"Levelling" a concrete floor

Me neither.

Best I can suggest is too lay a grid of strings, or battens, over the top and simply do it slowly bit by bit by eye and measurement.

Use levels laid on the grids to get the level precise.

Should be. Or simply chip it up and re-level.

As it happens I have a similar problem on the near horizon - I have a floor where the screed for one half was laid at a later date to the other, and there's a fairly slight but discernable ridge at the junction, which will inevitably show through the intended vinyl floor covering.

If this was dry plaster on a wall, then I'd be getting out my orbital sander - but what's the tool to use for a concrete floor? Something on an angle grinder, maybe?

Thanks David

A concrete planer will make your surface planar and plainer

Latex screed can be sanded with an abrasive disc. Concrete probably not

orbital

Something on

The hire places will hire you a 'concrete grinder' that flatens floors

AWEM

David

self-levelling floor screed? i used it in my house. worked fine.

dave cowell, germany

You didn't mention the length of the problem.....

It might be possible to do it with an angle grinder and suitable blade.

What about solving the problem a different way and using a sheet of ply?