FAQs
Frequently Asked.
Expertly Answered.
Simplifying the things
you want to know.

What are colour-coated roofing sheets?

Colour-coated roofing sheets are pre-painted steel sheets designed for roofing and cladding applications. They offer high durability, corrosion resistance, and long-lasting colour retention, making them ideal for industrial, commercial, and residential buildings.

Modern, durable, and visually appealing - colour-coated roofing sheets are the smart choice for long-lasting roofing and cladding solutions.

What is the difference between PPGI and PPGL sheets?

PPGI (Pre-Painted Galvanised Iron) uses a zinc coating, whereas PPGL (Pre-Painted Alu-Zinc Coated Steel) uses an aluminium-zinc alloy, offering better corrosion resistance -especially in coastal or humid conditions.

What are the advantages of using colour-coated roofing sheets?

  • High Durability: They offer excellent resistance to rust, corrosion, and extreme weather conditions.
  • Aesthetic Appeal: Available in a variety of colors and finishes, they add a modern look to buildings.
  • Lightweight: Easier to handle and install compared to traditional roofing materials.
  • Low Maintenance: Require minimal upkeep, making them cost-effective in the long run.
  • Eco-Friendly:Many are recyclable and manufactured sustainably.

What materials are used for colour-coated roofing sheets?

These sheets are typically made from galvanized steel or Alu-Zinc alloy coated steel, with a protective layer of paint applied through a continuous coating process.Coating System typically includes:

  • Metallic coating (Zn / Al-Zn)
  • Primer layer
  • Top coat (polyester / SMP / PVDF depending on performance requirements)

Are colour-coated sheets resistant to weather conditions?

Yes, they are designed to withstand extreme weather conditions such as heavy rains, strong winds, and high temperatures. Some coatings also offer UV protection for added longevity.

How do I maintain colour-coated roofing sheets?

  • Clean the sheets periodically to remove dirt, debris, and pollutants.
  • Inspect for damage or scratches and touch up paint, if necessary.
  • Avoid using abrasive cleaning tools to prevent scratches.

Are colour-coated roofing sheets energy-efficient?

Certain colour-coated sheets are available with solar-reflective coatings that reduce heat absorption, keeping interiors cooler and lowering energy costs.

What thickness should I choose for colour-coated roofing sheets?

The thickness depends on the application:

  • Residential roofs: 0.35 mm to 0.50 mm.
  • Industrial and commercial roofs: 0.47 mm to 0.60 mm.

Are colour-coated sheets suitable for coastal or industrial areas?

Yes, but it is recommended to use higher-grade coatings like PVDF paint systems together with appropriate metallic coating mass for enhanced corrosion resistance in such environments.

Can colour-coated sheets be installed over existing roofs?

Yes, in many cases they can be installed over existing structures, provided proper support and alignment are ensured.

What roof slope is recommended for colour-coated sheets?

The recommended minimum roof slope depends on the sheet profile and manufacturer's installation guidelines. A minimum slope (typically around 5 - 10 degrees, depending on profile) is recommended to ensure proper water drainage.

Can these sheets be curved or bent?

Yes, they can be roll-formed, curved, or customized depending on the project requirements and profile type.

Are colour-coated sheets more expensive than traditional roofing?

The cost varies based on the material, thickness, coating type, and design. While they may have a higher upfront cost than some traditional materials, their longevity and low maintenance make them cost-effective over time.

Do colour-coated sheets come with warranties?

Yes. Our Jindal Sabrang and Jindal Neucolor+ range come with manufacturer warranties, with duration varying by product type and specification. Jindal Neucolor+ comes with a 15-year warranty, while Jindal Sabrang carries a warranty of 7 years.

How are colour-coated sheets installed?

They are installed using self-drilling screws, ensuring a secure and leak-proof fit. Proper sealing and overlap are essential to prevent water ingress.

Can colour-coated sheets be used for cladding?

