15mm ply on bathroom floor

[DavidJ]

I've discovered the existing bathroom floor is only 15mm ply. I believe this is thinner than regulation requires. The adjoining chip board on the landing appears to be slightly thicker. The previous owner had laid cheap tiles directly on the ply which, to their credit, hadn't cracked in 4 years so it 'seems' solid.

I have some no more ply to go over it and the mega strength adhesive. Should I bite the bullet and change the floor?

 

[HardieBacker]

Can I have some freebies , might use your products 😉. Is the no more ply or Trimline XL the same ?

Send me pictures of you using HardieBacker and I’ll
Happily send you some freebies mate!