Cement: Sand = 1:5, 1 part of cement and 5 parts of sand in a mortar ). The overall thickness of plastering should be minimum 20mm including two coats. The Volume of each cement bag = 50Kgs/1440 = 0.0348 m 3.

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#### How many bags of cement do I need for plastering?

How to Calculate Plastering Quantity? – First upon calculating the total area where plaster has to be applied. Then calculate the wet volume of that area where plaster is to be applied. Wet volume of plaster = Area of Plaster x Plastering Thickness We have to calculate the dry volumes of the plaster.

The formula to calculate the Dry volume of the plaster are as follows. Dry volume of plaster = 1.33 x Wet volume of Plaster To calculate the quantity of cement. Cement = (Ratio of Cement Sum of Ratio of Cement and Sand) x Dry Volume of Plaster Here we will get the quantity of cement in m 3 and we can calculate the consumption of cement for plastering work by dividing the total cement quantity by the volume of one cement bag.

After that, we have to calculate the quantity of sand required for the plastering work. Sand quantity = (Ratio of Cement Sum of Ratio of Cement and Sand) X Dry Volume of Plaster Here we will get the quantity of sand required for the plastering work. Also, Read: What Is Gypsum Plaster | Advantage and Disadvantage of Gypsum Plaster

### How thick should plaster be on walls?

What thicknesses are plasters applied? Undercoat plasters are usually applied at 11mm and most finish coat plasters are applied at 2mm. Recommendations for the application thickness of Thistle plaster products can be found in our selector guides:,, The charts also include coverage, setting times, and other application information. : What thicknesses are plasters applied?

## How many bags of cement can plaster a 3 bedroom flat?

Cement: About 18bags of cement will be needed. The cost per bag is between ₦2,500 to ₦2,900. Labor cost: It takes ₦60 to ₦80 to lay one block. Therefore, to lay 4000 pieces of blocks will be 60 * 4000 = ₦240,000.

#### How long do you wait between skim coats?

Let the joint compound thoroughly dry before adding more. – I get it. It looks dry. It feels dry. It may even feel dry enough to sand. But unless you’re working with the chemical-hardening stuff (that has a much shorter curing window of 20, 45, or 90 minutes), you need to wait 24 hours before applying a second coat.

## How long do you leave second coat of plaster?

Step 5. Leave to dry – Leave the second coat to dry for approximately 25 to 30 minutes, depending on temperature.

#### How do you make the perfect plaster mix?

1 Measure out the water. – Cover your work area with a plastic mat or with newspapers. Find a mixing container (preferably a disposable one) that could accommodate the amount of mixture intended. The ideal ratio for a plaster of paris mixture is 2 parts plaster of Paris powder to 1 part water, Measure out the water and pour it into your mixing container.

## What is the ratio of PVA to water for plastering?

Priming a wall for plaster – Choose a reputable PVA, such as Timbond D4 Waterproof PVA Wood Adhesive. A mix of 1 part PVA to 4 parts water is recommended for this process. The PVA can be applied to the wall in the same way as paint, using a brush or roller.