ROOFS RIGHT ON TARGET - sustainable green roofs brochure

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ROOFS RIGHT ON TARGET - sustainable green roofs brochure

ROOFS RIGHT ON TARGET - sustainable green roofs brochure

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  • 1. ROOFING ROOFS RIGHT ON TARGET Target sees a bull’s-eye with environmentally sustainable green roofs. Robert Kravitz T arget Corp. operates more than 1,400 stores worldwide and has a long history of being a respon- sible corporate neighbor. One way the mega-retailer has built this repu- tation is by pursuing several “green” initiatives. Starting as far back as the early 1970s, Target took several steps to construct its retail locations to be more efficient, use less energy, and Target has installed “green roofs” on four of its Chicago stores. A green roof requires the planting or placing of vegetation on top of a conventional roof. cost less to operate than other, similar extensive in-store recycling program retail facilities. at all locations. By the 1980s, Target began using a central, computerized energy-man- • Installing white membrane roofs agement system to help monitor and to help mitigate the urban “heat better control HVAC systems and island” effect and reduce energy energy use in its stores nationwide. costs. (Heat islands can amplify hot The plants are usually drought- Some of the company’s other green weather, especially in urban areas.) resistant and require minimal initiatives over the years include: maintenance and care. • Using motion-sensor lighting in • Developing and implementing an warehouses and stock rooms to turn Pub l i s hed i n PRO FESSI O NAL RETA IL S TO R E M A IN TE NA N C E • D E C E M B E R 2005 / JA N UA R Y 2006 • © 2006 France P ublications, Inc. • A tlanta, GA • 404-8 32 -82 62
  • 2. lights on and off automatically.• Developing a new type of light fix-ture for store lighting that uses onlythree lamps but produces the sameoutput as a four-lamp fixture.• Introducing low-flow fixtures intoall restrooms. Currently, the company is workingon two projects planned for certifica-tion under Leadership in Energy and ings for more than 30 years. The Target store utilize a modularEnvironmental Design (LEED) — and In Germany, for instance, schools, system of green roofs, whichis investigating other energy-saving office buildings, shopping centers and means soil and plants areand sustainable projects, such as pho- retail stores have planted more than pre-planted at a nursery andtovoltaic panels and solar rooftops. 108 million square feet of green roofs placed into a series of modulesMost recently, Target has also been in recent years. In fact, it is now esti- made of recycled plastics.pursuing another green program on mated that 7% of all newly construct-four of its Chicago stores — the instal- ed flat roofs in Germany are green. In green roofs is actually more than 70lation of green roofs. Japan, regulations require that new years old. More of a garden roof than And, Target is not alone. Though construction projects in Tokyo larger a green roof, it is located atop Newjust beginning to garner greater popu- than 10,000 square feet have 20% of York’s Rockefeller Center, providinglarity and interest in the United the roof surface area devoted to green building occupants and visitors aStates, green roofs have been found spaces. refreshing escape into an urban oasis.on the top of many European build- In North America, one of the first Meanwhile, Chicago and Toronto are today defining themselves as leadersP ubl i shed i n PRO FESSI O NAL RETA IL S TO R E M A IN TE NA N C E • D E C E M B E R 2005 / JA N UA R Y 2006 • © 2006 France P ublications, Inc. • A tlanta, GA • 404-8 32 -82 62
  • 3. in promoting green roofing projects. green roofing systems: their environmental and economicWHAT MAKES A ROOF GREEN? • Intensive green roofs are similar to benefits. Rarely open to the public, A “green” roof requires the plant- a roof garden, such as atop these roofs require less soil and main-ing or placing of vegetation on top of Rockefeller Center. This type of roof tenance. In fact, they tend to havea facility’s conventional roof. requires regular maintenance, just limited accessibility and require onlyDepending on the type of green roof like any garden, and is usually a pub- basic care.installed, the plants are usually lic space, with trees, shrubs and otherdrought-resistant. And, because of its landscaping. There