Rip up sub-base or screed over it? - Use screed as patio surface

[donnerblock]

Is it possible to use screed/pointing material as the SURFACE of a patio?

I removed the broken crazy paving from our 6 m x 2 m patio in preparation to lay 400mm x 400mm slabs. I thought that all of the sub-surface was friable (the first bit I uncovered broke up easily). But it has turned out to be solid as a rock, and 150mm thick over 90% of the area.

Aside from the fact that it is going to be a real job to rip this sub-base up, the area includes two rectangular drain covers (one of which is at a 45 degree angle to the house, and seems to be fused to the sub-base) that are going to be difficult to incorporate into the slab layout. So, screeding the existing base with the same material would solve a lot of problems.

The patio will only have a table and chair set, and a few pot plants on it.

Thanks in advance for any advice.

[lutonlagerlout]

its not correct donner
if you lay new bedding material over old your IC covers will be low
for 12m I would say get the kango out and break it up

its hard to say 100% without seeing the site

LLL

[donnerblock]

Thanks for the reply, Luton.

Is it possible for me to add pics here?

[seanandruby]

We always like to see photo's, it gives us a better understanding of what you want. Go to the noticeboard on the main page and it explains how to upload them, if of course you don't already know how to :;):