Phone:
(701)814-6992
Physical address:
6296 Donnelly Plaza
Ratkeville, Bahamas.
A galvanized metal roof is one of the most popular roofing options used in homes, warehouses, and factories. Known for its durability, corrosion resistance, and long lifespan, it provides excellent protection in all weather conditions.
1. What Is a Galvanized Metal Roof?
A galvanized roof is made from steel sheets coated with zinc to prevent rust and corrosion. This protective zinc layer helps the roof withstand rain, sunlight, and harsh climates for decades.
| Property | Detail |
|---|---|
| Base Material | Carbon steel |
| Coating | Zinc (Hot-dip galvanization) |
| Thickness | 0.3mm – 1.2mm |
| Width | 750mm – 1250mm |
| Length | Custom (1m – 12m) |
| Surface Finish | Spangle / Matte / Bright |
| Coating Weight | 40–275 g/m² |
| Lifespan | 25–50 years |
2. Benefits of Galvanized Metal Roofs
Galvanized metal roofing offers a mix of strength, aesthetics, and cost savings.
Main advantages:
- Corrosion resistance – Zinc coating prevents rust and moisture damage.
- High strength – Steel core ensures structural reliability.
- Reflective surface – Reduces heat absorption and lowers cooling costs.
- Low maintenance – No frequent painting or coating required.
- Affordable – Lower cost than aluminum or stainless steel roofs.
- Eco-friendly – 100% recyclable and long-lasting material.
3. Types of Galvanized Metal Roofing
There are several types of galvanized roofing sheets, depending on surface texture and coating type.
| Type | Description | Application |
|---|---|---|
| GI Corrugated Sheet | Wavy pattern for strength and drainage | Residential & farm roofing |
| Galvalume Sheet | Zinc-Aluminum coating for extra corrosion resistance | Coastal or industrial areas |
| PPGI Sheet | Pre-painted galvanized sheet with color coating | Decorative roofing |
| Standing Seam Panel | Interlocking system for waterproof sealing | Modern buildings & warehouses |
4. Galvanized Metal Roof Price
The price of galvanized metal roofing depends on thickness, coating weight, and color finish.
| Specification | Thickness (mm) | Coating (g/m²) | Price Range (USD/m²) |
|---|---|---|---|
| Plain GI Sheet | 0.35 | 60 | $3.5 – $4.5 |
| Corrugated GI Sheet | 0.45 | 80 | $4.8 – $5.6 |
| Color-Coated PPGI | 0.5 | 100 | $6.0 – $7.5 |
| Galvalume AZ150 | 0.6 | 150 | $7.5 – $8.5 |
Note: Prices fluctuate with global steel and zinc markets. WORTHWILL ALUMINUM offers competitive factory pricing for galvanized and aluminum roofing panels.
5. How Long Does a Galvanized Metal Roof Last?
A galvanized metal roof lifespan ranges between 25–50 years, depending on the coating thickness, local climate, and maintenance.
- In humid or coastal areas, lifespan is typically 25–30 years.
- In dry or temperate climates, it can last 40–50 years or more.
Regular cleaning and inspections help extend the roof’s service life.
6. Comparison: Galvanized vs Aluminum Roof
| Feature | Galvanized Roof | Aluminum Roof |
|---|---|---|
| Weight | Heavier | Lighter |
| Corrosion Resistance | High | Very high |
| Lifespan | 25–50 years | 40–60 years |
| Reflectivity | Good | Excellent |
| Price | Lower | Higher |
| Maintenance | Low | Very low |
Conclusion: For affordable and durable roofing, galvanized metal is the best value. For long-term coastal protection, aluminum roofing performs better.
7. Common Applications
Galvanized metal roofs are used in various sectors because of their versatility and protection.
| Sector | Application Examples |
|---|---|
| Residential | Houses, carports, sheds |
| Industrial | Factories, warehouses, workshops |
| Agricultural | Barns, animal shelters, storage |
| Commercial | Shops, garages, markets |
| Public Projects | Schools, shelters, bus stations |
8. Installation Tips for Galvanized Roof
- Ensure the roof slope ≥ 10° for effective drainage.
- Use galvanized screws with rubber washers to prevent leakage.
- Avoid direct contact between copper and galvanized surfaces to prevent galvanic corrosion.
- Seal joints with silicone or butyl tape for better waterproofing.
- Inspect annually for scratches or rust spots.
9. Available Sizes and Customization
| Specification | Option |
|---|---|
| Sheet Width | 750mm / 914mm / 1000mm / 1200mm |
| Sheet Length | 1000mm – 12000mm |
| Thickness | 0.25mm – 1.2mm |
| Zinc Coating | Z40 – Z275 |
| Surface Type | Regular / Zero Spangle |
| Color | Silver, Blue, Red, Green (customizable) |
| Packing | Standard export wooden pallets |
Custom cutting and color coating are available for OEM roofing projects.
10. Why Choose Worthwill Aluminum
- Factory-direct supply of galvanized and aluminum roofing sheets
- Custom sizes from 0.25mm to 1.2mm thickness
- ISO-certified quality and strict coating inspection
- Fast delivery worldwide with export packaging
- Professional support for roofing project design
Contact Us:
Email: jane@wwaluminum.com
WhatsApp: +86 15736973771
Galvanized Metal Roofs
A galvanized metal roof offers the perfect mix of strength, weather protection, and cost efficiency. With a lifespan of up to 50 years, it remains one of the most reliable materials for industrial, commercial, and residential roofing.
