Dave Liquorice wrote:
If time is an important factor stop faffing about and just rip the
lot down, then reboarding and skiming will be quicker. Though that
depends on how good you are at skimming and if you'd need to get a
man in.

If you're going to retile, you can get a good skim finish as
an amateur as you don't need to get a polish on it. I was quite
impressed with what I was able to do to prepare a wall for tiles.

Fully agree with ripping it down and replacing, though.

jgh