Had a pre start meet today, to discuss the floor prep at a new site. What are your thoughts ? Nice eh ?
Ive just finished one just like this maybe a bit worse but i cheated and got a builder to come in and lay fresh concrete first
New concrete floor would be nice and at least give you a fighting chance to start off on the right foot. Maybe ask an ardex or mapei rep to visit site and take advice from there. Looks like a few different grades of subfloor your dealing with
a concrete or sand & cement screed to good depth or a good going over with pneumatic scabbler and loads of slc af
It's fine...get some laborers to clean it up...vac all the dust, self-level it, feather the edges, sand, vac, mop....good to go. The worst prep jobs are the ones you don't get to do yourself....
Did you look at the pictures ? I`m not sure what self level you use, which will stick to de-bonded, sandy, failed concrete screed, but we don`t have it here