Tim Lamb wrote:

In message , Roger Hayter
writes
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.

Hmm... I've got some aluminium channel.

Any thoughts about securing to the floor? The cistern will bolt to the
boxing and I will follow John's advice on silicone to fix the toilet
base. (underfloor heating pipes).

Assuming screwing it to the floor is inconvenient you could use one of
the structural adhesives for building now advertised. I used something
made by CT1 called "Power grab and bond" which seems to work well where
it has to fill gaps. I didn't try it with aluminium though it claims to
work.

--

Roger Hayter