Bare Galvalume Sheet Solutions

Bare Galvalume Roofing Sheets for Durable Industrial Roofs

High-strength Galvalume roofing sheets designed for corrosion resistance, heat reflectivity, weather protection, and long service life across factories, warehouses, PEB buildings, industrial sheds, and commercial roofing applications.

Superior Corrosion Protection with Bare Galvalume Sheets.

Bare Galvalume sheets feature an advanced aluminium-zinc alloy coating that delivers exceptional corrosion resistance, heat reflectivity, and long-term durability without the need for paint. Combining the protective properties of aluminium with the sacrificial protection of zinc, these sheets offer significantly longer service life than conventional galvanised steel. Their natural metallic finish, low-maintenance performance, and suitability for roofing, cladding, agricultural, industrial, and architectural applications make them a reliable choice for projects requiring lasting protection and a clean, modern appearance.

55% Al / 43.4% Zn / 1.6% Si Alloy Coating 2–4× Corrosion Life vs Equivalent Galvanised Natural Metallic Finish No Paint Maintenance High Heat Reflectivity & Thermal Performance

Pre-Engineered Buildings by Alfa PEB Limited

Why Choose Alfa PEB for Bare Galvalume Roofing Sheets?

Alfa PEB Limited provides high-quality bare Galvalume roofing sheets designed for corrosion resistance, heat reflectivity, weather protection, and long-lasting roofing performance. Our non-colour Galvalume sheets are suitable for factories, warehouses, industrial sheds, logistics centers, commercial buildings, aircraft hangars, auditoriums, and infrastructure roofing projects.

Excellent Corrosion Resistance

Aluminium-zinc alloy coating helps protect the steel surface from rust, moisture, oxidation, and harsh outdoor conditions.

High Heat Reflectivity

Natural Galvalume finish reflects heat and supports better roof performance in hot climatic conditions.

Long Service Life

Durable coating and strong steel base ensure reliable long-term performance for industrial and commercial roofing.

Weather Protection

Designed to perform under sunlight, rain, wind, humidity, and changing weather conditions.

Lightweight Roofing Solution

Easy-to-handle roofing sheets help reduce structural load and support faster installation.

Low Maintenance Performance

Non-colour Galvalume finish requires minimal maintenance and supports cost-effective roofing performance.

Technical Details.

Specifications

Bare Galvalume Roofing Sheet Specifications.

01/02

Alfa PEB Limited offers high-quality bare Galvalume roofing sheets designed for strength, corrosion resistance, weather protection, and long-term roofing performance. These non-colour Galvalume sheets are suitable for industrial buildings, warehouses, factories, PEB structures, commercial projects, and metal roofing applications.

Our bare Galvalume sheets are available in different coating masses, yield strengths, thicknesses, widths, and profiles to meet various roofing and cladding requirements.

Specification	Bare Galvalume Roofing Sheet
Coating Mass	70 AZ / 150 AZ / 200 AZ
Yield Strength	550 MPa / 350 MPa
Sheet Thickness	0.30 mm, 0.35 mm, 0.40 mm, 0.45 mm, 0.47 mm, 0.50 mm, 0.55 mm, 0.60 mm
Colour / Finish	Natural / Non-Colour Finish
Width	1.06 m / 1.085 m
Pitch: Crest to Crest	200 mm / 250 mm
Maximum Length	Up to 15 m

Advantages

Advantages of Bare Galvalume Roofing Sheets.

02/02

Bare Galvalume roofing sheets provide excellent corrosion resistance, heat reflectivity, durability, weather protection, and low maintenance performance. Their aluminium-zinc alloy coating helps protect the steel surface from rust, moisture, oxidation, and harsh outdoor conditions.

Alfa PEB bare Galvalume sheets are lightweight, strong, and suitable for long-lasting roof and wall cladding applications. They are ideal for factories, warehouses, industrial sheds, commercial buildings, PEB structures, and metal roofing projects.

Advantage	Short Description
Excellent Corrosion Resistance	Aluminium-zinc coating helps protect the sheet from rust, moisture, and oxidation.
High Heat Reflectivity	Natural Galvalume finish reflects heat and supports better roof performance in hot climates.
Long Service Life	Durable coating supports long-term roofing performance in industrial and commercial buildings.
Weather Protection	Performs well under sunlight, rain, wind, and changing outdoor conditions.
Lightweight Roofing	Easy to handle and install, reducing structural load and installation time.
Low Maintenance	Non-colour Galvalume finish requires minimal maintenance compared to conventional roofing materials.

Advantages

Advantages of Multi-Storey Steel Building Systems.

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Multi-storey steel building systems offer a faster, stronger, and more flexible solution for modern commercial, industrial, institutional, and infrastructure projects. With prefabricated steel components and factory-controlled manufacturing, these structures help reduce construction time, improve quality, and support efficient multi-floor development.

Alfa PEB Limited designs and manufactures customized multi-storey pre-engineered steel buildings with high structural strength, flexible layouts, optimized land usage, low maintenance, and long-term durability. These systems are suitable for offices, hospitals, schools, hostels, hotels, retail complexes, parking structures, industrial buildings, and commercial facilities.

