Calculate exact weight per sheet, per bundle and per MT for corrugated, trapezoidal and standing seam PPGI and PPGL roofing profiles. Includes profile allowance, IS 14246 / JIS G3312 / ASTM A755 specs and complete buyer's checklist.
Enter sheet dimensions, profile type, base metal thickness and coating to get instant weight per sheet, per bundle and total tonnage. Profile allowance is automatically applied.
Weight per m² (flat area) for PPGI and PPGL sheets at each standard base metal thickness and coating class — India market standard profiles
Click any row to highlight | PPGI base density 7.85 g/cm³ + zinc coat ~0.09 kg/m² for Z60, ~0.41 kg/m² for Z275
Dimensions, effective cover widths, profile allowance factors and typical use for Indian market PPGI/PPGL roofing profiles
| Pitch | 76.2 mm |
| Depth | 17–19 mm |
| Flat coil width | 1000 mm typical |
| Effective cover | 940–1000 mm |
| Profile allowance | +8–12% (use 1.10×) |
| Side lap | 1 corrugation each side |
| Typical BMT | 0.40–0.55 mm |
| Length range | 1800–6000 mm |
| Typical use | Residential, sheds, agri |
| Rib pitch | 125 mm |
| Rib height | 10 mm |
| Flat coil width | 1060 mm |
| Effective cover | 875 mm |
| Profile allowance | +18–20% (use 1.19×) |
| Side lap | Interlocking rib |
| Typical BMT | 0.47–0.60 mm |
| Length range | 2400–12000 mm |
| Typical use | Commercial, industrial |
| Rib pitch | 210 mm |
| Rib height | 25 mm |
| Flat coil width | 1150 mm |
| Effective cover | 840 mm |
| Profile allowance | +26–30% (use 1.28×) |
| Side lap | Overlap 1 rib |
| Typical BMT | 0.50–0.80 mm |
| Length range | 3000–12000 mm |
| Typical use | Long-span industrial |
| Pitch | 160–200 mm |
| Depth | 20–30 mm |
| Flat coil width | 1219 mm |
| Effective cover | 1000–1000 mm |
| Profile allowance | +15–22% (use 1.18×) |
| Side lap | Interlocking edge |
| Typical BMT | 0.40–0.55 mm |
| Length range | 1800–3600 mm |
| Typical use | Villas, bungalows, schools |
| Seam pitch | 333–500 mm |
| Seam height | 38–65 mm |
| Flat coil width | 530–600 mm per panel |
| Effective cover | 400–500 mm per panel |
| Profile allowance | +15–20% (use 1.17×) |
| Clip fixing | Hidden — no penetrations |
| Typical BMT | 0.55–0.70 mm |
| Length range | Up to 30 m+ continuous |
| Typical use | Premium commercial, airports |
| Profile | None |
| Sheet width | 914 / 1000 / 1219 / 1250 mm |
| Effective cover | Same as sheet width |
| Profile allowance | 0% — none |
| Typical BMT | 0.35–1.20 mm |
| Length range | 1000–6000 mm |
| Use | Cladding, flashing, wall panels, fabrication |
Profile Allowance is critical for accurate ordering: The effective cover width is always less than the flat coil width used to make the sheet. A corrugated sheet with a 1000mm flat width covers only 940mm of roof. If you calculate material using flat width instead of effective cover width, you will be 6–10% short on area coverage. Always order sheets based on effective cover width, not coil/flat width.
Key differences between Prepainted Galvanised (PPGI) and Prepainted Galvalume / Aluzinc (PPGL) roofing sheets for Indian conditions
Recommendation for India: For industrial and commercial roofing beyond 20 years lifespan, specify PPGL AZ100 or AZ150 — the aluminium-zinc alloy coating gives significantly better corrosion life per rupee. For residential economy roofing (10–15 year expectation), PPGI Z180 is the most cost-effective choice widely available across Indian distributors. Within 5 km of the sea — always upgrade to PPGL AZ150 minimum.
IS 14246, JIS G3312 and EN 10169 standard paint system requirements for prepainted roofing sheets — top coat, primer, back coat and total DFT
India Market Reality: Most PPGI sold through building material dealers in India is standard polyester (PE) 20–25 µm DFT. When buying from distributors rather than direct from mills (JSW, TATA, NIPPON), always request the mill test certificate (MTC) which confirms actual DFT, coating weight, and zinc/aluzinc class. Substandard sheets with thinner paint (12–15 µm) and lighter zinc coating (Z60 or less) are common in the grey market — these fail within 3–5 years in Indian conditions.
Tick off each point before placing your order. Click each checkbox to mark it complete — your progress is shown below.
Ask for BMT (Base Metal Thickness) — not TCT (Total Coated Thickness). The zinc/paint coat adds 0.05–0.15mm on top of BMT. A sheet sold as "0.50mm" may have only 0.40mm base metal if TCT is quoted.
Min. BMT per use: Residential 0.40mm | Commercial 0.47mm | Industrial 0.55mm+Verify the zinc coating class on the Mill Test Certificate. Z180 (180 g/m² both sides total) is the recommended minimum for Indian residential use. Z275 for coastal and industrial.
Inland: Z180 min | Coastal (>5km): Z275 | <5km coast: PPGL AZ150PPGL (Galvalume / Aluzinc) has 2–4× better corrosion resistance than PPGI in flat areas. Mandatory for coastal locations. PPGI is more forgiving at cut edges due to sacrificial zinc.
