Rate analysis for plastering work - Estimating and Costing of Material and labour

Plaster is a mixture of building materials such as cement, sand and waterproofing admixtures (if need) which is used to coat walls and ceilings. Cement and sand are mixed with water using a mix ratio to form a plaster material 

Also read: What is the cost of plastering the walls? Plastering Material & Labour Cost

 

 

 

Types of Plastering:

·       Interior Plastering

·       Exterior Plastering

·       Ceiling Plastering

·       Water-proofing Plastering

 

The following points have to be considered while Plastering work Rate analysis

1.  Manpower wages + including their transportation

2.  Labour Output per day

3.  Material Required + wastage

4.  Power + Water Consumption

5.  Charges for Supervision

6.  Scaffoldings/Equipment and Tools

7.  Incidental expense

8.  Contractor profit

 

 

 

OK, Lets take rate analysis of plastering for data

Area = 10 sqm

Mix ratio = 1:6

Thickness = 15mm - 0.015m

  

Rate Analysis of Plastering

 

 

 

Step 1: Material calculation

 

Cement calculation

Volume of mortar = Area x thickness + (10% Extra for uneven surface)

Volume of mortar = (10 x 0.015) + 10% = 0.165cum

 

Dry Volume of Mortar = 1.22 x Wet Volume of Mortar

 

So,

Dry Volume of Mortar = 1.22 x 0.165 = 0.2013 cum

 

Given a mortar mix ratio of 1:6 therefore, one part of cement is mixed with six parts of sand

 

Volume of cement = 1/(1+6) = 0.142857 cum

 

Volume of cement = 0.2013 x 0.142857 = 0.0287 cum

 

Cement Required in weight = Volume x density = 0.0287 x 1440 = 41.328

 

Cement Required in weight = weight in kg/50kg = 41.328/50 = 0.82 – 1 bags

 

Sand calculation

Volume of sand = 6/(1+6) = 0.8571 cum

 

Volume of sand = 0.2013 x 0.8571= 0.1725 cum

 

Sand Required in weight = Volume x density = 0.1725 x 1650 = 284.62kg

 

Sand Required in Cft = 0.1725 x 35.31 = 6.0909 cft (As we know that 1m3 = 35.31 CFT)

 

Also use plastering material calculation excel sheet

 

 

 

Step 2: Labour calculation

 

How much plastering can be done in a day?

Wall Area	Wall height (noted for Scaffolding preparations)	Window, door jambs and beam soffit	Labour Required
100 sqft	<10ft	nil	1 mason, 1 helper
100 sqft	<10ft	Yes	1.25 mason, 1.25 helper
100 sqft	10ft	Yes	1 mason, 1 helper
100 sqft	10ft – 12ft	nil	1.5 mason, 1.5 helper
100 sqft	10ft – 12ft	Yes	1.5 mason, 1.5 helper

 

The above data his prepared for average labour used at more than 10 construction sites. Try to prepare your own labour usage

Also read: Labour management in construction

Also read: Task for an average skilled labour per day

 

From the above table, (10sqm – 107.6sqft)

We will take a 10 ft wall with no walls and door jambs so we need 1 mason and 1 helper.

 

 

 

Step 3: Other Expenses

1.  Power + Water Consumption – 1.5%

2.  Charges for Supervision – 5%

3.  Scaffoldings/Equipment and Tools – 2%

4.  Incidental expense – 2%

5.  Contractor profit – 20%

Above percentage, his prepared for average labour used more than 10 construction sites. 

Have a look at What is the cost of Cement Plastering per sqft, sqm, cft and cum?

 

Rate Analysis of Plaster Using Excel Sheet

Wall Plastering Rate Analysis
Area = 10 sqm Mix ratio = 1:6 Thickness = 15mm - 0.015m
SNo.	Description	Qty	Unit	Rate	Cost
Materials
1	Cement	1	bags	400	400
2	Sand	6.09	cft	60	365.4
Labours
3	Mason	1	nos	1000	1000
4	Helper	1	nos	850	850
Materials + Labout Cost					2615.4
Other Expenses
5	Power + Water Consumption	1.50%			39.231
6	Charges for Supervision	5%			130.77
7	Scaffoldings/Equipment and Tools	2%			52.308
8	Incidental expense	2%			52.308
9	Contractor profit	20%			523.08
Cost of 10.00 Sq.m.					3413.097
Cost of 1.00 Sq.m.					341.3097
Cost of 100.00 Sq.m.					34130.97

 

Also Use: Plastering Calculator | Calculation of Materials For Plastering | SQFT | SQM

FAQ

What are the Specifications Used for Plastering Work in different countries?

Here are the lists of plastering work specifications as per the Indian standards, British, American, and New Zealand Standards

Indian Standard (BIS codes):

IS 8112 Specification for 43 grade OPC

IS 269 Specification for 33 grade OPC

IS 1489 Specification for Portland Pozzolana Cement

IS 383 Specification for coarse and fine aggregates for natural sources for concrete.

IS 1542 Specifications for sand for plaster

IS 2645 Specifications for integral cement waterproofing compound

 

British Standards:

BS EN 998-1:2016

This standard BS EN 998-1:2016 Specification for mortar for masonry is classified in these ICS categories: 91.100.10 Cement. Gypsum. Lime. Mortar

 

American Standards:

ASTM C 926 - Standard Specification for Application of Portland Cement-Based Plaster

 

New Zealand Standards:

NZS 4251.1:2007 - Solid plastering - Cement plasters for walls, ceilings and soffits

 

The material used for plastering work should be tested as per specification.

What are the points to be considered while Plastering work Rate analysis?

1.  Manpower wages + including their transportation

2.  Labour Output per day

3.  Material Required + wastage

4.  Power + Water Consumption

5.  Charges for Supervision

6.  Scaffoldings/Equipment and Tools

7.  Incidental expense

8.  Contractor profit 

What are the sequences of work to be done before starting the plastering work?

Before starting interior plastering work, interior brickwork should be completed. In external plastering work, you should first complete the perimeter brickwork of each floor. Exterior plastering work is always started from the top of the building and finished at the bottom, and ceiling plastering should be completed before wall plastering begins.