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	Green roof - Wikipedia, the free encyclopedia
		A green roof is a roof of a building that is partially or completely covered with vegetation and soil, or a growing medium, planted over a waterproofing membrane.
		Green roofs are becoming common in Chicago, as well as Atlanta, Portland, and other cities, where regulations to combat the urban heat island encourage their use.
		The Chicago City Hall green roof is one of the earliest and most well known examples of green roofs in the United States; it was planted as an experiment to determine the effects a green roof would have on the microclimate of the roof.
	en.wikipedia.org /wiki/Green_roof (1801 words)

	Chicago City Hall Green Roof
		Green roof technology is so new to America, that there is far too little data published to guide landscape architects in the design process.
		The primary purpose of the City Hall Green Roof Pilot Project is to provide a green roof demonstration that serves to facilitate research and educational outreach within the context of a midwestern climate.
		Though green roofs are typically planted with only sedums and low grasses, the planting palette has been expanded significantly to accommodate research related to the viability of over 100 species of plants.
	www.asla.org /meetings/awards/awds02/chicagocityhall.html (847 words)

	Green Roof
		Green roofs consist of plants being grown on roofs, thus replacing the vegetated footprint that was destroyed when the building was constructed.
		The highest density of green roofs occurs in Germany, widely considered a leader in green roof research, technology and usage, where it is estimated that 10% of all flat roofs are green.
		Intensive green roofs use a wide variety of plant species that may include trees and shrubs, require deeper substrate layers, are generally limited to flat roofs, require ‘intense’ maintenance, and are often park-like areas accessible to the general public.
	www.hrt.msu.edu /faculty/Rowe/Green_roof.htm (822 words)

	Green Roof
		Green roofs are emerging as a very effective means of addressing many of the environmental concerns that exist in today’s urban centers.
		The decision to use an extensive green roof system as opposed to an intensive green roof is based upon the use of the existing surface available on Steinman Hall.
		Extensive green roofs, like the section we are building are far more cost effective at least initially and no additional structural support is required in the installation of the green roof.
	www.ccny.cuny.edu /social_science/Kfoster/eep/people/greenroof.htm (1007 words)

	Green Roof Research
		Intensive green roofs - or roof gardens - typically bring 2 to 4 feet of soil (although some have had as much as 15 feet of soil!) onto the rooftop, enabling you to grow on the roof almost anything that you could grow on the ground.
		Green roofs will be one of the ways that we enable our cities to maintain and improve the quality of the air and water within them while also improving the energy efficiency of the building upon which they exist.
		The majority of the extensive green roofs have focused on using sedums and stonecrops (plants in the Crassulaceae family) because of their remarkable ability to withstand moisture extremes.
	www.wildflower.org /?nd=green_roof (887 words)

	GREEN ROOF RESEARCH PROGRAM
		Green roofs involve growing plants on rooftops, thus replacing the vegetated footprint that was destroyed when the building was constructed.
		Intensive green roofs utilize a wide variety of plant species that may include trees and shrubs, require deeper substrate layers (usually > 10 cm (4 in)), are generally limited to flat roofs, require ‘intense’ maintenance, and are often park-like areas accessible to the general public.
		Three roof types were tested in the roof vegetation type study: an extensive green roof with vegetation, an extensive green roof with substrate only, and a conventional commercial roof with a 2 cm (0.8 in) deep gravel ballast.
	www.hrt.msu.edu /greenroof (4766 words)

	Penn State Green Roof Research: Research
		Roof membrane testing: The PSCFGRR is presently negotiating with a major manufacturer to begin evaluations of American roof membranes using the widely accepted German FLL membrane testing procedures.
		The green roofs are a modified layer system utilizing an Enkadrain drainage layer overlain with 4" of an expanded clay-based growing medium, and covered with PEPP (Porous Expanded Poly Propylene).
		Each green roof is fitted at each of 4 locations with 7 thermister sensors in a vertical array.
	hortweb.cas.psu.edu /research/greenroofcenter/research.html (1274 words)

	Green Roof Proposal
		By examining other green roofs and methods of utilizing this new technology, the goal is to begin communication pertaining to the establishment of a plan for Gladfelter Hall’s future green roof.
		Roofs were usually made of turf, and the thick walls of the structures contained bottom layers of stone followed by cut blocks of sod alternating with strips of thin turf.
		While green roofs are no substitute for open space and simply cannot replace the significant functions of forests, prairies and open parkland, they do provide green space and wildlife habitat from which both urban and suburban areas can greatly benefit. Green roofs also improve air quality.
	www.temple.edu /env-stud/seniorsem/section3C.htm (3745 words)

