You have to leave space for the waste and pipe to run in the floor,so you can not install the tray on a concrete floor.If you want to install the tray on a hard floor,pls buy the riser kit from us. Bi-fold Door Enclosure.

Riser Kit: No,thank you
Stone Tray: 760x760mm Quadrant
Brand: Aica
Type: Shower Tray Riser Kit
Custom Bundle: No
Material: Stone
Features: Refer to map,check your postcode for delivery time, Two delivery ways:next/three working days, Slimline Design
Height (mm): 30
Modified Item: No