
How much sand and cement is required for 1 sq ft plaster ...
1) Thickness of Plaster. 2) Mix Ratio (Cement:Sand) 1) thickness of cement plaster: recommended thickness of cement plaster is 6 mm (for ceiling and concrete plastering), 12 mm (for internal wall plastering and plane surface of brickwork) 15 mm or 20 mm (for external wall plastering and rough surface of brickwork) are used in building construction.