These pedestals are used to adjust the height of a surface for the installation of tiles in outdoor areas, allowing you to raise the surface above the ground by up to 45mm. You can use this to run cables or pipes underneath the tiles or raise the entire installation above the ground.
Typical installations using these pedastals might be on terraces or balconies, in installations with these, grouting is not required.
For added protection use this shim on top of the pedestal to protect the porcelain.