priming yes or no

so what type of concrete floor was it then?

 

Power floated. Slabs been down since early 2014, our ardex mvs failed after a few days too.
The concrete seems quite weak like the mix was weak.

 

was the power float keyed?

 

Yes the lads used an str with copper plate I beleive

 

I have never under stood the "sandwich' method. If your putting a screed under the Dpm why waste your time dpming it's going to fail anyway. Ha. It blew my tiny little mind the first time I was told about it.

 

No it's not. Providing you use the correct type of Slc..