help with problem concrete floor

[Grace'sDad]

I have to quote to fix tiles to a large hall. It's a concrete floor but the hall is made of two halves, both pretty old. One half (a later extension) has settled differently to the original and as a result, there is a small "San Andreas Fault" running the length of the hall.

Now I'm pretty sure that any movement will have settled after 40 years, but it has left a variation in height of between 5mm and 20mm along the length.

Has anyone faced similar???

I thought I could hire a concrete scabbler or diamond grinder (with dust extraction) and level this, then use something fancy like Schluter's Dilex expansion joint which allows vertical and horizontal movement.

Whatsyathoughts???

Thanks!

 

[White Room]

Why don't you use self leveler to bring the floor up level.

 

[Grace'sDad]

what? 5-20mm over 10m length? I'll be there all year!

 

[White Room]

oops, Did'nt realise it was 10m long, How about a screed mixed with sbr and a slurry again mixed with sbr just before you lay the screed, I've done this quite a few times even on external work and go'es rock solid