Up date on gyvlon screed prep - Tile Advice

[merit]

Hi all
After seeking advise on machine to best prep anhydrite screed
Hired a machine with diamond disk as opposed to sanded disks
Screed been down a while so lattience baked on
Diamond done the job , may have struggled with anything else
There are cracks at doorways and a couple of small cracks in different
Parts of the floor
Expansion joint round perimeter
Is this drying too quick and shrinkage or something more sinister
3different rooms one continuous pour
Cheers

 

[Dumbo]

How many square metres is the floor . What is the floor build up. How long was it down before heat introduced . Was heat introduced at a low rate and raised in increments . How thick is the screed .