Yes, these sheets are versatile and can be used for wall cladding, providing both functional and aesthetic benefits.

Why choose Jindal (India) Ltd. for colour-coated roofing sheets?

Jindal (India) Ltd. offers premium-quality colour-coated roofing sheets manufactured with advanced technology and strict quality standards. Our products are durable, stylish, and eco-friendly, making them a reliable choice for all your roofing needs.

What types of roofing solutions does Jindal (India) Ltd. offer?

We offer a wide range of pre-painted and bare metal roofing solutions, including colour-coated galvanized and Zinc-Aluminium sheets, specially designed for industrial, commercial, agricultural, and residential applications.

What quality tests are done on your colour-coated sheets?

Our colour-coated sheets undergo a comprehensive series of quality tests to ensure performance, durability, and compliance with standards. These tests typically include:

  • Adhesion Test (T-Bend / Reverse Impact): Ensures the coating adheres properly and resists cracking or peeling during forming.
  • Coating Thickness Measurement: Verifies uniform paint and metallic coating thickness for corrosion protection.
  • Scratch and Abrasion Resistance: Confirms surface durability under handling and installation.
  • Gloss and Colour Consistency: Measures aesthetic properties to ensure uniform appearance.
  • Salt Spray Test: Simulates harsh environments to test corrosion resistance.
  • Pencil Hardness Test: Assesses surface hardness and resistance to marring.
  • Flexibility / Bend Tests: Ensures the sheets can be shaped without damaging the coating.
  • UV/Weathering Tests: Evaluates long-term colour retention and coating integrity under sunlight exposure.

Why should steel sheets be used for sandwich panels?

Steel sheets are the preferred choice for sandwich panels because they provide excellent strength, durability, and protection. High-quality pre-painted galvanized (PPGI) or Alu-Zinc Coated Steel (PPGL) facings offer superior corrosion resistance, ensuring long service life even in harsh environments. Steel also delivers consistent flatness and dimensional accuracy, making fabrication and installation easier.

What is Aluminium-Zinc coated steel?

Aluminium-Zinc coated steel is a carbon steel substrate coated with an alloy of aluminium (typically ~55%), zinc (~43.5%), and silicon (~1.5%). This combination offers superior corrosion resistance and heat reflectivity compared to conventional galvanized steel.

What are the key advantages of Aluminium-Zinc coated steel?

  • Superior corrosion resistance (especially in humid and industrial environments)
  • Longer service life than standard galvanized steel
  • High heat reflectivity, improving energy efficiency
  • Better resistance to oxidation at elevated temperatures
  • Smooth, uniform surface finish

How is it different from galvanized steel (GI)?

Galvanized steel uses only zinc coating, while Aluminium-Zinc steel uses an aluminium-zinc alloy. The aluminium provides barrier protection, while zinc offers sacrificial protection -resulting in better overall durability.

Is Aluminium-Zinc coated steel suitable for coastal areas?

Yes, it performs better than galvanized steel in coastal and humid environments. However, for highly aggressive marine conditions, additional coatings or paint systems are recommended.

Can Aluminium-Zinc coated steel be painted?

Yes, it can be pre-painted (PPGL) or post-painted. Pre-painted versions offer enhanced aesthetics and additional protection.

Can it be used without paint (bare finish)?

Yes, it is often used in its bare metallic finish, which offers a distinctive look along with durability.

What applications is your Al-Zn coated steel suitable for?

Our Al-Zn coated steel is ideal for:

  • Solar panel mounting structures (ground-mounted and rooftop)
  • Support frames and racking systems
  • Cable trays and structural components in solar farms

Why use Al-Zn coated steel for solar mounting structures?

Al-Zn coated steel offers superior corrosion resistance compared to regular galvanized steel, ensuring long-term durability and low maintenance even in harsh outdoor environments.

Why is Jindalume a good choice for solar mounting structures?

