Install Floor Tiles and Grout

What happens here

Lay ceramic tiles on the sauna floor directly over the previously installed waterproofing membrane. Apply thin-set mortar to the floor using a notched trowel, then press the tiles firmly into place. Use tile spacers to ensure consistent spacing between tiles. Once the tiles are set and the mortar has cured, mix and apply grout to fill the gaps between the tiles. Use a rubber float to spread the grout and ensure it is pressed into all joints. Clean excess grout from the tile surfaces with a damp sponge.