PURPOSE: To install a new floor without destroying existing floor by boring recesses in a part of it, filling with mortar, and inserting a rod dangling consolidated below the new floor into the mortar followed by fixation.

CONSTITUTION: Recesses 3, 3 are bored in a part of existing floor 2 of a bathroom 1 without destroying it and filled with mortar 4, 4. New floors 5, 5 with rods 6, 6 dangling consolidated are placed on the existing floor 2, and the rods 6, 6 are inserted into the mortar 4, 4 in recesses 3, 3. The new floors 5, 5 will be fixed with hardening of the mortar 4, 4.