Commercial Industrial Roofing's energy efficient options can help make your facility more earth friendly. We are concerned about the environmental impact of our materials and roof systems.
A green roof, or roof top garden, is a vegetative layer grown on a rooftop. Green roofs provide shade and remove heat from the air through evapotranspiration, reducing temperatures of the roof surface and the surrounding air. On hot summer days, the surface temperature of a green roof can be cooler than the air temperature, whereas the surface of a conventional rooftop can be up to 90°F (50°C) warmer.
Green roofs can be installed on a wide range of buildings, from industrial facilities to private residences. They can be as simple as a 2-inch covering of hardy groundcover or as complex as a fully accessible park complete with trees. Green roofs are becoming popular in the United States, with roughly 8.5 million square feet installed or in progress as of June 2008.
Benefits and Costs
In addition to mitigating urban heat islands, the benefits of green roofs include:
Reduced energy use: Green roofs absorb heat and act as insulators for buildings, reducing energy needed to provide cooling and heating.
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Knowledge is KEY to selecting the correct roof system for your facility.
Commercial Industrial Roofing's expertise with commercial and industrial roofing allows us to help you choose the appropriate roof solutions for your facilities. We have the ability and experience to furnish and install each of the primary roof systems.
THERMOPLASTIC (PVC, TPO and Fleece Back) Roofing
Lightweight, reinforced, highly reflective, light colored membrane. Highly resistant to chemical atmospheres, ozone, ultraviolet light, tears and extreme weather conditions. Exhibits excellent fire resistance and seam strength due to heat welding.
Lightweight, synthetic elastomer material. Resilient, tensile strength, elongation, resistant to ozone, ultraviolet light and ponding water.
SPRAYED POLYURETHANE FOAM
Sprayed on the roof as a liquid and adheres to most any properly prepared substrate. Dries quickly and forms a seamless monolithic waterproof barrier that can add both insulation and provide drain characteristics. Can provide for increased reflectivity, fire resistance, and various other attributes.
Coatings are used for roof surfacing, maintenance or repair, weatherability, reflectivity, ultraviolet light protection or aesthetics to enhance the performance of the installed roof system.
MODIFIED BITUMEN & BUILT-UP ROOFING
Modified Bitumen: Composed of either asphalt reinforced with polyester or fiberglass and, in some cases, with factory-applied surfacing. Installed typically in multiple layers, resistant to heavy traffic, puncture and tears.
Built-Up: Multiple layers of felts, fabrics or mats saturated with bitumen installed rooftop. Can be surfaced with gravel, mineral cap sheets or smooth weather resistant coatings. Ideal for resisting mechanical damage.
Architectural and structural systems utilizing galvanized steel or aluminum. Custom panel sizes, profiles, colors and finished coatings are available. Long-term weatherability, low maintenance and aesthetic value.
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What wildly underfunded climate solution can achieve all of these goals simultaneously:
Slow global warming by increasing the reflectivity of the Earth (geo-engineering)
Reduce local temperatures in the hottest cities (adaptation)
Reduce fossil CO2 emissions (mitigation)
Save U. S. consumers and businesses billions of dollars in energy costs
Reduce urban smog and hence cardio-pulmonary disease
Create more than 100, 000 jobs in two years?
The answer is a major effort to make roofs (and pavements) whiter and/or more reflective, which should be coupled with a major urban tree-planting effort.
This urban heat island mitigation (UHIM) may well be the single most cost-effective energy and climate strategy (see background here plus White roofs are the trillion-dollar solution) .
Now Energy Secretary Steven Chu has announced new initiatives to promote and install ï¿½cool roofsï¿½ on DOE and other federal buildings. CAPï¿½s Laurel Hunt has the story.
The release of the DOE cool roofs initiatives is important step towards President Obamaï¿½s vision of greening the federal government as outlined in his Executive Order on Sustainability (E. O. 13514) , which commits the federal government to reducing its greenhouse gas emissions by 28 percent by 2020. Just yesterday, President Obama announced the expansion of the GHG emission reductions listed in E. O. 13514 by calling for an additional 13% reduction in GHG emissions from indirect sources by 2020.
Cool roofs, which improve building efficiency by reducing cooling costs and offsetting carbon emissions, will necessarily play an essential role in achieving that goal. Cool roofs effectively reduce heat by using lighter-colored roofing surfaces or special coatings to reflect more of the sunï¿½s heat. A study conducted by Lawrence Berkeley National Laboratory and the Davis Energy Group found that installing a cool roof reduced the daily peak roof surface temperature of each building and could reduce energy use expended to operate cooling equipment up to 52%.
In a memo released June 1, 2010, Secretary Chu extolled the many virtues of cool roofs:
Cool roofs are one of the quickest and lowest cost ways we can reduce our global carbon emissions and begin the hard work of slowing climate change. By demonstrating the benefits of cool roofs on our facilities, the federal government can lead the nation toward more sustainable building practices, while reducing the federal carbon footprint and saving money for taxpayers.
Secretary Chu's leadership on the cool roofs initiative is a critical step in reducing the nation's greenhouse gas emissions buildings account for 40% of U. S. energy use and about 35% of the nation's greenhouse gas emissions. Implementing strategies like cool roofs, roads, and pavement throughout the nation could become the equivalent of taking every car in the world off the road for 11 years. Researchers also found that.
Implementing cool roofs and cool pavements in cities around the world can not only help cities stay cooler, they can also cool the world, with the potential of canceling the heating effect of up to two years of worldwide carbon dioxide emissions.
Furthermore, installing cool roofs effectively helps combat the urban heat island effect increased warming of urban areas in comparison to rural surrounding rural areas, caused in part by the combined heat of numerous hot roofs. Reducing the urban heat island effect will both improve air quality and lower ambient air temperature.
Specifically, Secretary Chu instructed that all DOE offices to install cool roofs, whenever cost effective over the lifetime of the roof, when constructing new roofs or replacing old ones at DOE facilities. DOE also released a new resource on the roof selection process, Guidelines for Selecting Cool Roofs. Secretary Chu also announced Monday new international cool roof opportunities to provide technical support to partnering nations, as well as a ramp up of the Roof Asset Management Program (RAMP) for roof retrofitting, which currently saves around $500, 000 a year within the DOE agency that houses it; it is expected to save $10 million over the next 15 years.
Other cool roof projects are proliferating throughout the nation, too. These range from the Donald Bren School of Environmental Science & Management, a two time LEED certified platinum building at UC Santa Barbara, to the McDonald's Restaurant at Abercorn Common in Savannah, Georgia. A UCSB spokesperson at UCSB states that although greening the building initially added to costs, it's safe to say the building is quickly recovering the additional costs, saving the University money.
These projects and many others nationwide demonstrate that cool roofs are cool for the planet as well as the wallet. Cool roofs are yet another example of a currently available, low cost technology that can make a huge economic and environmental difference now. Even as the Senate debates a comprehensive clean energy and climate bill, which would spur further clean energy investments and energy savings, this low hanging fruit must be aggressively harvested.
See also Get Energy Smart Now here.