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

Contents

- 1 How do you calculate cement bags for plaster?
- 2 How many square meters can a bag of cement plaster?
- 3 How many bags of cement do I need for 100 square feet of plaster?
- 4 How many bags of cement do I need to plaster a room?
- 5 Why do you need 2 coats of plaster?
- 5.1 What is ratio of cement and sand for plaster of wall?
- 5.2 How many coats of plaster do you need?
- 5.3 one square meter plastering for cement sand calculation
- 5.4 How many bags of cement do I need to plaster a room?
- 5.5 How many m2 does a 25kg bag of plaster cover?
- 5.6 How do I calculate how much plaster I need?

## How do you calculate cement bags for plaster?

Required Volume of Cement = 1/4 x 1.55 (Bulkage & Wastage) x Mortar Volume.

## How many square meters can a bag of cement plaster?

1 bag of cement covers how much area of plaster –

- 1 bag cement plaster coverage area is calculated by consumption of cement and sand quantity in plaster, that is very good questions 1 bag of cement covers how much area of plaster.
- 1) 1 bag cement external wall plaster coverage area ( 1:6 mix ratio & 20 mm thick plastering)
- Given no of cement bags = 1 bag
- 1 bag cement weight = 50 kg
- Density of cement = 1440 kg/m3

- Dry Volume of cement = weight/density
- Dry volume of cement = 50/1440 = 0.0347
- Dry volume of cement = 0.0347 m3
- If cement sand ratio is 1:6, than

Dry volume of sand = 0.0347 ×6 = 0.208 m3 Total volume of mortar = 0.2427 m3 For converting dry volume of mortar to wet volume we will divide by 1.33 to dry volume of mortar Wet volume = 0.2427/1.33 = 0.1825 m3 Thickness of plaster = 20 mm = 0.020 m Coverage area of plaster = 0.1825/0.02 = 9.125 m2 ● Ans.

- Given no of cement bags = 1 bag
- 1 bag cement weight = 50 kg
- Density of cement = 1440 kg/m3

- Dry Volume of cement = weight/density
- Dry volume of cement = 50/1440 = 0.0347
- Dry volume of cement = 0.0347 m3
- If cement sand ratio is 1:4, than

Dry volume of sand = 0.0347 ×4 = 0.1388 m3 Total volume of mortar = 0.1735 m3 For converting dry volume of mortar to wet volume we will divide by 1.33 to dry volume of mortar Wet volume = 0.1735/1.33 = 0.131 m3 Thickness of plaster = 12 mm = 0.012 m Coverage area of plaster = 0.131/0.012 = 10.92 m2 ● Ans.

### How many bags of cement is 20 square meters?

no of cement bags required per square metre for plastering – 1) plastering thickness 12mm & cement sand ratio 1:4 :- For a Sample calculation, I will assume a 12mm (0.012m) thick plaster and a mix ratio of 1:4 for plastering of 1 square metre brick wall ● Step-1: we know given area of brick wall = 1 sq m ● Step-2: Volume of brick wall plaster = Area X Thickness = 1 X 0.012 = 0.012 m3 Since wet volume is always less than the dry volume.

For converting wet volume to dry volume of mortar we will multiply 1.33 into wet volume. The dry volume of mortar required for brick wall plastering = 1.33 X Dry volume of plaster = 1.33 X 0.012 = 0.01596 m3. ● Step-3: The mix ratio of mortar is 1:4, So total ratio = 1+4 = 5 in which one part is cement and 4 part is sand Cement required = 1/5 X 0.01596 = 0.003192 cu m ( cubic meter) Sand required = 4/5 X 0.01596 = 0.01277 cu m ● Step-4: To get the weights of materials required in multiply it with its density and convert cubic feet into cubic meter Cement required = 0.003192 cum X 1440 kg/cum = 4.6 Kgs Since Sand density is 1620 kg/m3 Then quantity of sand = 0.01277 ×1620 = 21Kgs.

● Ans :- 21 Kgs (0.01277 cu m) sand and 0.092 bags (4.6 Kgs) cement required per square metre for plastering in 12mm thick plaster & ratio 1:4.2) Quantity of sand and cement bags per square metre for plastering in 20mm thick plaster & mix ratio 1:4 cement required for 1 sq m plastering of brick wall :- For a Sample calculation, I will assume a 20mm (0.020) thick plaster and a mix ratio of 1:4 for plastering of 1 sq m brick wall ● Step-1: we know given area of brick wall = 1 sq m ● Step-2: Volume of brick wall plaster = Area X Thickness = 1 X 0.020 = 0.020 cu m Since wet volume is always less than the dry volume.

