Low quality floor slab

[Ajax123]

Thanks for all replies! Well I certainly felt like running away screaming when I saw it, already had to take the walls back to bare brick, insulate, board and skim which I finished last weekend!

I don't think I have time to replace - from what I've removed in the worst bit in the middle there is around 1.5 -2 inches of concrete on a combination of the old brick floor and earth / sand. So I would have to rip up slab, dig down at least 6 inches, pour a slab with re-bar and wait for it to dry enough for insulation and screed. I can't see it would ever by dry enough to tile ahead of kitchen fitting.

Driving force is daughters wedding, she and new family coming over from States early December hence drop dead date for fitting....divorce being the probable alternative! So starting to think best repair I can followed by engineered wood on a proper damp proof underlay may have to be the compromise.....

You can cover concrete as soon as it is hard. Why do you need rebar?? Pour one day cover the next using 1200gauge polythene. Insulate and overlay it with 500gauge polythene then screed using a rapid drying screed. The whole thing could be done in a week...two at the most...

 

[AliGage]

You can ditra over the final screed too once its dry enough to walk on.