	NPR : 'Green' Roofs Sprout Up All Over
		But green roofs are being touted as the answer to a number of environmental problems -- and they're showing up all over the country.
		Green roofs are tools for dealing with stormwater runoff and reducing urban heat islands.
		Among the best-known green roofs are the ones atop Chicago's City Hall and a Ford Motor Co. facility in Dearborn, Mich. Some of the newer roofs making the news include a residential high-rise in New York City, a prairie-covered library in Evansville, Ind., and the top of the Multnomah County Building in Portland, Ore.
	www.npr.org /templates/story/story.php?storyId=1970286 (413 words)

	Penn State Green Roof Research: About Green Roofs
		Green Roofs are, as the name implies, plantings that are placed on the roof of a building.
		Between 1989 and 1999, German roofing companies installed nearly 350 million square feet of green roofs and the rate is increasing.
		Green Roofs have been installed in the US, in places such as Chicago City Hall, and more are planned, like Ford’s River Rouge renovation in Detroit.
	hortweb.cas.psu.edu /research/greenroofcenter/history.html (285 words)

	Greenroofs.com: The Resource Portal for Green Roofs
		Green roofs are steadily creeping into Canadian life: large buildings with the roof covered with grass and some-times cultivated gardens like those in Chicago where bees and butterflies thrive.
		Roofs of any kind are rarely on the mind of most home owners, and when they are, it is often because they need to install a new roof or repair an existing one—both of which are usually costly expenditures.
		Although small green roof undertakings may be easy do-it-yourself projects for the average weekend warrior, more extensive green roof systems can still be perceived as daunting in terms of buying the right materials, installing the layering, and including the important perimeter, flashing, and drainage outlet details.
	www.greenroofs.com (4320 words)

	Word Spy - green roof
		A roof that is covered with plants, particularly one in which special membranes and other layers serve to protect the rooftop and hold the plants and soil in place.
		Green roofs serve three major benefits to the city, said David Reynolds, first deputy commissioner for Chicago's Department of Environment.
		A green roof is also called a living roof (1993) or an eco-roof (1993).
	www.wordspy.com /words/greenroof.asp (411 words)

	[No title]
		The many ecological and aesthetic advantages to having a green roof include: Improving water quality-studies have shown that green roofs are highly effective at managing stormwater discharge from a roof, thereby protecting sensitive watersheds and potentially reducing costs of drainage basins and other stormwater management structures.
		Green roof applications are appropriate for residential, farm, industrial, and office buildings. They provide the greatest benefit in urban areas and in large industrial or commercial sites where impervious surfaces dominate.
		Extensive green roofs are characterized by the special growing medium which is a combination of light weight organic and inorganic materials.
	www.deq.state.mi.us /documents/deq-ess-p2-p2week-greenroofresources.doc (1885 words)

	Roof Systems - Green Roof systems EPDM rubber roofing material certified roofs contractors
		EPDM roofs are highly resistant to weathering, ozone, and surface damage.
		EPDM roofing is a perfect choice for low-slope roofs and flat roofs that need to be waterproof and durable against the elements.
		Further, because the roof panels are mounted on systems of sliding clips, they move freely with thermal expansion and contraction.
	www.ir-roof.com /roofsystems.htm (719 words)

	Green Roof Monitor
		Green Roofs for Healthy Cities' members and City of Toronto staff are moving forward with the implementation of both sites of the Green Roof Infrastructure Demonstration Project: the Eastview Neighbourhood Community Centre and a portion of the Podium Roof at Toronto City Hall.
		Green Roofs for Healthy Cities is currently overseeing a research effort with a group of senior Urban and Regional Planning students at Ryerson Polytechnic University.
		Various greening strategies will be assessed for their relevance to five broad project objectives: improving indoor and outdoor comfort levels for residents; reducing energy demand for heating and cooling; reducing the quantity and increasing the quality of stormwater run-off; conserving indigenous biodiversity (genetic, species and ecoystems); and encouraging environmentally responsive design strategies in the City.
	www.cityfarmer.org /GreenRoof.html (7024 words)

	Inhabitat (Site not responding. Last check: 2007-10-22)
		Green roofs add so many benefits to a building and its surrounding area, it’s astonishing that more roofs aren't green at this point.
		The biggest hurdle to getting green roofs going in more places, is convincing getting city governments to change their policies and adopt programs which provide incentives to property owners to renovate their roofs.
		Frustratingly, another hurdle to green roof world-domination is the fact that ever since the "back-to-the-earth" straw bale movement of the seventies, green roofs have been associated with a sloppy, crunchy aesthetic.
	www.inhabitat.com /entry_748.php (1059 words)

	ASLA -- Green Roof Project
		ASLA green roof is cited as a high-profile example of green roofs in other cities.
		The AP looks at global trends in green roof technology noting that, "The planted rooftop of the American Society of Landscape Architects building in downtown Washington is a model of the techniques used increasingly to cool temperatures, filter air, and lessen the burden on sewers by absorbing rainwater.
		CDF, which designed and implemented the green roof for the Chicago City Hall, is consulting on the ASLA project for the lead firm Michael Van Valkenburgh and Associates.
	www.asla.org /land/050205/greenroofcentral.html (1538 words)