also are two types of greengeographical location, the entire roofs: (1) one that is built right on thegreen roof often requires minimal • Extensive green roofs, similar to roof by landscapers and maintenanceattention. those found on the Chicago Target workers who haul the soil, plants and There are two separate categories of stores, are installed principally for materials up to the top of the build- ing; and (2) a modular system, like those installed atop the Target stores. In a modular system, soil and plants are pre-planted at a nursery and placed into a series of modules made of recycled plastics. The mod- ules are then hoisted to the top of the building, where they are installed on the roof. “The modules are 2-by-4-foot plas- tic flats supporting a Sedum variety of ground cover in 4-inch-deep grow- ing medium,” says Forrest Russell of Target’s real estate department and overseer of the Chicago stores. “The plants are highly drought-tolerant and require only rare applications of water. Actual time spent servicing the growing plants has been negligible.” According to Russell, the installa- tion of a modular system is simple. “The planted flats are lifted by crane to the rooftop and arranged on a filter fabric set directly on the roof mem- brane surface,” he says. “No impact to the membrane roof has arisen, and if the roof should need repair, the flats can be moved, the roof is serv- iced, and the flats put back in place.” Studies indicate that the modular system tends to be more cost-compet- itive because the planting and prepa- ration work is performed in an assem- bly-line fashion at the nursery. The modular system also allows the roof to be installed significantly faster than a “built-in-place” system, and there is less danger to landscapers working atop high buildings. BENEFITS OF GOING GREEN Because the green roofs on the Chicago Target stores are brand-new, Russell says it is too early to calculatePub l i s hed i n PRO FESSI O NAL RETA IL S TO R E M A IN TE NA N C E • D E C E M B E R 2005 / JA N UA R Y 2006 • © 2006 France P ublications, Inc. • A tlanta, GA • 404-8 32 -82 62
  • 4. the payback on the investment. respond appropriately with greenHowever, some of the benefits the roofs and other programs.” PRSMcompany is anticipating have been ROBERT KRAVITZ, FORMER OWNERfound on other facilities where green OF THREE CONTRACT CLEANINGroofs have been installed, including COMPANIES, NOW WORKS AS Areduced storm water runoff. * Source: “Green Roofs: An Eco Approach to MARKETING CONSULTANT TO After a storm, as much as 75% of Cooling Down the City,” by Kent Swanson, ORGANIZATIONS IN THErainwater becomes runoff. As this EarthToys E-Magazine, 2002. CLEANING INDUSTRY.water washes off roofs and streets, itpicks up contaminants, which caneventually make their way to riversand lakes. Large quantities of wateralso stress the storm drainage systemsof many cities. A green roof can put this water tobeneficial use. A report by TempleUniversity in Philadelphia suggeststhat as much as 75% of the waterreceived by a green roof is used by theplants and soil, with only about 25%released as runoff. Additionally, therunoff is released gradually, whichmakes it easier to control and con-tain. Many facilities are also discoveringthat green roofs can reduce energycosts significantly. According to aNew York Times article, when temper-atures climb to more than 90 degreesFahrenheit, a building’s roof canreach temperatures of 175 degrees.The article indicated that with agreen roof, roof temperatures stay atabout 77 degrees. The lowered tem-perature can reduce temperaturesinside the building, lesseningdemands for air conditioning. By“greening” the roof of Chicago’s CityHall, for example, city officialsbelieve more than $4,000 a year willbe saved just on air-conditioningcosts.* The increased number of greenroofing projects throughout theworld is a promising sign. It indicatesthat we have realized the importanceof replacing the green spaces lost toour rapidly urbanizing society, whilefostering a healthier, more sustain-able environment. It’s also reassuringto see major corporations and retail-ers, such as Target, leading the way inthis effort. “The mayor of Chicago envisionsthis city as the ‘greenest city inAmerica,’” says Russell. “Target willPub l i s hed i n PRO FESSI O NAL RETA IL S TO R E M A IN TE NA N C E • D E C E M B E R 2005 / JA N UA R Y 2006 • © 2006 France P ublications, Inc. • A tlanta, GA • 404-832 -82 62