Product Description
The PPGI (Polyester-Painted Galvanized Iron) Roofing Sheet is a premium roofing solution integrating the corrosion resistance of galvanized steel with the decorative and protective benefits of a pre-painted polyester coating. Manufactured from 24-26 gauge (0.4-0.5mm) GI steel substrate with a 50-150g/m² zinc coating, the sheet features a dual-layer coating system: a epoxy primer for adhesion and a polyester topcoat (20-30μm thickness) in vibrant RAL colors. The surface may be smooth or stucco-embossed to enhance anti-slip properties and hide minor imperfections. Meeting ISO 15716 and AS/NZS 2728 standards, it offers a service life of 10-15 years in moderate climates, with optional PVDF coatings for 20+ years in harsh environments.
Features
Weathertight Performance: The polyester coating resists UV degradation, rain penetration, and thermal expansion, ensuring long-term waterproofing for roofs.
Aesthetic Flexibility: Available in 50+ RAL colors and customizable textures, enabling architects to match building designs while reducing on-site painting costs.
Lightweight & Strong: At 0.4-0.5mm thickness, it weighs 3-4kg/m², reducing structural load while supporting wind speeds up to 150km/h (with proper installation).
Energy-Efficient Design: Solar-reflective coatings (optional) can lower indoor temperatures by 3-5°C, reducing air conditioning costs in commercial and residential buildings.
Easy Installation: Pre-cut to standard lengths (e.g., 3m, 6m) with trapezoidal or corrugated profiles, compatible with common roofing accessories like ridge caps and gutters.
Application
Residential Roofing: Ideal for pitched or flat roofs in houses, villas, and townhomes, offering low maintenance and long-lasting color retention.
Commercial Buildings: Used for warehouse roofs, factory sheds, and retail complexes, combining durability with cost-effective thermal insulation.
Infrastructure Projects: Suitable for stadium roofs, airport terminals, and agricultural greenhouses, where fire resistance (non-combustible steel substrate) and weather resistance are critical.
Retrofitting Projects: Lightweight design allows easy installation over existing roofs without structural reinforcement, popular for renovation projects.
FAQ
Q: How does PPGI roofing compare to metal tile roofing?
A: PPGI sheets are more cost-effective and easier to install, while metal tiles offer superior aesthetics but higher weight and cost.
Q: Can I walk on PPGI roofing sheets?
A: Yes, with caution—use non-slip footwear and walk on purlin supports to avoid denting; embossed surfaces provide better traction.
Q: What is the recommended overlap for installation?
A: Overlap 80-100mm for corrugated profiles and 50-60mm for trapezoidal profiles to ensure water tightness.
Q: How do I repair a scratched coating?
A: Clean the area and apply a matching touch-up paint within 24 hours to prevent rust initiation.
Q: Is PPGI roofing compliant with fire safety standards?
A: Yes, the galvanized steel substrate is non-combustible, meeting Class A fire resistance ratings in most regions.
Roofing sheet / Corrugated Steel Sheet |
|
Standard | AISI,ASTM,GB,JIS | Material | SGCC,SGCH,G550,DX51D,DX52D,DX53D |
Thickness | 0.105—0.8mm | Length | 16-1250mm |
Width | Before Corrugated:762-1250mm |
After corrugated:600-1100mm |
Color | Top side is made according to RAL color, Back side is white grey in normal |
Tolerance | +-0.02mm | Zinc | 30-275g |
Weight |
Top Panit | 8-35 Microns | Back | 3-25 Microns |
Panit |
Basal Plate | GI GL PPGI | Normal | Wave Shape,T Shape |
Roof |
Shape |
Certification | ISO 9001-2008,SGS,CE,BV | MOQ | 25 TONS (in one 20ft FCL) |
Delivery | 15-20 days | Monthly Output | 10000 tons |
Package | seaworthy package |
Surface treatment | unoil,dry,chromate passivated, non-chromate passivated |
Spangle | regular spangle,minimal spangle, zero spangle,big spangle |
Payment | 30%T/T in advanced+70% balanced;irrevocable L/C at sight |
Remarks | nsurance is all risks and accept the third party test |
