• Humidity of the concrete surface to a depth of 10-20 mm - 4%.
  
• Permissible variation of the floor surface from the plane when checking two-meter ruler - 4 mm.
  
• Surface slopes - according to the project, including canal grades. Deviation from the slopes in some areas, on the floor one meter, should not exceed 2.5%. Deviation from the vertical position should not be more than 2 mm per 1 meter of height.