Marmox Showertray installation

The Marmox Showertray with 'Marmoxite' or real stone finish ‘slicestone’ provides an attractive feature point to any wetroom. It is floor level sloping shower tray which sits at the same level as the surrounding floor* creating an open, step-free showering area.
The trays are supplied with a compact drain kit comprising of an attractive brushed stainless steel grate and gulley with a 50mm water seal (to ensure smells from the drain cannot escape.

[@FalaiLala]

Wow. Bardzo dobra praca! Jestem pod wrażeniem jak bardzo dbasz o wodoodporność! Pozdrowienia z Polski

[@mustafa.06]

Will the sponge base under the floor be crushed over time and there will be no level difference?