Bare Galvalume Sheet
Overview
Bare Galvalume Sheets are premium-quality roofing and cladding materials designed for exceptional corrosion resistance, heat reflectivity, and durability. Made from a steel base coated with a special alloy of 55% aluminum, 43.5% zinc, and 1.5% silicon, Bare Galvalume Sheets deliver unmatched performance in harsh environmental conditions.
At BSSM Infra, we supply high-grade Bare Galvalume Sheets that meet international standards and are widely used across industrial, commercial, and residential applications. These sheets offer the perfect balance of strength, protection, and economy, making them the preferred choice for modern construction and pre-engineered building systems.
What is a Bare Galvalume Sheet?
A Bare Galvalume Sheet is a steel sheet without any paint or color coating — featuring a natural metallic finish. The aluminum-zinc alloy coating provides long-term corrosion resistance, while the silicon component enhances adhesion and durability.
This alloy coating protects the steel substrate both barrier-wise (via aluminum) and sacrificially (via zinc), making the sheet last significantly longer than conventional galvanized steel.
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Technical Specification
| Parameter | Specification |
|---|---|
| Base Metal | Cold Rolled Steel (CR) |
| Coating Composition | 55% Aluminum, 43.5% Zinc, 1.5% Silicon |
| Coating Mass | 70 AZ / 150 AZ / 200 AZ |
| Yield Strength | 550 MPa / 350 MPa |
| Thickness Range | 0.30 mm to 0.80 mm |
| Width | 900 mm to 1250 mm |
| Finish | Natural Silver Metallic |
| Surface Texture | Smooth / Spangle Finish |
| Maximum Length | Up to 15 meters |
| Tensile Strength | Minimum 550 MPa (optional grades available) |
Features & Advantages
- Superior Corrosion Resistance – Outlasts conventional galvanized sheets, especially in coastal and industrial environments.
- High Thermal Reflectivity – Reflects up to 75–80% of solar radiation, keeping interiors cooler.
- Longer Life Span – Lasts 2–4 times longer than galvanized steel in similar conditions.
- Attractive Appearance – Natural silver metallic look with a uniform spangle finish.
- Excellent Formability – Suitable for bending, roll forming, crimping, and profiling.
- Lightweight and Strong – High strength-to-weight ratio for easy handling and reduced structural load.
- Low Maintenance – Requires minimal upkeep over its long service life.
- Eco-Friendly – 100% recyclable and energy-efficient material.
- Pre-Engineered Buildings (PEB)
- Industrial Sheds and Warehouses
- Factory Roofing and Cladding
- Cold Storage Units
- Residential Carports and Canopies
- Solar Panel Mounting Structures
- Agricultural Buildings and Barns
- Ducting and Ventilation Systems
Why Choose Bare Galvalume Sheets
- High Heat & Corrosion Resistance: Performs exceptionally well in tropical and coastal climates.
- Energy Saving: Reflective surface helps reduce cooling costs.
- Excellent Surface Finish: Adds a clean, professional look to industrial and commercial buildings.
- Cost-Effective Alternative: Lower lifecycle cost compared to color-coated or galvanized options.
- Compatible for Coating or Painting: Can be post-painted if specific color or protection is required.
Comparison: Bare Galvalume vs. Galvanized Sheets
| Feature | Bare Galvalume Sheet | Galvanized Sheet |
|---|---|---|
| Coating Material | Aluminum-Zinc-Silicon Alloy | Zinc |
| Corrosion Resistance | Superior (2–4x longer life) | Moderate |
| Reflectivity | High (up to 80%) | Medium |
| Heat Resistance | Excellent | Fair |
| Appearance | Metallic Silver (Matte) | Bright Silver |
| Formability | Excellent | Good |
| Durability | 25–40 Years | 10–15 Years |
Quality & Manufacturing Excellence
At BSSM Infra, our Bare Galvalume Sheets are produced using state-of-the-art continuous hot-dip coating lines and advanced quality testing systems. Every sheet undergoes inspection for:
- Coating thickness and adhesion
- Surface uniformity
- Tensile and yield strength
- Spangle and gloss consistency
A Bare Galvalume Sheet is a steel sheet coated with an alloy of aluminum and zinc. It provides superior corrosion resistance, high reflectivity, and long-lasting performance, especially in outdoor applications.
While galvanized steel is coated with zinc, Galvalume is coated with a mix of 55% aluminum, 43.5% zinc, and 1.5% silicon. This composition offers better corrosion resistance and heat reflectivity than regular galvanized steel.
They are widely used for roofing, wall cladding, pre-engineered buildings (PEB), sheds, and industrial enclosures due to their strength and weather resistance.
Yes, Galvalume performs well in coastal and humid areas because of its enhanced resistance to rust and corrosion compared to standard steel sheets.
Yes. Although they already have a metallic finish, they can be painted or coated with color for additional protection or aesthetic purposes.
With proper installation and maintenance, Bare Galvalume Sheets can last over 40–50 years in normal conditions, significantly longer than galvanized steel.
Yes. The aluminum content gives Galvalume sheets high solar reflectivity, helping reduce heat absorption and maintaining cooler interiors.
Absolutely. Galvalume sheets are 100% recyclable, making them an eco-friendly building material option.
Bare Galvalume Sheets require minimal maintenance—just periodic cleaning and inspection to ensure debris or water doesn’t accumulate on the surface.
They are available in various thicknesses (generally 0.30 mm to 0.80 mm), depending on the application and structural requirements.
