The Premier Source for Integrated High-Performance Building www.EDCmag.com February 2011
environmental design + construction
Cool Roofing plus ALSO INSIDE: GBCI Explains Credential Maintenance
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CONTENTS
FEBRUARY 2011 VOLUME 14 NUMBER 2
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24
In This Issue 12
16
LEED Credential Maintenance Explained
Cool Roofing +plus
COOL ROOFING +plus
By Beth Holst
A special section highlighting some of the latest news, products and trends putting a feather in sustainable caps.
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Calling all present and future LEED Green Associates and LEED APs with specialty.
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COOL ROOFING +plus
22
COOL ROOFING +plus
Green Shipping
Room to Grow
The new FedEx Cargo Facility features a massive green roof at Chicago O’Hare International airport.
Rooftop vegetable gardens provide new opportunities in urban environments.
By Mark J. Frisch, AIA, LEED AP
By Anna Suardini, ASLA, GRP
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34
34 COOL ROOFING +plus
In Every Issue
Top-Down Sustainability
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WEB TOC
6
EDITOR’S NOTE
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NEW + NOTABLE
33
ADVERTISER’S INDEX
COOL ROOFING +plus
COOL ROOFING +plus
The Value of Solar
Cool Roofs 101
Design by Slinky?
New high-performance roofing at George School makes the grade.
Mixed-income development benefits from PV panels and highly reflective shingles.
Understanding the resources, codes and emerging technologies to specify the perfect cool roof for your next project.
Alexander Remizov designed the conceptual ‘Ark’ to provide housing as a response to possible catastrophic climate change.
By Mark Robinson
By Anthony J. Summers, LEED AP
By Jessica Clark, LEED AP, and Sherry Hao
By Derrick Teal
Newsline ONLINE PRODUCT PROFILES This month, ED+C is featuring profiles on some of today’s most sustainable products.
For breaking news, visit www.EDCmag.com or sign up online to receive the eNewsletter delivered right to your inbox. For current industry news from your phone, snap the mobile tag here.
S N A P I T
Get the free app for your phone at http://gettag.mobi
On the Cover: The Arlington Grove redevelopment in north St. Louis is a mixed-income development utilizing solar to help overcome some tough times. Rendering courtesy of KAI Design & Build. See page 26 for the full story.
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TOC
WEB
Online Only at www.EDCmag.com THIS MONTH’S WEB EXCLUSIVE FEATURES INCLUDE:
Nature Conservancy Leads by Example
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The Nature Conservancy draws lightly from the local energy grid and releases no water into overburdened storm sewers. The conservancy’s goal: LEED Platinum at reasonable cost.
Peace through Sustainable Design
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By Dan Young, AIA, LEED AP For many Catholic parishes today, sustainability is not just an architectural precept; it is a matter of social responsibility. St. Jerome Catholic achieved LEED Silver certification for the renovation of its 17,100-square-foot parish hall.
Solar Energy: How Sweet It Is
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By Nate Whigham The solar energy industry is in a “sweet spot” created by the combination of low material costs and relatively high financial incentives. This creates a unique opportunity for developers to increase the scope of their projects while adding significant value.
The Best Solution for Energy Cost Control? IMAGE COURTESY OF DEREK RATH.
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By Neil Skidell and Nicholas A. Giannasca Co-generation and tri-generation have become leading techniques for efficient onsite power generation resulting in reduced energy costs. The concept appears simple, but is this really the best solution to meaningful savings?
Stop costly air and water leaks UISPVHIUIFCVJMEJOHFOWFMPQF
2011 EXCELLENCE IN DESIGN AWARDS
It’s not too late to enter your green building project into ED+C’s Excellence in Design Award contest. Visit eid.edcmag.com for more information.
