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Frameless glass rail adds to an open-air experience at the Aer bar in Mumbai

The strength, stiffness and clarity of DuPont™ SentryGlas® contribute to a stunning view that draws locals and visitors alike.

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 Four Seasons Aer Bar in Mumbai
Photo courtesy of Four Seasons Hotels Limited
"You feel as though you have been transported to a different place. All you can see is the sea and the lights of Mumbai spread out like a blanket beneath you,” says Aer bar manager Aditya Ramani.

Four Seasons Aer Bar in Mumbai
Photo courtesy of Four Seasons Hotels Limited
The glass rail's frameless design relies on the strength of the glass itself to carry wind and impact loads, aided by the stiffness and strength of DuPont™ SentryGlas® structural interlayer.

Four Seasons Aer Bar in Mumbai
Photo courtesy of Four Seasons Hotels Limited
Locals and visitors agree that the Four Seasons Aer bar is one of the best spots to be as evening and nighttime transform the views of Mumbai.

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Perched 34 stories up in the air, the Aer bar and lounge atop the Four Seasons Worli in Mumbai, India, is becoming a popular destination for tourists and locals alike. It's the city's highest rooftop bar, commanding spectacular views of the sea and the cityscape below.

"You feel as though you have been transported to a different place. All you can see is the sea and the lights of Mumbai spread out like a blanket beneath you,” says Aer bar manager Aditya Ramani.

The upscale casual design motif features chic, minimalistic furnishings that create a perfect place and to sit and relax with friends or mix in with a melting pot of international hotel guests. Many come to watch the sunset, and experience the city's slow drift into night, its buildings illuminated from inside, its vibrant street life twinkling below. If that's not enough to help you feel "on top of the world," there's a frequent reminder as new guests arrive at the Aer bar, take in the stunning 360-degree panorama, and say "Wow!"

Even the locals are impressed. "Living here for 25 years, this was the first time I saw such a transformation on such a grand scale. The city lit up slowly and if the view during sunset wasn’t pretty enough, with the lights on, the city looked beautiful, almost sexy," says local food and travel blogger Nishant Singh.

Glass design accents the view

One of the keys to experiencing the open-air feeling and breathtaking views that the Aer bar offers, is the designer's choice of safety glazing in the balustrade surrounding the lounge. Located at the edge of the rooftop, the glazing creates an almost invisible protective layer between guests and the wow-factor they experience gazing out and onto the city below.

Safety glass was a must, of course ... but the designer wanted an unimposing and highly transparent glass wall, that virtually disappears from view. For this effect, they chose a frameless design, relying on the strength of the glass itself, to carry wind and impact loads. Laminated safety glass made with DuPont™ SentryGlas® structural interlayer fit the need perfectly.

China Southern Glass laminated the glass balustrade panels, each measuring 1.7 meters by 2.3 meters. The panels are line-supported at their foot. Each laminate consists of two 12-mm glass panes, laminated together using a 3-mm interlayer of SentryGlas®. The glass was installed by Permasteelisa, a multinational specialist in advanced architectural glazing.

SentryGlas® safety interlayer contributes to strength and clarity

Among the advantages of using a SentryGlas® interlayer in minimally framed balustrade laminates is the material's higher stiffness and toughness compared with traditional safety interlayers. Even if a glass panel gets broken, the stiff SentryGlas® interlayer helps keep the self-supported panel in place until it can be replaced. Traditional interlayers are floppy and can cause a glass balustrade to fall over after breaking, which can create a dangerous gap in rooftop protection and a possible hazard below.

SentryGlas® is also exceptionally clear, which helps keep the view more natural and open. And, unlike traditional interlayers, SentryGlas® is more resistant to moisture instrusion at the edges, which helped the Aer bar design avoid any need for metal capping or edge-protecting of the laminates. The panels span clear from edge to edge, and across the top as well, for a perfectly engineered view.

The Four Seasons Worli is not shy about promoting its rootop attraction: "Marvel at the panoramic city and sea views and the endless ceiling of sky and stars," says their marketing material for the Aer bar. “It takes your breath away,” explains Aer’s Manager, Aditya Ramani.

Travel writers are crediting the Four Seasons Aer bar as one of the best spots to visit in Mumbai to see the sunset, and a crucial piece of the puzzle in Mumbai's pitch to be the most entertaining city in Asia in the coming decade.