§1What this business is
The report describes pickling mild-steel sheet in sulphuric acid, dipping it in molten zinc at about 450–500 °C with a flux, optional colour coating, then running it through an 18-step roll-forming machine that presses in the corrugations and cuts sheets to length. Note: its machinery list has only the roll-forming machine and a decoiler, so the galvanising steps would need extra equipment or pre-galvanised coil.
Capacity: 30 sheets an hour, 9,000 sheets a year; 4,500 in year 1 at 50%.
§2Is it right for you?
Who it is for
A building-material trader who wants to make sheets for his own customers.
Who it is not for
Someone without a steel buying network or a ready customer base.
Advantages
- Steady demand from farm buildings, warehouses, sheds and homes
- Few workers needed
- One roll-forming line makes the main product
- Strong, long-lasting product that farmers trust
Drawbacks
- Very thin first-year profit (₹0.71 L) and low DSCR (1.75)
- Steel price swings hit margins directly
- Large steel mills and traders sell the same sheets
- Own galvanising means acid and zinc pollution control
Skills you need
- Roll-forming operation
- Steel buying
- Quality checks on gauge and coating
- Dealer and contractor sales
Why difficulty 3/5: Simple roll-forming, but thin margins and steel price risk.
§3Market
Who buys
- Farmers for farm houses, sheds and storage
- Warehouse and commercial builders
- Homes, garages and porches
How it sells
- Building-material and hardware dealers
- Contractors
- Direct sales to farmers
Good to know
- The report says corrugated sheets are mainly used in agricultural buildings because the folds add strength.
§4Raw material & machinery
| Item | Qty | Cost |
|---|---|---|
| 18-step corrugation single-layer sheet roll-forming machine | 1 | ₹12,50,000 |
| Decoiler, 5 tonne | 1 | ₹4,50,000 |
From: PMEGP sample project report — Galvanised Iron Roofing Sheets (prepared by Udyami/Samadhan)
- Mild steel sheets, 0.4–3 mm117 tonnes a year at ₹50,000 a tonne = ₹58.50 L at full capacity
- Zinc ingots₹2.50 L a year (lump sum)
- Sulphuric acid and metallic colours₹1.00 L a year (lump sum)
- Zinc ammonium chloride fluxkeeps molten zinc from oxidising
From: PMEGP sample project report — Galvanised Iron Roofing Sheets (prepared by Udyami/Samadhan)
In our raw material database
Galvanised and colour-coated steel sheet (GP/GC/PPGI) →Zinc ingot (refined zinc) →
§5Licences & registration
- Udyam registration
- GST registration
- Factory licence (depends on workers and power)
- State Pollution Control Board consent (CTE/CTO)
- BIS: galvanised steel sheet is under the Steel Quality Control Order — buy BIS-marked coil or get certified
- Trademark for your brand (optional)
§6Schemes & subsidies
- PMEGPCentralActive15–35% subsidy
- CGTMSECentralActiveNo collateral, up to ₹10 crore
- Stand-Up IndiaCentralClosed₹10 lakh – ₹1 crore loan
Built for PMEGP; at ₹23.40 L it is above the MUDRA limit, so CGTMSE or Stand-Up India suit the loan.
§7Money
How the investment is worked out: Plant & machinery ₹17.00 L + furniture ₹1.00 L + working capital ₹5.40 L = ₹23.40 L; 1,500 sq ft shed own or rented. Finance: own ₹2.34 L, term loan ₹16.20 L, working-capital loan ₹4.86 L.
Working capital: Working capital ₹5.40 L (bank ₹4.86 L); MS sheet 117 tonnes a year at ₹50,000 a tonne at full capacity.
Year not printed on the report — check current machinery prices.
§8Export potential
Confirm the HS code in the DGFT ITC(HS) lookup before you export
Export council / board: EEPC India
- HS codes are from the WCO HS 2022 list; confirm the 8-digit ITC(HS) line with DGFT or your customs broker.
- You need an Import Export Code (IEC) from DGFT before the first shipment.
§9Risks — where people fail
- Steel and zinc price rise
- Low margins in price wars
- Pollution compliance if galvanising in-house
- Seasonal construction demand
§1030 / 60 / 90-day plan
A general plan that applies to any business. A plan for this business will be added after research.
- Days 1–30: Visit a working gi corrugated roofing sheets unit, ask 10 buyers about price and quantity, and get quotations from 3 suppliers.
- Days 31–60: Udyam and the licences you need (Udyam registration, GST registration), a project report (DPR), and the scheme or loan file.
- Days 61–90: Space and machines, trial production, and first deliveries to 10 customers.
§11Who to connect with
Associations, clusters and training institutes — the directory is being built. Connect
§12Watch
There is no episode on this business yet. Shows are coming soon on the Podcast page.
Want to start GI Corrugated Roofing Sheets?
DPR, loan file or registration — ask us on WhatsApp.
¶Sources
Data review: 6 October 2026. Spotted a mistake? Report it. For information only — not legal or financial advice.