what minimum care is required before preparation of flooring(Cemented/tiles)

• Base course/ base coat

The purpose of the base concrete is to provide a smooth level surface at ground level on which a floor finish can be laid. Base course is laid in two parts
i.e.

• 100 mm thick sand filling or stone filing. The sand should be clean and dry. Do not use silt or very fine sand mixed with rubbish. The use of sand is to keep out dampness and white ants. The sand should be free from clay, silt, sulphates, dirt and other harmful salts and organic impurities.
• 100 mm thick cement concrete 1;8;16 or cement concrete  1;6;12 or 1;4;8 as per requirement and strength of floor is laid. The thickness of   cement concrete may be raised from 100 mm to 150 mm for heavy duty floor. The use of various mixes in detail is given below.