"JS8BUFS3FTJTUJWF#BSSJFS GPSTIFBUIJOHBOE$.6CBDLVQ t8JUITUBOETXFBUIFSGSPNUZQJDBMUPIVSSJDBOF t*EFBMGPSXJOEPXSFUSPGJUToOPNPSFMFBLT t$VUTOBUVSBMHBTDPTUTCZNPSFUIBO t$VUTFMFDUSJDBMDPTUTCZNPSFUIBO t$VUTUIFMPBEPO)7"$TZTUFNT t*NQSPWFTJOEPPSBJSRVBMJUZ t%FQSJWFTNPMEPGDPOEJUJPOTGPSMJGF t)FMQTFBSO-&&%QPJOUT
tXXXQSPTPDPDPN Reader Service No. 1 www.EDCmag.com/webcard
www.EDCmag.com
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EDITOR’S
NOTE A Big Editorial Mesh You might not have noticed, but each issue of ED+C comes with a particular theme. They could be project specific, like education or healthcare, or they could be topical, like this month’s focus on cool roofing, energy efficiency and codes. (If you have noticed, give yourself a pat on the back.) A lot of time is agonizingly spent ensuring the topics for each month mesh well together. While it’d be a lot easier to draw topics out of a hat, or a lot more fun to play “pin the topic on the issue,” certain sections just go better together. Take this month, for example. Nearly every single green rating system lays out how certain types of roofs can contribute to each system’s certification. Whether it’s commercial or residential, LEED or Green Globes, a section is set aside for roofing. One alternative form of energy, solar, is a big part of roofing, while numerous other types of roofing we cover can contribute to energy conservation. California, in particular, has some of the strictest codes in the nation. And as of January 1, 2011, those codes got a little more stringent when Part 11 of the California Building Standards Code in Title 24 of the California Code of Regulations (also known as the CALGreen Code) went into effect. Also going into effect last year was the way continuing education was handled by the USGBC. Among the changes was credential maintenance, or the continuing education completed by LEED Professionals to maintain current knowledge of green building practices and LEED. You can find out more about the GBCI’s Credential Maintenance Program on page 12.
Update Your Contacts If you aren’t a subscriber to our eNewsletters (which you can sign up for at www.EDCmag.com), then you might be wondering why the products guy is writing the Editor’s Note for a second month in a row. As you may have guessed, ED+C has gone through a bit of restructuring. While she still works with the editorial staff, Michelle Hucal has become associate publisher to be in better contact with the associations and green organizations ED+C works with to develop more expansive content for our readers. Story ideas and other editorial requests previously sent to Michelle should now be directed toward me, while our news and products will be handled by associate editor Laura Zielinski. What does this mean for you? Likely, just an increase in great editorial content from a variety of media forms. We all still share the same little section carved out of BNP Media’s Troy office, which is code for, “We’re still within shouting distance of one another.” We’re excited about the changes. It’s probably a bit much to ask you to be excited about our changes, but we expect you’ll start to share our excitement as the adjustments we’ve made become more apparent. Until next time, then, read on to see how easily this month’s editorial topics flow with one another. Cheers,
2401 W. Big Beaver, Suite 700 | Troy, MI 48084 | 248.362.3700 | www.EDCmag.com Group Publisher Diana Brown
[email protected] Phone: 248.244.6258 Fax: 248.244.3911
Associate Publisher Michelle Hucal, LEED AP
[email protected] Phone: 248.244.1280 Fax: 248.786.1394
Editor Derrick Teal
[email protected] Phone: 248.786.1645 Fax: 248.283.6560
Associate Editor Laura Zielinski
[email protected] Phone: 248.786.1680 Fax: 248.502.9016
National Sales Manager Karrie Laughlin
[email protected] Phone: 248.786.1657 Fax: 248.502.2065
List Rentals For postal information please contact Rob Liska at 800-223-2194 x726 or email him at
[email protected]
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Tree(s): 74 Solid waste: 6,427 lb Water: 50,804 gal Air emissions: 16,694 lb
PRODUCTION + ART
ADVERTISING + SALES National Sales Manager Chris Campbell
[email protected] Phone: 248.786.1693 Fax: 248.502.1097
Web Editor Stephanie Fujiwara
[email protected]
ED+C’s use of Rolland Enviro100 Print instead of virgin fibers paper reduced its ecological footprint by:
Reprint Sales Jill DeVries
[email protected] Phone: 248.244.1726 Fax: 248.244.3934
For email information please contact Shawn Kingston at 800-409-4443 x828 or email her at
[email protected]
Subscription Information Phone: 847.763.9534 Fax: 847.763.9538
[email protected]
Production Manager Jeff Bagwell
[email protected] Phone: 248.244.6481 Fax: 248.283.6589
Art Director Shannon Shortt
[email protected]
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NEW + NOTABLE
To request more information on these products, visit www.EDCmag.com/webcard and enter the corresponding reader service numbers.
