The Complete Guide to Cement Plastering | ConstructionKart


A mortar made from gypsum plaster with certain impurities present or added during the calcining process, sand or wood fibre, and water for plastering interior surfaces.  

Know how to find the cement plastering ratio and calculating the cement and sand quantities needed for plastering. Here is the complete guide

The house’s interior and exterior walls are both plastered with cement plaster. To do a good job, you’ll need the best cement plastering available. Water, fine aggregates, and Portland cement are mixed to make cement plaster. To make cement plaster, different amounts of cement and sand are combined. There are three different types of cement grades to pick from. In the market, there is Ordinary Portland Cement (OPC), Portland Slag Cement (PSC), and Portland Pozzolana Cement (PPC). There are two grades of OPC: 43 and 53. Plastering work is best done with both grades.

This is the crucial distinction. Exteriors are normally coated with cement render, while interiors are usually completed with plaster. The coat of plaster is particularly smooth when applied to a level surface, making it ideal for interior surfaces. For added strength, cement rendering uses a significantly higher proportion of sand.

How to find the Cement Plastering Ratio?

Plastering is the process of covering a wall or ceiling with a layer of plaster (Cement plaster). Plastering is used to smooth out surface irregularities generated by brickwork and prepare the surface for painting. There are a variety of plastering materials available, but cement plaster is the most common.

Calculating the Cement and Sand quantities needed for plastering:

Points to keep in mind while calculating plastering job:

● The plastering ratios are volumetric cement and sand ratios (for example, Cement: Sand = 1:5, which is 1 component cement and 5 parts sand in a mortar)

● Plastering should be at least 20mm thick overall, with two coatings

The dry density volume of cement is 1440 kilograms per cubic meter

Each cement bag weighs 50 kilograms (110 pounds)

Each cement bag weighs 50 kilograms (1440 kg) and has a volume of 0.0348 cubic meters

Sand’s dry density is 1600 kilograms per cubic meter

● The plastering is done in two layers (two coats): the first coat is termed a Rough coat or Primary coat, and it is applied with a thickness of at least 12mm (typically between 12-15mm)


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