Jindalume (aluminium-zinc coated steel) is an ideal material for solar mounting structures due to its high corrosion resistance, durability, and strength-to-weight ratio. It performs exceptionally well in outdoor conditions, including high heat, humidity, and industrial environments - ensuring long-term structural reliability for solar installations. Its superior reflectivity also helps reduce heat build-up, while its low maintenance requirement and long service life make it a cost-effective choice over the project lifecycle.

Why is Jindalume a good fit for appliances?

Jindalume (aluminium-zinc coated steel) is widely used in appliances because it offers excellent corrosion resistance, heat resistance, and durability. It performs reliably in high-temperature and moisture-prone environments - making it ideal for products like air conditioners, refrigerators, washing machines, ovens, and water heaters. Its smooth surface finish also supports better coating adhesion and aesthetics, while its strength and formability enable precise manufacturing of appliance components.

Where are your API pipes used?

Our pipes are used in oil and gas transmission pipelines, distribution networks, gathering lines, slurry pipelines, and structural applications in oil and gas facilities.

Do you provide coatings or surface treatments?

Yes. Our pipes can be supplied with various internal and external coatings (e.g., FBE, 3LPE) to enhance corrosion resistance and extend service life.

Do your pipes meet international quality standards?

Absolutely. We maintain stringent quality controls, with products conforming to API, ASTM, and other relevant global standards, backed by thorough testing and certification.

What quality tests are performed on your API pipes?

Our pipes undergo rigorous testing, including:

  • Hydrostatic testing
  • Non-destructive testing (e.g., ultrasonic, radiography)
  • Mechanical testing (tensile, impact)
  • Dimensional inspection
  • Chemical analysis

Can you supply large project quantities?

Yes. We have the production capacity and logistics support to meet bulk requirements for major pipeline projects, both in India and for export.

What are ERW pipes?

ERW (Electric Resistance Welded) pipes are steel pipes made by rolling metal and welding it longitudinally. They are known for uniform wall thickness, strong weld seams, and cost-effective production.

What is the difference between black and GI pipes?

  • Black pipes are untreated steel pipes used for non-corrosive applications such as water transportation, scaffolding, and structural work.
  • GI pipes are galvanized steel pipes coated with zinc to prevent corrosion, making them ideal for plumbing, water supply, fencing, and outdoor structures.

Are your GI pipes corrosion-resistant?

Yes. Our galvanized (GI) pipes have a uniform zinc coating that protects against rust and corrosion, ensuring long service life in outdoor and wet environments.

What quality tests are performed on your pipes?

We conduct rigorous quality checks, including:

  • Hydrostatic testing
  • Weld seam integrity testing
  • Dimensional accuracy checks
  • Zinc coating weight measurement (for GI pipes)
  • Visual and surface inspections

What are hollow section pipes?

Hollow section pipes are steel tubes with a hollow cross-section, typically square or rectangular. They offer excellent strength-to-weight ratios and are widely used in construction and structural engineering.

Are your hollow sections suitable for welding and fabrication?

Yes. Our pipes are manufactured with excellent weldability and dimensional consistency, making them easy to process, assemble, and install.

What quality checks are performed on your hollow section pipes?

Our products undergo rigorous quality tests, including:

  • Dimensional accuracy checks
  • Weld seam integrity testing
  • Mechanical property testing (tensile, yield)
  • Visual and surface inspection

What is Metal Beam Crash Barrier?

Metal beam crash barriers are vital road safety systems designed to keep people or vehicles from straying into off-limits areas and to provide railing protection to motor vehicles in areas such as steep slope, high embankment, obscure curve/ bend or sharp corner, thus preventing accidents and protecting drivers.

What are the types of Metal beam Crash barriers?

There are two main types:

  • W-Beam Crash Barriers – Feature a ‘W’ shaped corrugated steel panel, commonly used on highways and expressways.
  • Thrie Beam Crash Barriers – Have an extra corrugation for increased strength, ideal for high-risk areas requiring enhanced protection.