1
Parking Structure LED Luminaire
Everbrite Lighting has launched the PSL125 LED, a parking structure luminaire featuring iDV (in-Direct View) technology in both a down light and down/up light version. The patent-pending technology was designed to take the light from just a few high-power LEDs and distribute it with optimal uniformity and minimal loss. Visibility is improved, helping contribute to vehicle and pedestrian traffic safety. LED fixtures offer an option for parking structure applications that would benefit from no warm-up time or mercury content. According to the company, this product line meets or exceeds Buy American requirements with the American Recovery and Reinvestment Act (ARRA). www.everbrite.com Everbrite Lighting | Reader Service No. 11
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High Temperature Blanket
CertainTeed Corporation has introduced High Temperature (HT) Blanket Insulation. Featuring a minimum of 60 percent recycled content and approved for applications up to 1,000 degrees Fahrenheit, CertainTeed’s HT Blanket can be applied directly to any hot surface and is designed to increase thermal and acoustical performance of industrial equipment, panel systems, pipe fittings, vessels, boilers and tanks, the company reports. HT Blanket is fire and moisture resistant and resists mold or bacterial growth. HT Blanket Insulation achieved ASTM C553 as a standard for mineral fiber thermal insulation and may help projects earn points for LEED certification. www.certainteed.com CertainTeed Corp. | Reader Service No. 10
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Aerogel Building Insulation
Cabot Corporation and Rockwool International A/S have taken advantage of the properties of granular aerogel to create a building insulation product. The Rockwool Aerowool material is a high-performance composite of aerogel and mineral wool. With its level of thermal performance and thin profile, the material may be helpful in applications where space is at a premium, providing equivalent performance to traditional materials at a reduced thickness, according to the company. Cabot’s aerogel is produced as hydrophobic particles that can be incorporated in a variety of composite forms. Each particle consists of more than 90 percent air, which severely inhibits heat transfer through the material. www.cabot-corp.com. Cabot Corporation | Reader Service No. 13
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Integrated Lighting and Shading Control
Lutron has introduced the Energi Savr Node for EcoSystem with shades. According to the company, the Energi Savr Node (ESN) is a simple, programmable, expandable module for controlling light and saving energy in any commercial space. Targeting the commercial construction and renovation markets, ESN modules can connect to wired or wireless occupancy/vacancy sensors, daylight sensors, wallstations and motorized shades for total light management. Users can realize up to a 60 percent decrease in lighting energy usage with dimming, occupancy sensing, daylighting and shade control. ESN for EcoSystem with shades works right out of the box. Settings can be adjusted from several handheld mobile devices. www.lutron.com Lutron Electronics, Co., Inc. | Reader Service No. 12
Escalator and Elevator BIM Software Models Schindler Elevator Corporation now provides customers with access to three-dimensional, real-time, dynamic building information modeling (BIM) software on its website. From this site, people can access links to create BIM 3D models for the Schindler 9300 AE escalator and 330A elevator for low-rise buildings. In addition, 3D models for the Schindler 7000 custom elevator for high-rise buildings can be produced with assistance from a company representative. Users can create “to scale” 3D elevator and escalator models which can be viewed from any angle, helping to identify any issues with the building interface or systems early on in the design phase, resulting in fewer errors or omissions. www.us.schindler.com. Schindler Elevator Corporation | Reader Service No. 14
