On Mon, 13 May 2019 11:28:32 +0100, newshound wrote:

On 13/05/2019 10:43, DerbyBorn wrote:
Planning a bathroom conversion - need a 1600 x 700mm shower tray. I need it
raised about 5 inches off a T & G floor. Would rather have a plinth than
legs.
Any recommendation on materials for spacers and for a top surface. I
realise "wood" is a simple answer - but just concerned about long term
shrinkage and distortion. Any particular types I should aim for?

Mine sits on offcuts of flooring joists from an old job, so treated
timber. Having seen how quickly a tiny leak in a sealed space under a
bath resulted in dry rot. For the surface I would use 18 mm shuttering
ply. Think seriously about access to the trap and/or something like a
rodding eye for extracting the stuff that will certainly thrive in the
drain pipe.

I'm changing to no trap inside and a waterless trap outside (having tested
it at low temperature to make sure that it doesn't freeze shut). I'll use
black pipe, to resist UV, with about a foot of black downpipe to cover the
trap.


--
Peter.
The gods will stay away
whilst religions hold sway