If one were to look for an airport that best symbolises the burgeoning ambition of India’s aviation sector, it would be Bengaluru. With a capacity of up to 17 million passengers and stretching over 150,000m2, it’s the country’s third-busiest airport and one of its most recognisable thanks to its startling white roof.
The structure is testament to the powerful modernising impulse currently gripping aviation across the subcontinent.
Superior by design: the multipurpose alloy
The design for Bengaluru’s new terminal building sprang from the minds of architects at design company HOK, who in 2011 oversaw a $221 million expansion of the structure to accommodate the rising number of passengers and cargo flowing through the airport. Elval Colour’s orofe was chosen to cover 55,000m2 of HOK’s elegantly curved roof.
The lightweight coils, made from specially strengthened aluminium Alloy 3004, are durable and flexible, designed for corrugated or standing seam roofing solutions. Built to bend, orofe was the perfect choice for the sort of wave-shaped design that HOK had envisaged.
After casting, a special PVDF liquid-based paint was applied to the coils resulting in an optimum colour finish and superb durability.
“Consisting of two different major alloy categories, orofe was specifically designed for airport roofing and wall systems,” explains Stelios Siantikos, Elval Colour’s deputy commercial manager. “The alloy’s usefulness has since been found to stretch far beyond the airport environment.
“In fact, the range offers architects, builders and designers a lightweight and versatile alloy for almost any type of building.”
A team effort: cooperation is key
Founded in 1977 in Greece, Elval Colour exports its building envelope products to over 70 countries around the world. In addition to roofing, the company also provides aluminium composite panels (ACPs) for building facades.
Its etalbond A2 panel in particular adheres to the highest international fire safety standards, thanks mainly to its incombustible mineral core, and has proved aesthetically versatile. “It is the only material in its category that is lightweight, absolutely flat and easily formable,” says Siantikos.
Elval Colour prizes close working relationships with project managers, architects and developers, the better to deliver the very best solutions for its global client base.
“Elval Colour has in place a structured network of sales executives and technical teams able to cooperate with architects, customers and developers at a moment’s notice, so that everybody understands the precise requirements of each project,” says Siantikos.
On the approach: colours for exact specfications
This approach is supplemented by Elval Colour’s in-house coating development laboratory, which routinely creates custom colours and coatings for even the most exacting specifications. “Our target is to guide customers towards systems that are optimised for aesthetics as well as durability,” explains Siantikos.
“What’s more, durability dictates how a colour’s aesthetic attributes will last over time, as well as its integrity on the substrate – there must, after all, be a guarantee that the coating will not delaminate, crack, chalk, blister or fade away. “Do you know many European companies are capable of cladding 400,000m2 of an airport roof in China?” says Siantikos. “There are not many.”
At Zhengzhou, Elval Colour applied a specially made 1mm aluminium alloy with a coating tailor-made to the architect’s specifications, defined in large part by the aerodynamic appearance of the terminal design. The result, as always, was an eminently practical roofing solution that catered perfectly to the ambition of the original design.