Always use measuring box for measuring the quantity of sand and cement at the site.
Roof plastering ratio.
Plastering work ratio calculation.
100 m 2 x 0 012m 1 2 m 3.
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.
For roof plaster mainly ratio we use 1.
Always use good quality of cement different grades of cement as well as good quality sand.
Plastering thickness 12 mm 12 1000 0 012m.
4 1 part of cement and 4 part of sand.
For a better understanding we are going to do this calculation for 100 sq m area.
Ratio of cement and sand for plastering the ratio of cement and sand for plastering is given below.
Area width x height 10 x 10 100m 2.
The ratio of secondary coat of plastering cement sand 1 3 with the thickness of 8mm.
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.
Or as directed by the engineer.
We have detailed the calculation in our plastering work calculation post.
Calculate the area of plastering.
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.