and will obviously weigh an absolute ton (20 - 25 sleepers).
I don't think I could get any kind of drainage connected up to any of the house drainage that easily and was hoping some sort of "natural" soak away would be easier if it works that is.
As usual any advice gratefully received.
On Saturday I got the 4 inches of hardcore down and whacked and have constructed what seems to be a pretty firm base with the appropriate run off.
Yesterday it rained solid for 24 hours!! Now beyond my hardcore base I have a bit if a trench which I plan to build a retaining wall out of new railway sleepers approx 2 foot high.
This trench is currently full of an inch or so of water - at least that shows the run off is OK!! The soil is clay mostly although the garden is surrounded by Oaks which normally drink most of the water!!
Should I try and install any type of drainage between the edge of the patio and the retaining wall? Some sort of gully, or just a gravel channel? I know yesterdays rain was pretty excessive but I don't want to end up with a lake where the patio should be!!
I was planning to just bed the sleepers on a couple of inches of mortar just to help level/set them - the finished wall construction will be pretty self supporting as it has a few right angles in it, and will obviously weigh an absolute ton (20 - 25 sleepers).
I don't think I could get any kind of drainage connected up to any of the house drainage that easily and was hoping some sort of "natural" soak away would be easier if it works that is.
As usual any advice gratefully received.