	Green Roof Links
		DC Greenworks is a green roof, Low Impact Development (LID), and environmental restoration service company run by a non-profit that trains and employs at-risk young adults in the skills necessary to meet the growing demand for these new, technical environmental services.
		Green Roof Center to demonstrate and promote green roof research, education, and technology transfer in the Northeastern US.
		She has been involved in the designs of several green roofs, including one extensive green roof with a slope of 45%.
	www.greenroofplants.com /green_roof_links.htm (2252 words)

	Treehugger: Green Roofs: A primer
		We write a lot about green roofs, and when invited to help in the installation of one, we couldn't say no and call ourselves treehuggers.
		The challenge in the design of a green roof is to keep the water flowing.
		We have written before how green roofs are wonderful- they absorb CO2, eliminate heat island effects in cities, keep you cool in summer and just look great.
	www.treehugger.com /files/2005/09/green_roofs_a_p.php (901 words)

	Green Roofs for Healthy Cities - Home
		We are planting the green roof on Friday and Saturday (August 25th and 26th).
		The growth media engineered for Green roof systems must provide the nutrients necessary for the vegetation to survive and thrive in all types of climates and conditions.
		Also known as a green roof, a living roof is covered either partially or completely with vegetation and soil.
	www.greenroofs.net /index.php (1363 words)

	The International Green Roof Association - Global Networking for Green Roofs
		The basic idea of IGRA is the support of the Green Roof market on an international level by sharing knowledge and experiences in the field of Green Roof technology and public relations.
		IGRA´s international Green Roof platform facilitates the exchange of experiences among the members of the network.
		IGRA is an international Green Roof network, whose members promote and support the ecological Green Roof idea in their home countries.
	www.igra-world.com (393 words)

	Green Roof Chicago Tour
		Chicago Green Tech’s roof is a combination of green roof, white reflective roof, and solar panels.
		The green roof is planted in a growing medium made of shale, clay, and recycled sludge waste.
		The Center for Green Technology has six Green Roof test plots demonstrating different green systems and comparing them to a fl roof, a white reflective roof, and a gravel roof.
	www.madisonenvironmental.com /events_greenrooftour.html (326 words)

	earth pledge green roofs initiative (Site not responding. Last check: 2007-10-22)
		The Earth Pledge Green Roofs Initiative supports the development of green, vegetated rooftops in urban areas to prevent stormwater runoff pollution, lower urban temperatures, and improve air quality.
		Widespread green roof development in New York and other cities will also provide an array of economic, aesthetic, and social benefits to city dwellers.
		Research: To provide policy-relevant scientific data on green roof technical performance, Earth Pledge conducts theoretical and experimental research to investigate impacts, costs and benefits of building and regional green roof construction.
	www.earthpledge.org /GreenRoof.html (212 words)

	Earthtoys - Emagazine
		GREENING AFFORDABLE HOUSING - The green building techniques used by HEB are not radical, and should be accessible to any builder.
		The idea of this emagazine is to give those of you with some knowledge on the subjects of green building or alternate energy systems and technology a chance to share your knowledge and experience.
		To submit your article for the next issue all you need to do is send an email to news@earthtoys.com with a short description of what you'd like to write about.
	earthtoys.com /emagazine.php?issue_number=05.10.01&article=greenroofs (476 words)

	Green House Roof Information \| Green House Roof Portal (Site not responding. Last check: 2007-10-22)
		Because the weight of an extensive green roof is comparable to other roofing.
		Green house and emory knoll farm, have been providing horticultural excellence for over fifty years.
		The film desing of the green house roof and walls and the possibility of its lowering.
	www.greenhouse-resource.info /green-house-roof.html (1073 words)

	Roofscapes, Inc.: Green roof system design and installation (Site not responding. Last check: 2007-10-22)
		We are an engineering firm dedicated to developing the most elegant and efficient performance-based green roofs.
		Our green roofs are our billboards; we guaranty quality installations, and we stand behind our green roofs long after they’re built.
		Award-winning green roofs backed by the best customer service and expertise in the business.
	www.roofmeadow.com /index.shtml (175 words)

	Green roofs for garden buildings
		When you install any garden building you will probably remove foliage, be it grass, borders or even weeds, you could replace the lost environment with a green roof on your garden building helping to maintain the balance.
		Instead of tiles or felt we are offering as an option a green roof for your shed, log cabin, playhouse or summerhouse, in fact any building you require.
		The sedum green plants can help minimise the damage done to our environment, this system is used throughout the country and can be found on many green roof buildings.
	www.taylorsgardenbuildings.co.uk /store/customer/pages.php?pageid=77 (526 words)

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