For converting wet volume to dry volume of mortar we will multiply 1.33 into wet volume. The dry volume of mortar required for brick wall plastering = 1.33 X Dry volume of plaster = 1.33 X 0.020 = 0.0266 cu m. ● Step-3: The mix ratio of mortar is 1:4, So total ratio = 1+4 = 5 in which one part is cement and 4 part is sand Cement required = 1/5 X 0.0266 = 0.00532 cu m ( cubic meter) Sand required = 4/5 X 0.0266 = 0.02128 cu m ● Step-4: To get the weights of materials required in multiply it with its density and convert cubic feet into cubic meter Cement required = 0.00532 cum X 1440 kg/cum = 7.7 Kgs Since Sand density = 1620 kg/m3 Then quantity of sand = 0.02128 × 1620 = 34.5 Kgs.

● Ans :- 34.5 Kgs (0.02128 m3) sand and 0.154 bags (7.7 Kgs) cement required per square metre for plastering in 20mm thick plaster 1:4. ALSO READ :- Plaster sand near me, delivery, colour and 25kg or bulk bag Cement to sand ratio for mortar, brickwork and plastering How to calculate plastering quantity | cement sand ratio How to calculate the quantity of material for plaster Plaster cost per square foot with material in India Sand required for 1 sqm plastering:- sand requirement depend on thickness of plastering, around 21kgs to 34kgs sand required for 1 sqm plastering.

- Now question is how many cement bags per square metre for plastering? ● Ans.
- 0.092 bags cement are required per square metre for plastering in case of 12 mm thick plaster & cement sand ratio 1:4 ● Ans.0.154 bags cement required per square metre for plastering in case of 20 thick plaster & cement sand ratio 1:4.

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## How many bags of cement do I need for 100 square feet of plaster?

There are several things upon which the requirement of cement bags differ like structure, thickness, ratio of materials that are to be used in the construction, type of cement. But without knowing how many cement bags required for 1500 sq ft house, you won’t be able to place your order.

- Thumb rule for cement in rcc concrete is 0.301 cement bags/sq ft
- Thumb Rule for cement bags in surface ground is 0.089 cement bags/sq ft
- Thumb Rule for cement bags in external wall brickwork is 1.26 cement bags/m3 of brickwork of 9 inch
- Thumb Rule for cement bags in internal wall brickwork is 1.28 cement bags/m3 of brickwork of 4.5 inch
- Thumb Rule for cement bags for external plastering is 0.170 cement bags/ sq ft plastering
- Thumb Rule for cement bags for internal plastering is 0.008 cement bags/ sq ft plastering
- Thumb Rule for cement bags for ceiling plastering is 0.005 cement bags/ sq ft plastering

Now if you are planning to use cement bags for 1500 sq feet house then to know how many bags you need to buy, follow this calculation:

Cement required by the external brick wall: External brick wall length =2(50+30) = 160 ft

Height of brick wall 10 feet Height of brick wall above roof slab = 3feet Depth of brick wall = 2 feet Total Height= 15feet Area of external brick wall= 160* 15= 2400 sq ft Volume = 2400 sq ft* 9 inch = 1800 cu ft Volume = 1800/ 35.3147 = 51m3 Volume of brickwork = 51m3 Now let’s observe the above mentioned rule for wall brickwork: Thumb Rule for cement bags in external wall brickwork is 1.26 cement bags/m3 of brickwork of 9 inch(cement:sand=1:6) No of cement bags= 51*1.26= 64bags

Cement required by internal brick wall

Brick wall length = 50+30+30+30 =140 ft Height of Brick wall =10 feet Depth of brick wall = 2 feet Total height = 12 feet Area of external brick wall = 140* 12= 1680 sq ft Volume = 1680 sq ft * 4.5 inch= 630 cu ft Volume = 630/35.3147 =17.84m3 Volume of brick work = 17.84 Thumb Rule for cement bags in internal wall brickwork is 1.28 cement bags/m3 of brickwork of 4.5 inch(cemet: sand= 1:4) No of cement bags = 17.84* 1.28= 23 So the total number of bags becomes 64+23= 87 This is the approx amount of cement bags you will be needing.

