Galvanized Corrugated Roof Sheet

Galvanized corrugated roof sheets are zinc-coated steel panels featuring wave/trapezoidal patterns that enhance structural strength. With ‌60-275g/m² zinc layers‌ (hot-dip or electroplated), these sheets prevent rust while maintaining ‌0.12-6mm thickness‌ for versatile applications from barns to commercial complexes.

Galvanized Corrugated Roof Sheet Product Overview‌

Galvanized corrugated roof sheets are zinc-coated steel panels featuring wave/trapezoidal patterns that enhance structural strength. With ‌60-275g/m² zinc layers‌ (hot-dip or electroplated), these sheets prevent rust while maintaining ‌0.12-6mm thickness‌ for versatile applications from barns to commercial complexes.


‌5 Key Advantages‌

  1. ‌Superior Durability‌
    • 35+ year lifespan with Z275 coating (ISO 3575 certified)
    • Withstands 140km/h winds (EN 10143 wind uplift test)
  2. ‌Lightweight Design‌
    • 4.8kg/m² weight (0.5mm thickness) vs 42kg/m² concrete tiles
  3. ‌Easy Installation‌
    • Pre-punched holes every 600mm (AS 1397 compliant)
    • Compatible with standard M6 roofing screws
  4. ‌Aesthetic Flexibility‌
    • Accepts PVDF/polyester coatings in 20+ RAL colors
  5. ‌100% Recyclable‌
    • 85% recycled steel content (LEED v4.1 compliant)

‌Technical Specifications‌

Parameter Detail
‌Dimensions‌ 600-1500mm width × 1-12m length (customizable)
‌Coating Types‌ Zero/Normal/Large Spangle (ASTM A653)
‌Yield Strength‌ 220-550 MPa (S220GD to S550GD grades)
‌Corrosion Resistance‌ Salt spray 480-2000hrs (ISO 9227)
‌Thermal Expansion‌ 11.7 µm/m°C (20-100°C range)

‌Material Comparison‌

Feature Galvanized Steel Traditional Clay Tile
Weight 5.2kg/m² 42kg/m²
Installation Time 150m²/day 40m²/day
Lifespan 35-50 years 75-100 years
Cost (per m²) 8.5−15 25−40

‌Installation Guide‌

  1. ‌Slope Requirements‌
    • Minimum 5° pitch for water drainage (BS 5534 standard)
  2. ‌Fastening Protocol‌
    • Use neoprene-washered screws every 3rd corrugation
    • 10mm edge overlap for 600mm-wide panels
  3. ‌Cutting Tools‌
    • Nibbler/shear preferred (avoid angle grinders)

‌Environmental Recommendations‌

Location Zinc Coating Additional Protection
Coastal Z275 + PVDF Silicone edge sealing
Industrial Z180 + paint Anti-chemical primer
Arctic Z350 Thermal break layer

‌Maintenance Tips‌

  • ‌Annual Inspection‌: Check fastener tightness after first winter
  • ‌Cleaning‌: Soft brush + pH-neutral detergent (avoid abrasives)
  • ‌Repairs‌: Apply zinc-rich paint (≥94% Zn) to scratches

‌Why Choose Corrugated Sheets?‌

Compared to standing seam roofs, corrugated panels offer ‌40% lower material costs‌ while providing equal wind resistance. The ribbed design increases load capacity to ‌1.5kN/m²‌ (EN 1991-1-3 snow load standard).


Industry Fact‌: Over 60% of Australian farm buildings use Z275-grade corrugated roofing due to its hail resistance (AS 4046 Class 4).


‌Global Standards Cross-Reference‌:

Standard Equivalent Grades
ASTM A653 DX51D (US), SGCC (JP)
EN 10346 S320GD (EU), SGC490 (AS)
JIS G3302 SGCD4 (Asia), Z450 (Oceania)

‌Hot-Dip vs Electro-Galvanized‌:

  • ‌Hot-Dip‌: Thicker coating (Z275), better edge protection
  • ‌Electro‌: Smoother surface (Z60), ideal for pre-painting

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