Raising a shower corner tray

[Rachh863]

Hi, I need to raise a shower corner tray, what is the best material to use to raise it up? And would building it in a square shape suffice or do I need to take on board the curve? Thanks

 

[muggles]

Build a plinth out of timber and marine ply. You should make it slightly smaller than the tray, and take on the curve, as the tray should ideally be supported on it's base and not around the edges (on some trays the edges are slightly too tall, so that if you cut the base exactly the same size, it's only resting on the edges and not fully supported on the base)