Prepping concrete floors

[Concept PHT]

He wanted it raised by 15-20mil (I cant remember - it was ages ago) to meet the level of an adjoing floor, allowing for 15mil for tiles and adhesive.

 

[Leatherface]

Sorry Concept - I wasn't implying that you were wrong.
The self leveller I use can be applied up to 30mm in one application and is guaranteed not to shrink or crack. My powers of persuasion usually work with the customer.
Anyone that chooses to ply over concrete - fine by me 🙂