Why Metal Beam Crash Barrier is required?

Metal Beam Crash Barrier is required to absorb sudden impact or collision and to minimize injury. It acts as a directional path for moving vehicle, as a protective barrier to avoid pedestrians/ animals and as a visual guide during the bad weather. They create a strong shield against potential hazards, ensuring reliability and maximum protection for drivers and passengers.

Are W-beam crash barriers the same as guardrails?

Yes. W-beam crash barriers and guardrails are the same and serve the same purpose—protecting vehicles from veering off the roadway during accidents. They are essential safety components across various transportation infrastructures, enhancing road safety and minimizing impact risks.

What is the difference between W-beam crash barriers and concrete barriers?

W-beam crash barriers, made of galvanized steel, are designed to flex and absorb impact energy, safely redirecting vehicles. Concrete barriers, being rigid, can cause harsher impacts and potential vehicle damage. The choice depends on road conditions, traffic flow, and safety needs.

Why Thrie Beam is a better choice over other barriers?

Thrie Beam barriers offer enhanced strength and effectiveness compared to traditional W-Beam barriers. Their additional corrugation increases stiffness, improving vehicle containment and redirection. This design minimizes the risk of smaller vehicles slipping through, making Thrie Beam barriers ideal for applications requiring higher impact resistance and safety.

What are the benefits of using Jindal Crashsafe Thrie Beam barriers?

Engineered for durability and compliance with international standards, Jindal Crashsafe Thrie Beam barriers provide superior strength and reliability across various environments.

What are the key installation requirements and processes for Crash barriers?

Jindal India’s Crash barriers are designed for easy installation across diverse road conditions. We recommend professional installation for optimal alignment and safety and regular inspections to further enhance performance.

What maintenance procedures are recommended for crash barriers?

Crash barrier maintenance involves regular inspections for damage or wear, ensuring continued reliability. Routine checks, debris removal, and corrosion prevention measures help maintain optimal performance, extending the barrier’s durability and effectiveness.

How are Jindal Crashsafe Crash barriers tested?

Jindal Crashsafe Metal Beam Crash Barriers undergo rigorous crash tests to assess deflection, strength, and vehicle containment. Compliance with Indian, American, and European safety standards ensures their reliability and proven effectiveness.

What types of aluminium foils do you manufacture for pharma use?

We supply high-quality aluminium foils designed specifically for pharmaceutical packaging applications, ensuring product safety, hygiene, and extended shelf life. Our foils are used for blister packs, strip packs, cold-formed foils, and sachet packaging - protecting tablets, capsules, and powders from moisture, light, and contamination.

Why is aluminium foil preferred for pharmaceutical packaging?

Aluminium foil is an effective barrier against moisture, oxygen, light, and bacteria. It preserves drug potency, extends shelf life, and ensures patient safety.

Do your pharmaceutical foils meet regulatory standards?

Yes. Our foils comply with relevant pharmacopeia and packaging standards, ensuring suitability for pharmaceutical use.

How do you ensure the quality of your pharma foils?

We follow rigorous quality control processes including Gauge and thickness testing, Pin-hole detection, Adhesion and sealing tests, Visual inspection and Compliance with regulatory guidelines.

Why is aluminium foil popular in food packaging?

Aluminium foil is an excellent barrier against moisture, oxygen, light, and contaminants. It keeps food fresh, preserves taste, and extends shelf life while being safe for direct food contact.

Is your aluminium foil food-grade?

Yes. Our foils are manufactured using food-safe processes and meet regulatory standards for direct contact with food.

What thicknesses and sizes do you offer?

We offer a wide range of thicknesses and roll widths to meet diverse food packaging needs. Please check our product section for the comprehensive range offered by us.

How do you ensure the quality of your food-grade foil?

Our foils undergo strict quality control, including:

  • Thickness and gauge testing
  • Pin-hole detection
  • Surface quality checks
  • Compliance with food safety regulations