As the ground floor directly rests on the ground, there is no need for a sub-floor. In order to drain the water outside completely, adequate drainage arrangements have to be made beneath the floor.
In normal practice, the space above the ground, up to a height of about 25–30 cm below the plinth level, called the basement, is filled with some inert materials like sand, gravel, crushed stone, cinder, etc. Over this course, a damp-proof course if needed is laid. Otherwise the floor covering is laid directly on the uniform bed.
The materials used for ground floor construction are: bricks, stones, concrete, hollow concrete blocks or wooden blocks.
The materials generally used for floor coverings are bricks, concrete, terrazo tiles, marbles, stones, mosaic, wood, etc.
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