Decoupling Mat?

[rk11]

Hi,

I'm about to have a bathroom floor done,
its been overboarded with thick marine ply, planning to use large format tiles with thin grout lines, should I use a decoupling mat?

Rob

 

[brian c]

what material are the tiles...ie is it a natural stone or porcelain or other?

 

[rk11]

rectified large format porcelain tile