Always use measuring box for measuring the quantity of sand and cement at the site.
													
																	Roof plastering ratio. 
								
	
		
	
																	Recommended plastering cement sand ratio are 1 3 for repair 1 4 for external wall ceiling roof concrete plastering 1 5 internal brick wall plastering have no fine sand 1 6 for internal brick wall plastering whick have fine sand general used in civil engineering building construction. 
																	Plastering work ratio calculation. 
																	Area width x height 10 x 10 100m 2. 
																	For a better understanding we are going to do this calculation for 100 sq m area. 
															
													
								
	
		
	
																	6 mm thickness of cement plaster and cement mortar 1 3 or 1 4 is recommended for cement plastering on rcc surfaces on the rcc walls fascia etc. 
																	4 1 part of cement and 4 part of sand. 
																	100 m 2 x 0 012m 1 2 m 3. 
																	Required volume of cement 1 4 x 1 55 void ratio x mortar volume 1 4 x 1 55 x 10 0 015 0 058 cum or 1 67 bags required sand volume 3 4 x 1 55 void ratio x mortar volume 3 4 x 1 55 x 10 0 015 0 174 m 3. 
															
													
								
	
		
	
																	Ratio of cement and sand for plastering the ratio of cement and sand for plastering is given below. 
																	The ratio of secondary coat of plastering cement sand 1 3 with the thickness of 8mm. 
																	The thickness of plaster is between 12 mm to 15 mm. 
																	Calculate the area of plastering. 
															
													
								
	
		
	
																	Plastering thickness 12 mm 12 1000 0 012m. 
																	To calculate the cement and sand for 100 m 2 plastering area in 1 6 ratio and 12 mm thickness. 
																	Always use good quality of cement different grades of cement as well as good quality sand. 
																	Or as directed by the engineer.