Tim Lamb wrote:

Shower installed.

Now stressing about boxing the soil pipe run to the toilet.

Simplest is tiling on waterproof ply over treated timber frame. Damp
area and rot issues due to no ventilation?

Can't screw to floor but could glue to ceramic tiles. Anyone done it?

Almost done that. Front of corner toilet frame covered with waterproof
ply (19mm) tiled over. Ply is 6mm off the floor but gap bridged with
stainless steel coving type moulding sealed with tile grout. No sign of
deterioration after four years, which is fortunate because wall mounting
toilet is fixed against it (with bolts from the frame of course). I
think I would be happier with a steel or aluminium frame if the space is
not ventilated.

--

Roger Hayter