DevonR

Hello,

to start with have any of these quotes come from tilers with experience of using natural stone? Many tilers will quote on these but don't have the experience of how to lay and treat them.
Secondly I would question 6 or 9mm ply, British Standards says 18mm minimum and if your using heavy stone then less than 12mm will probably not support the weight.
I'll let one of the guys who have experience laying natural stone advise on timescales and costs as natural stone does cost more to lay than ceramic you also have to seal it as well, does you quote include sealing?