One Step Sealing Compound DECK-O-SEAL ONE STEP is a single-component, non-sag, elastomeric, polysulfide-based sealing compound used for caulking joints in structures that are subject to movement caused by temperature changes. DECK-O-SEAL ONE STEP
provide ultraviolet protection that does not yellow or fade, will cure in all weather and temperature applications, and offer abrasion and chemical resistance for residential decks, patios, garage floors, swimming pools, industrial commercial flooring and food processing facilities. ASPART-X is a zero VOC, 100 percent solid, aliphatic, pure
is designed for glazing operations and sealing joints in concrete structures when an expansion joint is required or in high sloping and vertical applications. ONE STEP is also designed for use in swimming pools above the waterline, where the tile meets the pool coping. It bonds well to concrete, masonry, glass, metal and wood. ONE STEP may help contribute to LEED credits for low-emitting or regional materials. www.wrmeadows.com W.R. Meadows | Reader Service No. 15
UV Protective Coating LINE-X Protective Coatings has introduced ASPART-X U/V Protective Coatings. According to the company, ASPART-X Coatings
polyurea coating specifically engineered as a topcoat with minimal environmental impact for polyurea and polyurethane systems. ASPART-X topcoat is a sealer intended to protect against impact, abrasion and chemical damage. www.aspart-x.com LINE-X | Reader Service No. 16
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New Standards for Sustainablility?
NEW + NOTABLE Eco-friendly Construction Adhesives and Sealants
Alamosa School District – Alamosa, CO Two schools – 145,000 sq. ft. 11,000 13" and 15" Reward ICFs used Energy models show 72% reduction in heating costs
Photo Courtesy of The Neenan Company
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Franklin International’s Titebond GREENchoice line of eco-friendly construction adhesives and sealants developed for the professional contractor is designed to allow nearly any bonding job on the construction site. The GREENchoice line includes seven solvent-free adhesives and sealants and one eco-safe polyruthethane formula that works inside and out and can be extruded in near-freezing temperatures. Most GREENchoice adhesives currently are available in professional-sized 29-ounce and 10.5 ounce cartridges. Additionally, the corrugated portion of the GREENchoice cartridge is constructed of post-consumer recycled material. www.titebondgreenchoice.com Franklin International | Reader Service No. 17
Formaldehyde-Free Formulated Insulation EcoTouch Pink Fiberglas Insulation with PureFiber Technology is made with natural materials and a formaldehyde-free formulation. This product uses a minimum of 50 percent recycled content (30 percent post-consumer recycled content). It is designed to provide energy efficiency and comfort with the environment in mind. According to the company, EcoTouch is fast and easy to install, helping reduce build-cycle time, enhance profitability and improve cash flow. EcoTouch Pink Fiberglas is GREENGUARD Indoor Air Quality Certified, as well as GREENGUARD Children and Schools Certified, to meet certification standards for indoor air quality. www.owenscorning.com Owens Corning | Reader Service No. 18
Ceramic Metal Halide Tubular Lamp EYE Lighting International has extended its Ceramic Metal Halide lamp product line to include a new tubular 150W model. The lamp, which has a mogul base, is up to 50 percent more energy efficient than common 250W probe start metal halide lamps, according to the company. The lamp is designed to perform in all mounting positions and has a 24,000 hour life when operating in the horizontal position. It delivers 3700K white light at 75CRI. Maintained lumens are 40 percent higher than typical ceramic or quartz metal halide lamps, the company states. The lamp operates on standard 150W metal halide pulse start ballasts. A special coating blocks 90 percent of UV radiation. www.eyelighting.com EYE Lighting International | Reader Service No. 20
ICF Concrete Cores are available in 4", 6", 8", 10" or 12" widths.
