Thanks for all the advice. Given that no one has suggested an alternative to ply then It is clear (given that I want to reduce the height difference) that if I want a quality Job that I should use 25mm ply. Thanks again.
There are a number of threads that provide guidance on how to tile on to wooden flooring but I would like to ask for specific advise. This being. I want to lay ceramic tiles in my upstairs bathroom
, which is boarded out with 18mm chipboard, whilst minimising the height difference between old...