Secondary GI Sheet Supplier Mumbai | Budget Galvanized Sheet Dealer

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Secondary Galvanized Iron Sheets (Secondary GI Sheet)
High Stock
Secondary Sheets (Cost-Effective)

Technical Profile

Aero Enterprises supplies secondary GI sheets (second quality galvanized iron sheets) in Mumbai at 15-20% discount versus prime material. Secondary galvanized sheets have minor cosmetic imperfections - slight coating variations, small surface marks, edge irregularities - but provide the same zinc coating corrosion protection (typically 10-15 year lifespan). Located in Vasai East, we stock thicknesses from 0.4mm to 1.2mm in standard 8x4 ft size with 80-120 GSM zinc coating, ideal for budget-conscious roofing and construction: warehouse sheds, industrial roofing, agricultural buildings, temporary structures, storage facilities, poultry sheds, and applications where perfect surface appearance is secondary to rust protection and cost savings. Same-day dispatch for Mumbai contractors with transparent quality disclosure.

“15-20% cheaper than prime GI - same corrosion protection, minor cosmetic marks.”
Market Rate
₹48,000/ Metric Ton
Min Gauge0.4 MM
Max Gauge1.2 MM

What are Secondary GI Sheets?

Secondary GI sheets (also called second quality, off-grade, or commercial seconds) are galvanized iron sheets that don't meet prime quality visual standards due to minor cosmetic defects from galvanizing process or handling. Common imperfections include: uneven zinc spangle distribution, slight coating thickness variations, small bare spots or thin coating areas (still above minimum standard), surface marks or scratches, edge irregularities, slight discoloration, or storage marks. Importantly, secondary GI sheets maintain adequate zinc coating for corrosion protection - typically 80-120 GSM total coating which provides 10-15 year rust-free life in normal environments. The base steel quality and structural strength remain equivalent to prime material. For roofing, sheds, and outdoor structures where cosmetic perfection is not required, secondary GI sheets offer substantial cost savings (15-20%) while maintaining functional rust protection.

Industrial Applications

Material Integrity

standard
IS 277 (coating adequate for outdoor use)
coating
80-120 GSM (may have variations)
condition
Secondary/Off-Grade (cosmetic imperfections)
discount
15-20% vs prime material
corrosion life
10-12 years normal environment

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Technical Q&A

Verified Procurement Intelligence

Will secondary GI sheets rust faster than prime?
Secondary GI sheets have 80-120 GSM coating providing 10-12 year rust-free life vs 12-15 years for prime 120 GSM. The difference is 2-3 years, but you save 15-20% cost upfront. For warehouse/shed roofing with 15-20 year life expectancy, secondary GI is cost-effective.
How much can I save on roofing with secondary GI?
For 1000 sq ft roofing project using 0.5mm GI: Prime cost = ₹38,500, Secondary cost = ₹32,000 (saving ₹6,500). For 5000 sq ft warehouse: saving ₹32,500. Significant cost reduction for large projects without compromising functional protection.
Can secondary GI sheets be used for corrugated roofing?
Yes, excellent for corrugated roofing! The profiling process (corrugation) actually hides minor coating imperfections. Many roofing contractors prefer secondary GI for corrugated sheets because: 1) Cost savings, 2) Imperfections become invisible after profiling, 3) Structural performance identical to prime.
Are secondary GI sheets suitable for coastal areas?
For inland/normal environments - yes, 10-12 year life. For direct coastal exposure (within 5km of sea), we recommend prime GI with 180-275 GSM coating for maximum protection. Secondary GI in coastal areas may last 6-8 years vs 10-12 years for prime.
Can I see the coating quality before buying?
Yes! We encourage site visits to inspect coating condition. For bulk orders (50+ sheets), we provide detailed photos showing spangle pattern, coating uniformity, any bare spots or marks. We're transparent about condition - you'll know exactly what you're getting.
What thickness is best for warehouse roofing?
For permanent warehouse roofing: 0.6-0.8mm recommended for durability and foot traffic during maintenance. For temporary sheds: 0.4-0.5mm is economical. Thicker material (0.8-1.0mm) for areas with heavy rain, hail, or snow load.
Will bare spots cause immediate rusting?
Small bare spots in secondary GI don't cause immediate rust because: 1) Surrounding zinc provides cathodic protection (sacrificial anode), 2) Most 'bare spots' still have thin coating (just below spec), 3) Proper roof pitch prevents water pooling. Expected life: 10-12 years vs 12-15 for prime.
Do you deliver secondary GI in Navi Mumbai and Thane?
Yes, delivery across Mumbai, Navi Mumbai, Thane. Free delivery for 100+ sheets in Mumbai region. For large roofing projects (500+ sheets), we arrange direct mill delivery. Same-day dispatch for Vasai-Virar contractors.
Can secondary GI be painted for better appearance?
Yes, secondary GI can be painted after light surface cleaning. Roof coating paints (acrylic or elastomeric) improve appearance and extend life by 5-7 years. Many contractors paint secondary GI for residential projects to achieve premium look at budget cost.
What if coating is worse than described?
We grade material as 'light variations' (minimal bare spots), 'moderate variations' (visible but adequate), or 'heavy variations' (budget grade). Returns accepted if condition worse than specified grade. We provide photos for bulk orders to avoid disputes.

Procure Secondary Galvanized Iron Sheets (Secondary GI Sheet)

Access Mill-Direct rates for Secondary Galvanized Iron Sheets (Secondary GI Sheet). Bulk tonnage discounts and precision slitting available at our Vasai Hub.

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