### How do I calculate plaster quantity?

Calculating the quantities of Cement & Sand required for plastering: – General points to be remembered in Plastering work calculation

- The ratios mentioned in plastering are volumetric ratios of Cement & Sand (Ex. 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.
- Cement has a dry density volume of 1440Kg/m 3
- Each bag of cement weighs = 50 Kgs or 110 lbs
- The Volume of each cement bag = 50Kgs/1440 = 0.0348 m 3,
- The dry density of sand = 1600Kgs/m 3
- The plastering is done in two layers (two coats): The first coat of plastering is laid with the thickness of minimum 12mm (usually ranges between 12-15mm) and this coat is called as a Rough coat or Primary coat,
- The second coat should be laid with the thickness of 8mm and this is called as a Finish coat or Secondary coat of plastering.

Total Plastering = First coat + Second Coat

### Which cement is best for plastering?

Which cement is best for plastering? OPC 43 is the best cement for plastering both exterior and interior walls of low residential buildings and OPC 53 is best for plastering high rise buildings. OPC is available in 3 grades in the market, OPC 33, OPC 43, and OPC 53.

#### How many bags of cement are in a meter?

How many bags of concrete do you need for a 4×4 slab? – For a 4×4 slab, we can repeat the calculation above with the new measurements: 4 x 4 x 0.1 (assuming a depth of 10cm) = 1.6m3 One cubic metre requires approximately 110 x 20kg Concrete Mix bags. Therefore, you will need 176 bags of concrete (1.6 x 110).

## How many bags of cement do I need to plaster a room?

Plaster: Two bags of cement and six wheelbarrows of sand will cover 20 m2 at 15 mm thickness.

## Why do you need 2 coats of plaster?

CGN Screwfix Select – First coat roughs it out, and also helps give more even suction. Thinner 2nd coat to get the imperfections on the first. This is a tried and tested method. If you’re learning plastering, then stick with 2 coats and perfect the method.it works.

One coat and spongeing is fine in certain situations, but your timing has to be spot on. Get the wrong timing and all you’ll do is pull all the grit in the plaster to the surface. As I found via a 1 coat plasterer – to my cost. Walls were not flat and a bit wavy. Net result plaster in places way to thin so fractured and lifted as soon as a mist coat went one.

There seems to be a lot about who just put the minimum on and one coat. John – I have always ever done 1 coat. After that my shoulder goes & I’m knackered. But I’m only DIY, then wallpaper or lining paper, does a good job. Never ever had any plaster lift or crack.

### What is ratio of cement and sand for plaster of wall?

How to Calculate Cement And Sand Required for Cement Plastering – To arrive at the quantities of Cement, Sand and Water required for Plastering work, we need to understand on what parameters do these quantities depend.

Volume of Plaster required: Volume of Plaster can be determined by multiplying the area of plastering to be done and thickness of plaster (12 mm in this case)Mix Ratio of Plaster: Mix ratio mean the ratio of Volume of Cement to the Sand used in the mixture. Plaster of mix ratio 1:4 mean that it contains one part of cement and 4 parts of sand by volume. Since the amount of cement and sand changes with the change in the mix ratio, it is one of the most important factors in determining the quantities.

### How many coats of plaster do you need?

How to skim plaster a wall Are your walls in need of some TLC? Cracks and uneven surfaces are difficult to cover up with a lick of paint. Use our step-by-step guide to help skim plaster your walls. Skim plastering is the ultimate makeover for your walls – allowing you to wave goodbye to lumps and bumps and say hello to smooth, even surfaces, primed for decorating.

- But don’t dive in just yet.
- Skimming your walls is a full-on job, and you’ll need to make sure you’re prepared with your equipment, and happy with what you’re doing before getting started.
- Use our easy-to-follow, step-by-step guide to help take the stress out of skimming, so you can achieve dream walls that are smooth, even and crack-free.

Fixing up your walls will get dusty. Save your floors and furniture from dirt and splatter by removing anything you can from the space and covering anything you can’t with plastic sheeting. Cover the floor with protective sheeting and remove cover plates from your light switches and plug sockets to keep them free from splatters.

