Gardening & Landscaping

Please help!!! Laying patio over concrete and soil?

Anonymous user 03/03/2024 - 3.38 PM

I would really really really appreciate some advice! We have recently removed our old decking and want to install a new patio. The entire are is about 4x 4 metres- half of this appears to be soil and small rocks which is no issue- however half of the area was old patio. We have just spent a couple of hours removing the old patio, most of it came up fine but there appears to be an area approx 3 x 1 metre where underneath the old patio is a layer of even older concrete?! It’s a good four or five inches thick. I’m thinking it might be the concrete that the old slabs were laid on but not sure. So will we also need to keep taking this up until we find a layer of soil, or is there a way to lay a new patio on top of it, my confusion being that half the area is soil and the rest is now uneven concrete. Any help gratefully received! The concrete is currently two bricks' depth below the damp course so I'm thinking we wouldn't want to raise it by more than a brick in height?