In message , Fishter
writes
Hi steve
In you wrote:

Screw some thin ply over the top off the whole lot. Watch out you don`t
screw into any pipes or cables :-0

Would ordinary ply be alright, or is marine ply a better option for the
damp environment?

WBP (water and boil proof?) ply will be fine - which is what most
standard ply seem to be now adays

I've had WBP on my bathroom floor for a few years and it's fine (I've
got some that has been outside unprotected for at least four years and
it hasn't started delaminating at all.)
--
Chris French, Leeds