Advantage	Short Description
Faster Construction	Prefabricated steel components enable quick site assembly and reduce project timelines.
Cost-Effective Solution	Optimized steel design and faster completion help reduce overall construction cost.
High Structural Strength	Engineered steel frames provide excellent stability and load-bearing capacity for multi-floor buildings.
Flexible Floor Layouts	Steel building systems allow customized layouts, spans, heights, and functional space planning.
Optimized Land Usage	Multi-storey construction helps create more usable floor area within limited land space.
Factory-Controlled Quality	Precision-made components ensure consistent quality, accurate fitment, and reliable performance.
Low Maintenance	Durable steel framing and quality surface protection support long service life.
Easy Expansion	Buildings can be designed for future vertical or horizontal expansion with better adaptability.

Primary Steel Framing

Primary Steel Framing.

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Alfa PEB Limited manufactures precision-engineered primary steel framing systems for pre-engineered buildings. Designed by experienced engineers and fabricated under quality-controlled plant conditions, our steel frames ensure strength, accuracy, durability, and reliable performance.

Our primary framing systems include columns, rafters, beams, and built-up steel sections suitable for factories, warehouses, industrial sheds, logistics facilities, and commercial steel buildings.

Applications.

Warehouses

Durable roofing solution for storage and logistics buildings requiring long-term weather protection.

Factories & Manufacturing Units

Suitable for industrial roofing where strength, corrosion resistance, and durability are important.

Logistics Centers

Reliable roof coverage for distribution hubs, loading areas, and supply chain facilities.

Food Processing Units

Corrosion-resistant roofing for processing and packaging facilities exposed to moisture and heat.

Textile Buildings

Strong and heat-reflective roofing for textile production, storage, and processing units.

Aircraft Hangars

Suitable for large-span roofing applications requiring durability and weather resistance.

Auditoriums & Exhibition Halls

Long-lasting roofing solution for public, commercial, and large covered spaces.

Defense Structures

Durable Galvalume roofing for defense buildings, storage shelters, and infrastructure facilities.

FAQ

FAQ's

Galvanised steel uses a pure zinc coating that provides corrosion protection primarily through sacrificial galvanic action the zinc corrodes preferentially to protect the steel beneath. Galvalume uses a 55% aluminium – 43.4% zinc – 1.6% silicon alloy coating. The aluminium component forms a dense, adherent aluminium oxide layer on the coating surface that acts as a highly effective barrier against corrosive attack significantly slowing the rate at which the coating is consumed by corrosion. The zinc component provides sacrificial galvanic protection at cut edges and damaged areas. The combined result is a coating that provides two to four times the corrosion life of an equivalent zinc coating weight in most atmospheric exposure environments and in aggressive coastal, industrial, and high-humidity conditions, the performance advantage is typically at the higher end of this range or beyond.

Bare galvalume sheets are available in AZ100 (100 g/m² total two-side coating weight), AZ150 (150 g/m²), and AZ185 (185 g/m²) with higher coating weights providing proportionally longer corrosion protection life in a given environment. The correct coating weight is selected based on the project's corrosion category (C1–C5 per ISO 9223), the design life requirement, and the proximity to corrosion-accelerating factors. As a general guide: AZ100 is suitable for standard inland industrial and commercial environments with moderate design life requirements; AZ150 is specified for coastal environments (within 10–15km of the sea), high-humidity industrial zones, and agricultural applications where an extended corrosion protection life is required; AZ185 is used for the most demanding coastal and industrial corrosion environments or where the maximum available coating protection life is required for the project specification.

No bare galvalume does not require painting, priming, or any factory or site-applied surface treatment. The metallic alloy coating is the complete corrosion protection system. On initial installation, the surface has a bright silver-grey metallic appearance. Over time with outdoor exposure, the surface weathers to a stable, uniform mid-grey patina a normal characteristic of the aluminium oxide weathering process after which the surface condition remains stable and continues to protect the steel substrate beneath for the coating's full service life. Routine maintenance consists of periodic cleaning to remove atmospheric deposits, biological growth, and industrial contamination that can trap moisture or accelerate localised surface staining. No repainting, coating inspection, or surface treatment programme is required at any point in the building's service life.

Yes bare galvalume has several important material compatibility requirements that must be managed in installation. Contact with dissimilar metals (particularly copper and its alloys) must be avoided copper run-off from rooftop copper components or copper plumbing overflows will accelerate galvalume corrosion at the contact zone through a galvanic cell reaction. Contact with wet concrete, mortar, or lime-based materials must also be avoided alkaline run-off attacks the aluminium component of the galvalume coating. Fasteners must be compatible stainless steel, aluminium, or galvalume-coated fasteners are specified; carbon steel fasteners corrode and stain the sheet surface. These compatibility requirements are standard for galvalume installations and are covered in our technical installation guidance supplied with every order.

Yes bare galvalume coil is routinely roll-formed into trapezoidal, corrugated, standing rib, and other standard roofing and cladding profiles by profiling mills. The galvalume coating maintains its adhesion and integrity through the roll-forming process provided that the bend radius-to-thickness ratio is within the specified limits for the coating weight and steel grade which standard roofing profiles are designed to meet. For projects where profiled galvalume sheeting is required, coil can be supplied to a profiling mill for roll-forming to your specified profile, or pre-profiled cut-to-length sheets can be supplied directly if roll-forming services are part of our project scope for your order.

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