A Missed Opportunity in Bangalore's NeoTown

With a booming economy and population, Bangalore suffers from high air pollution and a lack of clean drinking water. So, why did Andy Fisher Workshop (AFW) design NeoTown with no green roofs? Who knows?

As reported in World Architecture News, NeoTown is supposed to be, "...a blueprint for future sustainable developments by Patel Realty." According to the photos provided by AFW, NeoTown is a vast expanse of flat roofs, with not a single piece of green to be found.

I am particularly critical given the that AFW has incorporated gardens before, in India, and for Patel Reality's sister company, Patel Engineering. Specifically, in Mumbai, "...High level link gardens and a rooftop nursery connect the horizontal towers and strengthen the buildings green credentials towards gaining a LEED Gold rating." Hat tip to Architectural Buzz.

While it is easy to sit back and criticise, a project of this manageable (50 hectare) size would be a perfect display of green roofs and would greatly further the design's goal of water conservation. Should anybody from AFW be reading this post, green roofs greatly reduce fine particulate matter air pollution, storm water runoff, as well as reducing HVAC costs by approximately 25-30%. Perhaps AFW can go back and add green roofs to this otherwise fine piece of urban design.

Hyderabad's Greenest Roof

Many of the green roof projects I have written about are designs that haven't been completed, like Dongtan in China and
the Eco Bay Complex in Abu Dhabi.

However, the CII-Sohrabji Godrej Green Business Centre (GBC) opened in Hyderabad, India in 2004! I found a press release at the Indian Brand Equity website discussing the opening of the project.

At the time of its opening, it was the only LEED Platinum building outside of the US.

One of the key aspects of the building is its zero discharge of water. In India, where clean water is not readily available and the monsoon season overwhelms the limited water treatment facilities, the ability to capture and recycle all water is exceptionally significant. Additionally, the green roof helps reduce the cost of air conditioning, desperately needed in such a hot climate.

Other elements of green building used for the GBC include the use of recycled materials, such as fly ash, as well as photovoltaic cells for solar energy.

This project received funding support from the US taxpayers in the form of a matching grant of $1.2 million over three years.

According to the US Embassy in New Dehli, "The grant will assist the centre as it develops detailed plans for each major area, including green buildings, green business incubation, and water and energy conservation."

India has demonstrated its desire and capacity to build green buildings. Let's hope to see more green roofs like the Chennai Airport and the GBC in the future!

Not Just Any Green Roof

What interesting times we live in! I read an article in "The Economic Times," an Indian newspaper, titled "Green Roofs differ in Capacity to Cool Interiors." It discusses the green roof studies going on a the University of Texas.

At UT, there is the Lady Bird Johnson Wildflower Center that is hosting how different types of roofs impact temperature inside structures. In particular, they have built several identical steel structures and put different kinds of roofs on them and are measuring the temperatures and water retention.

Studies are clearly indicating that green roofs definitely reduce internal temperatures. From the article:

"During one 91-degree day, ... a black topped box without air conditioning reached 129º inside. Meanwhile, the green roof replicas produced indoor temperatures of 97 to 100 degrees F. "That's a huge difference to have a 20-or-so degree temperature drop," Simmons said, noting that green roofs' ... are also believed to double the lifespan of roofing material. "

However, in places like India and Texas, where flash flooding and storm water runoff are serious issues, different green roof materials perform better than others. Again, from the article, "Yet this feature varied the most among the six manufacturers. The better green roofs retained all of the water during a half-an-inch rainfall, and just under half the water when two inches of rain fell. "

Let's hope that the studies at UT, combined with the innovation in synthetic soil by Suntory, will spread the acceptance and use of green roofs world wide, as their ability to reduce air pollution and storm water runoff make a real difference!

Green Roofs Help India

Without a doubt, India is one of the fastest growing economies and populations in the world. However, India suffers many of the same problems as the rest of the developing world, namely, air pollution, a shortage of regular power, as well as storm water management issues.

To help combat these problems and provide a better life for all Indians, green roofs are beginning to appear. In an article found on India Together, the author spells out how the building boom in India mirrors Western, upscale properties. He also mentions that all of the luxury amenities in these buildings consume more and more power. Not to be left behind government buildings are also energy hogs.

This is where green building and green roofs come in. Green roofs will help reduce cooling costs for the new buildings by about 20%. Additionally, less strain will be put on the water system by the effective storm water runoff management that the green roofs supply. Were that not enough, the green roofs will also help filter fine particulate matter air pollution out of the air, making the area more livable.

Green roofs are a cost effective solution to many of India's, and the developing world's problems. As the word spreads that green buildings produce great benefits, hopefully, more countries will have them.

India Uses Green Roof at New Chennai Airport

India, with its ever growing population and expanding economy is no stranger to air pollution.

In its many great cities, the air is heavy with fine particulate matter and the storm water runoff is polluted. However, flat green roof technology is being used to help remedy these issues!

For its new airport in Chennai, their will be several green features, including a very large indoor garden.

Additionally, according to Architectural Record,

"A parking garage with a green roof will create what the designers describe as a “green gate” to the terminal. “The folding geometry of the green roof captures and directs rain water during the rain season to the elliptical openings in the roof, creating shimmering ‘rain curtains’ as the water falls through the garage to cisterns below. This stored water is later used during the dry season to irrigate the green roof and maximize the site’s sustainable resources.”

This is certainly a good thing for the city of Chennai, as well as the air around the airport. Flat green roofs will improve the aesthetic of the city, as well as the quality of the air.