HI Tim

Tim S wrote:
Adrian coughed up some electrons that declared:


..so I was thinking about a timber structure, topped with 'green'
flooring grade chipboard - well siliconed around the edges and maybe
varnised...?

I might consider marine ply (or any water resistant variant) topped off with
some tile backer board, eg aquapanel, which will give a totally waterproof
layer. Grout joints *always* spring minute leaks given time, and I think
green chip isn't the best option.

Hmm - I was trying to avoid things that come in 8' x 4' sheets g -
as it's only a 6 x 2.5 that I need (got a shed full of 'left-over'
bits... (haven't we all ?)


Or at least just use marine ply as your not expecting to flood the area any
more.

I'll ask the the local Builders Providers..


In either case, can you arrange some small amount of ventilation from under
the structure to outside the shower room? That will help the timber in teh
long term.

Well - there's the (soon-to-be-redundant) drain from the existing shower
- I was going to seal that off - but I could just leave it open..

Thanks
Adrian