G
Gazebo
Hi you can raise a shower tray with an upstand kit (easy plumb kit) but these are usually dedicated to each specific tray.
Some are just plastic leg sets that slot in to pre made holes on the underside of the tray, some are pieces of ply wood with legs screwed to the underside of ply, some are made of box section steel and you assemble them yourself(bathstore).
you could just cut yourself a template of the underside of the tray from 18mm wbp and screw adjustable legs (kitchen base unit legs work.)to the ply. if you do this be sure to leave the ply slightly shy of the exposed edge of the tray so your tile can sit flush to the underside of the tray if you are tiling the upstand that is.
Some are just plastic leg sets that slot in to pre made holes on the underside of the tray, some are pieces of ply wood with legs screwed to the underside of ply, some are made of box section steel and you assemble them yourself(bathstore).
you could just cut yourself a template of the underside of the tray from 18mm wbp and screw adjustable legs (kitchen base unit legs work.)to the ply. if you do this be sure to leave the ply slightly shy of the exposed edge of the tray so your tile can sit flush to the underside of the tray if you are tiling the upstand that is.