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The Medway Handyman

wrote:
Can you successfully apply stone tiles over floorboards?

In theory yes, using a special adhesive.

Inpractice IME its difficult to do properly. The sub floor has to be 110%
rigid. That means IMO a layer of 18mm ply screwed down every 150mm into the
joists.

If you do this & follow the adhesive instructions you have a fair chance it
will work.

However I come across many instances where it hasn't worked. Not saying it
can't be done, just saying it has to be done 100% right.

Last job I did was a newly laid 18mm grade 5 chipboard floor. I extra
screwed it down every 100mm into the joists, PVA primed it & used a flexible
adhesive. Two months on I've had to re grout one tile where it had started
to crack a little.

--
Dave - The Medway Handyman
www.medwayhandyman.co.uk