Skip to main content

Rate analysis: 20 mm plaster 1:4 per 100 m²

Short answer

For 100 m² of 20 mm wall plaster (1:4), dry mortar 2.54 m³ provides 14.63 bags cement and 2.032 m³ sand. Including labour and 15% overhead + 10% profit, rate = NPR 64,677.50 per 100 m² (646.78/m²).

Prepare rate analysis for 20 mm thick cement sand plaster (1:4) in wall per 100 m².

Rates and labour norms below are illustrative (DUDBC-style norms; use the current District Rate and norms of the project area for a real estimate): cement NPR 1,000/bag, sand NPR 3,500/m³, 20 mm aggregate NPR 4,500/m³, skilled labour NPR 1,500/day, unskilled labour NPR 1,100/day, water lump sum, contractor's overhead 15% and profit 10% on direct cost (VAT excluded).

Quantities per 100 m²

  • Wet mortar =100×0.02=2.00= 100 \times 0.02 = 2.00 m³; dry =1.27×2.00=2.540= 1.27 \times 2.00 = 2.540 m³
  • Cement =1/5×2.540=0.5080= 1/5 \times 2.540 = 0.5080 m³ =14.63= 14.63 bags; sand =4/5×2.540=2.032= 4/5 \times 2.540 = 2.032 m³
  • Labour (assumed norm for a 20 mm two-coat plaster): mason 10 days, labourer 12 days per 100 m².

Analysis

ItemQtyUnitRate (NPR)Amount (NPR)
Cement14.63bag1,000.0014,630.00
Sand2.032m³3,500.007,112.00
Skilled labour (mason)10.0day1,500.0015,000.00
Unskilled labour12.0day1,100.0013,200.00
Scaffolding, water and curing (lump)1LS1,800.001,800.00
Direct cost51,742.00
Contractor's overhead @ 15%7,761.30
Contractor's profit @ 10%5,174.20
Total (rate per 100 m²)64,677.50

Rate = NPR 64,677.50 per 100 m² (NPR 646.78 per m²).

✓ Answer checked by Claude Opus 5.5 (high effort)

Related questions

All Estimating and Costing chapter 4 questions →