| S.No. | Field / Checkpoint | Reference | Status |
|---|---|---|---|
| A. INPUT QUANTITIES (per 1 m² 12mm plaster) | |||
| A1 | Mortar 1:4 — 0.014 m³ Acceptance: Per CPWD | Cement 4.4 kg + Sand 0.012 m³ | OK NC NA |
| A2 | Cement — 4.4 kg (0.088 bag) Acceptance: Per spec | Per analysis | OK NC NA |
| A3 | Sand (fine) — 0.012 m³ Acceptance: Per spec | Per IS 1542 | OK NC NA |
| A4 | Water — 5 L Acceptance: Drinkable | Per workability | OK NC NA |
| A5 | Labour — Mason 0.18 day + Mazdoor 0.45 day Acceptance: Productivity | Per CPWD | OK NC NA |
| A6 | Scaffolding hire (if > 2.5m) — 5% extra Acceptance: Per height | Per CPWD | OK NC NA |
| B. RATES + COSTS | |||
| B1 | Material + labour × rates = direct cost / m² Acceptance: Computed | Latest market | OK NC NA |
| B2 | OH + Profit + quoted rate Acceptance: Computed | Per company | OK NC NA |
Internal plaster (cement-sand 1:4) is the richer mix vs external 1:6 — providing smoother surface, better adhesion, and improved durability for indoor wall finishing. This rate analysis builds up the unit rate (per m²) for tender pricing, claim defense, and variation order rates.
Key difference from 1:6 external: more cement (higher cost) but better workability + finish, less sand wastage, faster productivity (smoother substrate), higher labour skill required.
Materials: - Cement: ~85 kg — at ₹400-450/bag of 50 kg = ₹680-770 - Sand: ~0.14 m³ — at ₹1,500-2,500/m³ = ₹210-350 - Water: ~20-25 L — negligible cost - Materials sub-total: ₹890-1,120
Labour (premium internal finishing): - Mason: 0.6-0.8 day @ ₹650-950/day = ₹390-760 - Helper: 0.6-0.8 day @ ₹450-650/day = ₹270-520 - Labour sub-total: ₹660-1,280
Other: scaffolding ₹50-150; curing ₹50-100; wastage (5%) ₹50-80; overhead (10-15%) ₹150-250; profit (10-15%) ₹150-250.
Total: ₹2,000-3,230 per 10 m² → ₹200-323 per m².
Note: 1:4 internal is approximately ₹50-80/m² LESS than 1:6 external because internal doesn't need scaffolding for ground floor + works are faster + less wastage. But cement cost is higher.
Internal plaster (1:4): - Use for visible interior walls of homes, offices, hotels, hospitals - Premium finish — accepts paint, wallpaper, decorative finishes - Thinner application (12-15 mm) — saves material + reduces dead load - Easier to repair / patch later - Better adhesion for tile / cladding fixed later
External plaster (1:6): - Use for exterior walls + courtyard walls - More water-resistant (denser mortar with less voids) - Thicker application (15-20 mm) — better weather resistance - Cheaper per m² (less cement) - Better for paint adhesion + weathering
Specialty mixes: 1:3 (very rich) for highly visible surfaces; 1:5 (medium) compromise mix; 1:8 (lean) for low-cost / non-visible areas / scratch coat; 1:1:6 lime-cement for traditional / heritage / breathable finishes.
Companion formats: - Rate Analysis Plaster External 1:6 (FMT-EST-005) — external plaster - Rate Analysis Brickwork (FMT-EST-003) — masonry - Labour Productivity Sheet (FMT-EST-007) — per-trade productivity - Rate Analysis Shuttering (FMT-EST-006) — formwork costs
Codes / specifications: - CPWD Specifications 2019 — Volume 1 Section 13 (Plastering) - IS 1542:1992 — Sand for plaster - IS 2250:1981 — Code of Practice for Preparation and Use of Masonry Mortars - IS 269:2015 — OPC 33 cement - IS 1200 Part 12:1976 — Method of measurement