On 27 Sep, 17:22, Niall Smart wrote:
I'm renovating a small bathroom and want to tile onto a block wall
that has been finished with a sand/cement render. The 30 year old
plasterwork that was on has been removed - it more or less fell off.
The wall is out of plumb by about 1.5cm bottom to top, and surface
hollows of about 8mm over 2m. I don't think I'll get a good result
tiling onto it as-is

I was originally planning of getting a plasterer in, but was starting
to think about DIY as the final surface does not need to be perfect -
just good enough to take tiles.

What about using something like Ardex AM 100 "Rapid Hardening One Coat
Tiling Render" (http://www.ardex.co.uk/ardex_am100.asp) which
apparently will apply in 2mm-20mm in one coat. How hard is it for a
novice to get a decent result with this type of thing? The short
working time is a bit of a concern.

Another option would be to dot-and-dab 9.5mm plasterboard - but I will
lose more space this way - but it would be a lot easier.

Niall

I agree with the other post

Use 3:1 sand and cement. Add a glue such as Feb SBR to ensure
adhesion.
it is best for an amateur to use the "screed" method whereby you put
on vertical lines about 4 to 6" wide near each corner and get these
absolutely right first (much easier) and once they have set you can
just fill in between
Plastering is not that difficult if you are reasonably competent DIY
and read up on the techniques.
Chris