BIM and Energy Simulation Software
Full CAD details, BIM objects, and specs are available online.
1-800-468-6344 www.rewardwalls.com Reader Service No. 3 www.EDCmag.com/webcard
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Bentley Tas Simulator V8i is designed to accurately predict energy consumption, CO 2 emissions, operating costs and occupant comfort. The software’s design tool is used for room loads, plant sizing and natural ventilation. Plant and building performance are simulated hourly throughout the year to provide component sizing, energy use, running costs and CO 2 emissions. The software’s compliance tool provides ISO and CIBSE compliant building dynamic simulation and hourly component-based plant simulation. The FM tool offers detailed and accurate energy-use predictions for all cost savings for changes in operational management and plant and controls investment. www.bentley.com Bentley | Reader Service No. 21
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Reader Service No. 116 www.EDCmag.com/webcard
STUDIO By Beth Holst, GBCI
LEED Credential Maintenance Explained CALLING ALL PRESENT AND FUTURE LEED GREEN ASSOCIATES AND LEED APS WITH SPECIALTY.
THERE ARE 8 WAYS TO EARN YOUR CE HOURS, MANY OF THEM AT NO COST.
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Let’s face it: No one likes to worry about maintaining their professional credentials. But without maintenance and continuing education, professionals and firms wouldn’t be able to stay competitive. Fresh thinking is what fuels the dynamic industry of green building, which is marked by new and emerging practices and rapid transformation. Credential maintenance offers professionals the ability to stay current and advance their knowledge on the job. Fortunately, there are a variety of opportunities to maintain your LEED credential, and it starts here. Credential maintenance is a relatively new requirement of the Green Building Certification Institute (GBCI), which is the organization that administers the suite of LEED Professional Credentials (LEED Green Associate and LEED AP with specialty). The continuing education process itself is coined the Credential Maintenance Program (CMP), and it is designed to help LEED Professionals grow their knowledge base, stay current with best practices, and show clients and employers that their expertise is meaningful in an ever-demanding marketplace. To date, there are more than 44,000 LEED Professional Credential holders who are undergoing credential maintenance through a variety of ways. Joseph Marfi, director of Sustainable Design & Construction at Turner Construction Company, tells GBCI, “I became a LEED AP Building Design + Construction (BD+C) to better support my company in promoting sustainability and ultimately building better green buildings. My specialty designation shows that I am keeping up with rapidly changing green products and services through constant education and active involvement.” The process of achieving and maintaining a LEED Professional Credential can be broken down into three easy steps: STEP ONE: Earn the credential that is right for you. The LEED Green Associate credential is for those who support the green building field and may include marketing professionals, lawyers, journalists, sales professionals, students or those just
starting out in a construction or design field. For those who work on LEED projects, the five LEED AP with specialty credentials signify professionals who have project experience and have demonstrated more in-depth green building and LEED knowledge related to specific LEED project types: Q Building Design + Construction (BD+C) Q Interior Design + Construction (ID+C) Q Operations + Maintenance (O+M) Q Homes Q Neighborhood Development For professionals who are new to the LEED Professional Credential program, earning either a LEED Green Associate or LEED AP with specialty credential is achieved through passing an exam, which you can learn more about at www.gbci.org/credentials. Current LEED APs who earned their credential before GBCI introduced CMP can earn a LEED AP with specialty credential by either taking the appropriate LEED Professional Exam