Category:

Green Roofs / Buildings

EARTH DAY #50 AND GREENER BUILDINGS: “The ones who caught on the fastest to what we were doing were the business leaders – the CEOs, the CFOs and the building owners,” stated Mary Tod Winchester, retired Vice-President for Administration, Chesapeake Bay Foundation, when reflecting on the value green building has delivered for people and the planet


“CEOs, CFOs and building owners were obviously looking at the bottom line and not necessarily what it would cost them, but what the operating costs were going to be. They talked with staff and quickly realized it was a place people wanted to work and loved to work. They really picked up on so many pieces of the puzzle. They would go on and incorporate what they saw into their own office buildings or new builds. And when you have businesses doing that you move markets.” reflected Mary Tod Winchester.

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Reinventing the Traditional Vegetated Roof for Detention – an application of whole-system thinking


“Green infrastructure focuses on cost-effective, living, upstream solutions. And there is no-where farther up stream than the roof! Green infrastructure is so powerful because it harnesses the simple solutions of nature to provide primary and secondary benefits,” states Charlie Miller, one of the key people behind friction-detention technology. “By virtue of their huge surface area and their large lateral extent, green roofs change the hydrologic response of the roof surfaces that they cover.”

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HOW A VEGETATED GREEN ROOF CAN ACHIEVE MORE DETENTION: “A new technology involves replacing the traditional fast-draining drainage layer with a ‘friction’ or ‘detention’ layer to ensure that during large storms, runoff rates are lower than rainfall,” stated Sasha Aguilera (November 2019)


“Imagine a traditional vegetated roof of customary design. The vegetated roof acts like a sponge. However, when the sponge is wet, the entire system is designed to drain rapidly,” wrote Sasha Aguilera. “Though it is possible to achieve detention via increased distance to drain and reduction of the slope, those two changes are often impractical or impermissible. However, the introduction of friction to a vegetated roof system is possible; thus causing a temporary accumulation of water within the vegetated roof.”

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Historic Passing of the Climate Mobilization Act in New York City – Green Roofs Required on New Buildings (April 2019)


The Climate Mobilization Act is the largest single act to cut climate pollution of any city. In a densely packed metropolitan of over seven million residents, commercial and residential buildings are the largest source of emissions and sit at the center of the policy change. “My legislation will require green roofs to be installed on new residential and commercial buildings, making New York the largest city in the nation to pass such a law,” stated Rafael Espinal. “We’ve already seen the revolutionary benefits of green roofs in action thanks to places around the city.”

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MITIGATION OF CLIMATE CHANGE: Researchers at the University of Technology Sydney conclude that Australian cities are lagging behind in greening up their buildings


“We modelled what could be delivered in the City of Sydney and the City of Melbourne based on the measures taken in Singapore (which is voluntary-heavy), London (voluntary-light), Rotterdam (voluntary-medium) and Toronto (mandatory). We combined this with data on actual green building projects in 2017 in Sydney and Melbourne to show the potential increase of projects in each city based on the four policies,” stated Paul Brown.

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Green Infrastructure in the United Kingdom: “These are truly modern times, and we need truly modern water management solutions to keep up,” stated Dr. Jason Shingleton at the Infragreen Conference


“With water such a major global issue, it’s vital that we make use of every available opportunity to save, re-use and re-cycle water and, where we return it back to the ground, we do so in a managed way,” stated Dr Jason Shingleton. Hence, it is imperative that the design of infrastructure changes to become more environmentally friendly. He urged using Sustainable Urban Drainage Systems on the roofs of high-rise buildings to manage rainwater and reuse it to nourish the trees and vegetation planted on ‘green roofs’.

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Turn Cities into Gardens: This is why we should all be covering all our buildings with plants


“Design firm Arup just published a study on the benefits of plant-covered buildings – some of which are so green they look like they’ve been deserted by humans and are slowly being reclaimed by nature – and they found the benefits go way beyond just sucking up CO2 and looking pretty,” wrote David Nield. “The company’s engineers took a variety of measurements in five cities to see what impact extra greenery could have.”

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VIDEO: Mexico City’s Green Plan & Green Roofs


Tanya Müller García presents “Areas Verdes de la Ciudad de Mexico & Azoteas Naturada” – “Mexico City’s Green Plan & Green Roofs” providing a description of the Green Plan in Spanish with English subtitles. An Inventory of Green Areas of Mexico City is provided as well as inclusion for the first time of green roofs in the Cities Green Inventory. Tanya also presents some examples of green roofs in Mexico and future projects.

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Green City, Blue Waters: Roofs Going Green in Philadelphia


A green roof is more than just grass on top of a building. It is a rainwater capture and management system. “This should be viewed as a model of how to take a large building in a residential neighborhood, work with the neighbors to get a zoning variance, and then successfully redevelop it,” says Leo Addimando.

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Green Roofs for Healthy Cities Releases “Green Pages: 2014 Green Roof & Wall Industry Directory”


“Green Pages is the first comprehensive listing of Green Roof Professionals and corporate members and it will be a great resource to anyone looking for help with their green roof or wall project. Hard copy and digital issues provide numerous opportunities for widespread distribution in an industry that continues to receive double digit growth each year,” said Steven Peck.

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