Which way do you do it?

[Dumbo]

After speaking to schluter they say their preferred method is to fill in holes with adhesive and create ribbed bed in one pass. And ditra should be no more than 10 mm from tiles as some others on here have stated . Although they say you can do it

 

[J Sid]

used to put ufh wires on top 10 years ago then they said not the best way to do it

 

[LM]

I'm quietly convinced I was told on Schluter training course 5mm slc over Ditra was ok, ALTHOUGH not preferable.

Same here Marc. I was told that provided it was a 'GOOD' slc then it wasn't a problem.