or, through fall of 2011, enrolling to become a LEED AP with specialty by agreeing to complete a prescriptive credential maintenance path. Information on both of these options is available at www.gbci.org/enroll. STEP TWO: Maintain. All LEED APs with specialty and LEED Green Associates are automatically entered into CMP. Under CMP, all LEED Professional Credentials are maintained on a two-year cycle either through retaking the LEED Professional Exam or through the accumulation of continuing education (CE) hours. Under the more popular option of maintenance through continuing education, LEED Green Associates need 15 CE hours every two years, three of which must be LEED-specific, and LEED APs with specialty need 30 CE hours every two years, six of which must be LEED-specific. All CE hours must be related to at least one GBCI-approved green building topic so they are relevant to green building and the LEED green building program. The topics include Synergistic Opportunities & LEED Application Process; Project Site Factors; Water Management; Project Systems
Professional Development Project Participation & Energy Impacts; Acquisition; Installation and Management of Project Materials; Improvements to the Indoor Environment; Stakeholder Involvement in Innovation; and Project Surroundings & Public Outreach. There are eight ways to earn your CE hours, many of them at no cost: 1 Professional development courses: For a course to be accepted for credential maintenance it must be approved by a GBCI-approved Education Reviewing Body. Approved courses will be identified in course catalogs and listings by displaying the CMP logo. All courses in the U.S. Green Building Council’s course catalog, at www.usgbc.org/ courses, have been reviewed and qualify for LEED Professional Credential maintenance. Many also qualify for other industry credentials’ continuing education requirements. Additional information on how USGBC offerings fulfill CMP can be found at www.usgbc.org/credentials.
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STUDIO 2 College and university courses: College and university courses qualify if they are part of curriculum for a degree and pertain to a CE category that is relevant to your credential. 3 Live presentations: Live presentations must be 50 to 90 minutes in length and pertain to a CE category that is relevant to your credential. 4 Self-study: Self-study must be at least one hour in length, or 50 to 90 minutes for an exam, and pertain to a CE category that is relevant to your credential. 5 Authorship: Published articles and books must pertain to a CE category that is relevant to your credential. 6 Certificates, professional licenses and other credentials: You can earn CE hours for any relevant certificate, professional license or credential that you are currently pursuing. 7 Committee and volunteer work: Participation in USGBC or GBCI Board of Directors, steering committees, working groups, credential exam item-writing, job task analyses and involvement with USGBC chapters are all good examples of volunteer work that supports the evolution of LEED and therefore can qualify for CE hours. Volunteer work for organizations outside of USGBC and GBCI may also apply. 8 LEED project participation: Provide documentation of the specific credits or prerequisites that you worked on for a LEEDregistered project.
TH E B E AU TY O F LO G I C .
Step Three: Record. Record your CE hours at GBCI.org at www.gbci.org/MyCredentials. Once you have satisfied the required number of CE hours, you will submit all of your hours for GBCI review and approval. BETH HOLST IS VICE PRESIDENT OF CREDENTIALING FOR GBCI, WHERE SHE IS RESPONSIBLE FOR THE DIRECT MANAGEMENT OF ALL CREDENTIALING BUSINESS LINES, INCLUDING GLOBAL EXAM DEVELOPMENT, DELIVERY AND MAINTENANCE OF CREDENTIALING PROGRAMS AND SERVICES. HOLST SERVES ON THE ANSI HOMELAND SECURITY STANDARDS PANEL (HSSP), THE ANSI CONFORMITY ASSESSMENT POLICY COMMITTEE (CAPC), THE ANSI CERTIFICATE ACCREDITATION PROGRAM’S (ANSI-CAP) ACCREDITATION COMMITTEE, AND IS A MEMBER OF THE PROJECT MANAGEMENT INSTITUTE.
ED+C is a GBCI education provider. For approved courses, visit webinar.EDCmag.com.
