Standing Seam Roofing System- A versatile, architecturally superior and Weather proof roofing solution

What is standing seam Roofing system?

Standing seam metal roofing is a concealed fixed roof system which features vertical ribs with a flat space or pan in between. The side edges of one roof panel are zipped or seamed along the length with the adjoining roof panels. The roof panels are attached to the purlins or secondary members with specially designed clips or clamps.  The concealed fix system requires no piercing fasteners and helps provide weather tightness and superior resistance to wind uplift.

A Smart and sustainable Steel building technology
A: Standing seam roof profile    
Light Gauge Framing System Sustainable Steel building technology
B: Concealed fixing of standing seam roof profile on clips


What are the advantages of standing seam Roofing system?

Concealed fixed roofing system

Standing seam roofing comes with concealed fix system which requires no piercing fasteners and helps provide weather tightness and superior resistance to wind uplift. With no exposed fasteners, the straight lines of your roof remain clean and smooth.

Allows for Thermal expansion and contraction

This system is fixed over specially design clips such that it allows for lateral of roof movement which results from the thermal effect

Design flexibility

Standing seam roof systems available in tapered and curved sheets to fulfil the most challenging design criteria. Suitable for roofs with low slopes.

On-Site Roll-Forming

Standing seam roof systems can be manufactured on site using mobile roll-forming technology, which not only gives single length from the ridge of the roof to the eave, but also helps to make it a leak-proof structure with better control over quality installation.

Sleek, consistent, & modern look

Standing seam roof system is suitable for architectural applications because of its modern and clean look. In addition to the sleek, straight lines offered by this roof system, the roof can come in virtually any color, including custom colors, to match any structure.High design flexibility with multiple profile shapes makes it an architecturally superior roofing profile


Metal roofs are already a long lasting and low maintenance roofing solution, especially when compared to other roofing types. Since standing seam roofing comes with concealed fix system which requires no piercing fasteners, there are no instances of damaging or loosening of fasteners or the roof surface.

Standing seam roof system’s design flexibility, weather tightness and versatility makes it an excellent choice for architecturally superior buildings for commercial, industrial and infrastructural applications

Tata BlueScope Steel offers the most advanced and versatile standing roof systems in India with and MR 24 Roofing system and LYSAGHT® FLEXLOK 400 roofing system

MR 24 360 degree Standing Seam Roofing System

The MR-24® Roof System is like a monolithic steel membrane, covering your entire building. The panels are joined together with a Pittsburgh 360 degree double-lock standing seam, and fastened to the purlins with a unique clip formed into the seam. Independent surveys show that MR-24® Roof System is the most specified standing seam roof in the market, with more than two billion square feet installed since its introduction in 1969.

Click here for more information: solutions/lysaght/corrugated-roof-sheets-and-wall-cladding/mr24/


LYSAGHT FLEX-LOK concealed standing seam system is a roofing system with an innovative architectural appearance. It can be roll formed in flat, curved or tapered shape as per various architectural requirements and provide architects with a more flexible and creative roofing solution.

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Tata BlueScope Steel is one of the largest manufacturer roof and wall cladding products in India. Apart from roofing solutions, the range of products includes Decking sheets, Purlins, Solar Module Mounting Structures and allied accessories. For more information on our products and services please write us at

Factors to Be Considered While Designing A Roof System

Selecting & specifying the most appropriate roof system for a project requires solid past experience with several of the available materials and an understanding of roof assembly materials and system options. This article aims to provide design guidance for high-performance industrial roofing sheets. Shared below are the factors to be considered while designing an industrial roof system.

  1. Load Acting on The Roof: Roofs are constantly under pressure. A roof must be built to endure both upward and downward pressure acting on it. Here are a few weights that industrial roofing sheets are subjected to:
    • Dead Load: This includes the weight of the roof structure itself, self-weight of sheeting and purlins, rooftop solar, platforms and walkways along with all the permanently attached materials or structures. Metal roofing sheets in general, are stronger, yet lighter as compared to other roofing options.
    • Live Load: People walking or working on the roof contribute to a load of around 75kg/sqm (as per IS 875: Part 2)
    • Collateral Load: Any hanging load from purlins
    • Wind Uplift Load: Wind uplift load refers to the weight that hits the wall of a building and disperses upwards, creating an uplift force on the roof. This load is resisted by the roof’s downward pushing dead load.
  2. Effective Roof Slope
  3. Roof slope and Roof length play an important role in the selection of profile as well as in gutter design. An increase in the roof slope increases the discharge speed of the water, thereby affecting the gutter and downspout design measurements. A Shallow roof slope and a longer roof length with many numbers of end laps increase the vulnerability of water leakages as the wind will always carry water which will try to penetrate the end laps. In case of a longer roof with lesser crest depth, heavy rains will lead to greater accumulation of water towards eave gutter. This water will try to escape from side laps. If the site is located in a geography where there are high day and night temperature differences, the metal roof will undergo thermal expansion and contraction which will enlarge holes around the screw and lead to leakages. The best bet for shallow roof slope and longer roof will be concealed site roll formed single length panel.

  4. Choosing the Right Roof Profile and Its Thickness
  5. Roof profile sheets constitute a large part of a building surface and contribute to its aesthetics. It serves as a protection to the basic structure from dampness. Choosing the right roof profile includes considering both, the roof slope and the general view of the building. Low-slope roofs require wide-based profiles to allow the rainwater to discharge. Steeper slopes enable to use more patterned profiles. Thickness of the roof profile  plays an important role based on the purlin spacing.

  6. Effective Purlin Spacing
  7. Purlins are secondary members mounted on Columns and Rafters. Usually, Roof Purlins support the Roof Sheets, Insulation, Vapour barrier etc.  Design of purlins depends upon the Loads on the roof, hanging (collateral) loads under the purlin and Span of the purlin. Some commonly used purlin shapes are ZEE, ZED and CEE purlins which are required for Steel Buildings. Purlin spacing varies basis the roof slopes.

  8. Optimized Purlin Section
  9. Based on wind pressure, every building structure has 2 zones: end zones & intermediate zones. For both the zones, purlin shape and thickness are designed to match the loads. Tata BlueScope Steel has 3 kinds of Purlins:

    1. CEE Purlins
    2. ZED Purlins
    3. ZEE Purlins

    The purlin spacing is adjusted based on the calculation of complete wind load in any building.

  10. Coating Mass and Paint System of Roof Materials
  11. Roof coatings are designed for adding a protective layer to the roof. It increases the service life of roof assemblies LYSAGHT® range of premium pre painted roofing sheets and wall cladding sheets are manufactured from high-strength steel; COLORBOND® steel and ZINCALUME® steel for longer lifespan. Zn-Al alloy coated steel ensures excellent corrosion resistance that enables longer life under extreme weather conditions, specifically for Industrial buildings, Pre Engineered buildings, infrastructure applications, Light Gauge Steel framing systems and commercial applications Wall cladding and roofing products made from COLORBOND® steel roof sheets are termite and fire-resistant.

Tata BlueScope Steel is one of the leading roofing sheets manufacturers in India. Apart from roofing solutions, the range of products includes Wall Cladding sheets, Decking sheets, Purlins, Solar Module Mounting Structures and allied accessories.