Coastal India: PPGL AZ100 min | Marine: PPGL AZ150 | Inland budget: PPGI Z180Every legitimate coil from JSW, TATA, NIPPON, BHUSHAN will have an MTC showing heat/coil number, BMT, zinc coating weight, yield strength, and paint DFT. Never accept a batch without MTC.
Check: Coil No. | BMT | Zinc g/m² | YS (MPa) | Paint DFT (µm)Roofing sheets should be minimum G300 (300 MPa yield) or G350 for spans above 1.5m. G550 is available for thinner long-span profiles. Verify on MTC — not salesperson's claim.
Standard spans: G300 | Long span >1.5m: G350–G550 | CGCC / TDC51D+Z gradeStandard polyester (PE) 20–25 µm is fine for ≤10 year expectation. For 15–25 year life, specify SMP or HDP. For 25+ years or coastal — specify PVDF. Ask for the resin type in writing.
Economy: PE 20µm | Commercial: SMP 25µm | Premium: PVDF 25–30µmSubstandard PPGI in India is often 12–15 µm instead of the specified 20–25 µm. DFT can be verified with an inexpensive magnetic DFT gauge on delivery. Reject if below spec.
IS 14246 minimum: 15 µm top coat | Specify: 20–25 µm minimumThe underside (back coat) protects against condensation corrosion inside the building. Minimum 7 µm polyester back coat. Buildings with aggressive interiors (fertiliser plants, food processing) need 12–15 µm back coat or epoxy.
Standard: 7–9 µm PE back coat | Aggressive interior: 12–15 µm epoxy back coatIndian PPGI is commonly sold in RAL 3009 (oxide red), RAL 6005 (green), RAL 5013 (dark blue), RAL 9002 (grey-white). Colour fading varies by pigment — ask for chalking rating (should be ≤ Rating 2 after 5 years per ISO 4628-6).
Specify RAL code in PO | Darker colours fade faster in Indian UV conditionsCorrugated 1000mm flat sheet covers only ~940mm of roof. If you calculate area using flat width, you will be 6% short. Always use effective cover width for area calculations and quantity ordering.
Corrugated 1000mm flat → 940mm cover | Trapezoidal: see profile cardStandard mill tolerance on cut length is ±25mm. For buildings requiring close fit (e.g., below fascia level) specify ±10mm and confirm the supplier can achieve this on their guillotine/flying shear.
Standard: ±25mm | Tight fit: specify ±10mm in POSheet span capacity depends on BMT, profile depth, and steel grade. A 0.47mm corrugated sheet is rated for max 1200mm purlin spacing. At 1800mm spacing, you need 0.55–0.60mm or a deeper trapezoidal profile.
0.40–0.45mm corrugated: max 1000mm purlin | 0.55mm trap: up to 1800mmHip and valley cuts, openings for skylights, vents and AC units all waste material. Add 5% wastage for simple shed roofs, 8–12% for complex residential roofs with multiple hips, ridges and penetrations.
Simple shed: +5% | Residential gable: +7% | Complex hip roof: +10–12%End lap (head lap) should be minimum 150mm for slopes above 15°, and 200mm for slopes 5–15°. Side lap should be minimum 1 full corrugation for corrugated sheets. Confirm with structural engineer for your roof pitch.
End lap: 150mm (slope >15°) | 200mm (slope 5–15°) | Side: 1 rib minIS 14246:2005 is the Indian standard for prepainted metal coated steel sheets. BIS certification (IS mark) on PPGI/PPGL is not yet mandatory across all grades in India, but major projects (CPWD, PSU, NBCC) require it. Verify the IS mark on the bundle tag and MTC.
IS 14246:2005 | Also: JIS G3312 (Japan) | ASTM A755 (USA) | EN 10169 (EU)In India, first-choice PPGI/PPGL mills are JSW Steel, TATA BlueScope, NIPPON Steel India, BHUSHAN Steel. Re-roller and secondary material looks identical but has inconsistent coating. Verify mill brand on coil tag / MTC — not just the distributor's invoice.
Tier 1 India: JSW | TATA BlueScope | NIPPON | BHUSHAN | ESSAREach bundle should have a label showing: Mill name, coil number, BMT, zinc coating class, paint type, colour RAL code, width, length and weight. If the label is missing or hand-written, do not accept the material without verification.
Check: Coil No. | BMT mm | Zinc class | Paint | RAL | Width | Length | WeightA quick spot check — weigh one bundle and cross-check against calculated weight (BMT × area × density). If actual weight is more than 5% below calculated, the BMT or coating may be undersized. Reject or dispute before unloading full delivery.
Use this page's calculator to check expected bundle weight vs. actual weightInspect cut edges for excessive burr (sharp metal edges that tear workers' hands and allow early corrosion). Check painted surface for paint holidays (bare spots), pinholes and fish-scale defects. Reject sheets with more than 3 holidays per m².
Acceptable: ≤3 holidays/m² | Edge burr: clean cut only | No delaminationMajor mill brands (TATA BlueScope, JSW) offer 10–25 year written warranties on PPGL products for India. Distributor verbal warranties mean nothing — get the manufacturer's warranty document before project acceptance. Confirm what the warranty covers (perforation only vs. colour fade vs. delamination).
JSW Colour Coat: up to 15 yr | TATA Zincalume: 10–25 yr structural | Get in writingCommon questions about PPGI / PPGL roofing sheet weight, specification and buying in India