Tim Lamb wrote:
In message , Tim S
writes
Tim Lamb wibbled:


Hmm... so it has to be a *click* version? What about the membrane they
seem to insist on?

I used Tredair Boardwalk - seems successful. It's a 4mm dense underlay
with
acoustic reduction properties and an integral vapour barrier (foil top).

OK. Noted.

So 15mm for Kahrs mid range plus 4mm underlay.... I'll ask the builders
to allow for 20mm flooring in the main area. On line ceramic tile
suppliers are rather coy about publishing tile thickness but the
existing total 13mm so I may attempt a different screed height for the
entrance and shower room.


4-6mm decent floor tiles. Add 3mm for cement over screed, and more like
6mm over wood. Its easy enough to spend more on tile cement and make the
bed thicker ..in my case up to 20mm to allow for crap screeding.


regards