Laying turf/concrete

[Satriales123]

Hello. Ive just removed 6m length x 1m wide decking. Underneath was some light soil, a plastic sheet lining and then a bit further down some concrete, that stoney type stuff. (Sorry don't know the name)

I have read that laying turf on concrete is not advised but I am looking to use 6 inches depth of top soil which hopefully will be sufficient.

I've read drainage is the main issue, however im curious as to where the water was draining away when the decking was in place? Typical UK, we get heavy rain and have never seen any issues, so no idea where it was draining away!

Any helpful advice appreciated. Thanks.

 

[stevie888]

I doubt grass will last long in 150 soil over concrete. Best to break slab up to allow drainage but failing that a grid of holes would take less effort