- It’s also a good idea to cover doorways to save plaster dust from escaping into other rooms.
- Before you start skimming, you’ll need to make sure your walls are clean from dust and that any cracks have been sealed.
- This will help you achieve a smooth finish with as few coats as possible.
- Start by scraping off any loose plaster, then fill the cracks using the pre-mix joint compound and either your taping knife or a smaller drywall knife.

Pull any nails from the surface and fill in those holes in the same way. Once your walls are repaired, you can dust and clean them down to remove any grime that might affect your plaster sticking. Make sure that all your walls are completely dry before moving onto the next step.

- If you’re using a quick-set joint compound you will need to mix it with water before use.
- Mix your joint compound according to the instructions and remember to take note of the time limit printed on the packaging – this indicates how long you can use your mixed paste before it goes hard.
- Mix the compound in your large bucket, using your drill with mixing attachment to make the process quicker (and easier on your arms).

The compound should form a mud-type consistency. Remember not to make too much compound at a time as the mixture won’t wet again once it has stiffened. It can be useful at this point to pull in a helping hand, where available. While you set about plastering, your helper could start mixing your next batch of compound.

Now you’re ready to apply your first skim coat. Transfer your mixed compound to your skimmer plate – you want to be holding your skimmer plate in one hand and applying with the other. Pile just a small amount of plaster onto your trowel, you can always add more later. Starting in one corner of the wall, drag your trowel vertically over the wall, applying a firm, even pressure.

Continue to apply out from the first spot you have covered so that each new scoop slightly overlaps the last. This will help make sure you don’t leave gaps and create an even finish. Lay the plaster as quickly as you can and try not to worry about leaving trowel marks – you can smooth these over on the second coat.

- This is where you can focus on smoothing over trowel marks, making for a completely even surface.
- If you can still see obvious grooves and indents after the second coat dries, trowel on a third coat and drag it vertically, so each layer is at a right angle to the one before.
- Try using a squeegee-like taping knife to taper the edges without leaving obvious trowel lines.

- Wait until your walls are completely dry before picking up your sandpaper, this will probably take 24 hours.
- Once the surfaces are completely stiff, smooth away any rough edges, bumps or grooves using fine-grit sandpaper (180-220 grit).
- If you have some higher areas, you can sand these using slightly coarser paper (100-120 grit), blending them into the lower areas for a completely flat surface.

Once you’re done, you’ll want to give the room a proper clean-up to remove any excess plaster dust. Reach the hoover right up in the corners and along the walls themselves. Leaving excess dust will make the surface less adhesive to wallpaper paste or paint, so be sure not to miss any.

And there you have it. Smooth and dust-free walls, ready to be decorated. Now you’ve got your walls looking good, gain peace of mind by making sure your home is insured. Insure your home with John Lewis Home Insurance by calling us on or online. John Lewis Finance, John Lewis Home Insurance and John Lewis & Partners are all trading names of John Lewis plc.

### one square meter plastering for cement sand calculation

Registered office: 171 Victoria Street, London SW1E 5NN. Registered in England and Wales (Registered Company Number 233462). John Lewis plc is an appointed representative of Munich Re Digital Partners Limited, a company authorised and regulated by the Financial Conduct Authority to carry on insurance distribution activities.

- John Lewis Finance, John Lewis Insurance and John Lewis & Partners are all trading names of John Lewis plc.
- Registered office: 171 Victoria Street, London SW1E 5NN.
- Registered in England and Wales (Registered Company Number 233462).
- John Lewis plc is an appointed representative (Financial Conduct Authority no.416011) of Covea Insurance plc which is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority (registration no.202277).

John Lewis Specialist Home Insurance is underwritten by Covea Insurance plc. Registered Office: Norman Place, Reading, Berkshire RG1 8DA. Registered in England and Wales (registration no.613259).,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, : How to skim plaster a wall

### How many bags of cement do I need to plaster a room?

Plaster: Two bags of cement and six wheelbarrows of sand will cover 20 m2 at 15 mm thickness.

### How many m2 does a 25kg bag of plaster cover?

For Dry-Dash Aggregates – As a rule of thumb use one of our 25kg bags per 2m2 of wall area. : Coverage Calculator | Stonepack Aggregates & Renders

### How do I calculate how much plaster I need?

What Is Plaster Calculation? Area of Plastering = Length × Width. Amount of Cement = ÷ Volume of Cement. Amount of Sand = × Density of Sand.