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Blok-Flash® delivers the surest, most costeffective control of moisture and mold growth in exterior single-wythe CMU wall systems. It provides 10 times greater bond at the exterior bed joint than a membrane through-wall system, with no water penetration, no by pass, and rapid expulsion of moisture. Blok-Flash® is a tough, lightweight, embeddable ÀDVKLQJV\VWHPVXLWDEOHIRUXVHDWDOOÀDVKLQJZHHS vent locations, including base of wall, above door and window openings, above bond beams, in paraSHWZDOOVDQGZKHUHYHUÀDVKLQJLVQHFHVVDU\ 800-664-6638
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COOL ROOFING
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A building is made up of the sum of its parts. Having an energy-
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section and reflective membranes all into the same equation.
efficient interior and forgetting the exterior just doesn’t add up.
Consider the Arlington Grove redevelopment project.
To make an envelope as sustainable as possible, many building
Photovoltaic panels were used to generate a percentage of
owners and facility managers are turning to cool roofs.
the complex’s energy requirements, while reflective shingles
Despite their growing popularity, cool roofs have been
drop the peak cooling demand. George School chose roofing
around for quite a while. Cool roofs, whether they are white,
material with a reduced environmental impact, and its green
green or solar, can be the perfect cap to a sustainable build-
roof insulates the building as it manages stormwater. Want to
ing. Sure, a reduced energy bill is what excites most people,
lower the grocery bill and reduce energy consumption? The
but cool roofs have many other noticeable benefits. Cool roofs
Scholar House’s roof provides children with vegetables they
help reduce the heat island effect in cities, lowering tempera-
grow themselves. But don’t be overwhelmed by the bountiful number of
ture and smog. In rural areas, buildings designed to mesh with
choices out there. Take a look through ED+C’s Cool Roofing
while reducing water runoff and retaining little building heat.
plus special section and gain inspiration and education from
Some buildings have taken advantage of as much square
people who have already sweated out the options.
footage as possible, incorporating solar panels, a vegetative
— The editors of ED+C
C O N T E N T S :
the surroundings gain from the aesthetics of a garden roof,
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Green Shipping
Room to Grow
Cool Roofs 101
Rooftop vegetable gardens provide new opportunities in urban environments.
Top-Down Sustainability
The Value of Solar
The new FedEx Cargo Facility features a massive green roof at Chicago O’Hare International airport.
New high-performance roofing at George School makes the grade.
Mixed-income development benefits from PV panels and highly reflective shingles.
Understanding the resources, codes and emerging technologies to specify the perfect cool roof for your next project.
By Mark J. Frisch, AIA, LEED AP
By Anna Suardini, ASLA, GRP
By Mark Robinson
By Anthony J. Summers, LEED AP
By Jessica Clark, LEED AP, and Sherry Hao
Online Only at www.EDCmag.com:
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Nature Conservancy Leads by Example The Nature Conservancy draws lightly from the local energy grid and releases no water into overburdened storm sewers. The conservancy’s goal: LEED Platinum at reasonable cost.
Reader Service No. 139 www.EDCmag.com/webcard
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GREEN SHIPPING
The new FedEx Cargo Facility features a massive Green Roof at Chicago O’Hare International Airport. By Mark J. Frisch, AIA, LEED AP
T
he new FedEx Cargo Facility at O’Hare Airport in Chicago is an impressive design response to the sustainable vision promoted by the City of Chicago’s O’Hare Modernization Program (OMP). The 363,320-gross-square-foot development includes four buildings: the World Service Center (WSC)/administration building, aircraft maintenance building, vehicle maintenance building and sort building. A 300-foot pedestrian bridge connects the WSC with the sort building, which contains the material handling systems and sortation matrix as well as support spaces.
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A RENDERING OF THE GREEN ROOF COVERING THREE OF THE FOUR BUILDINGS THAT COMPRISE THE NEW FEDEX CARGO FACILITY.
But what’s most interesting about the project is what connects the WSC, sort building and vehicle maintenance: the largest continuous vegetated roof at any airport in the world, totaling 174,442 square feet. Located next to an active runway, the design team sought a roofing system that would meet the challenging demands of an
airport environment. The roof needed to be wind resistant and leak proof, fall under a unified warranty (covering water tightness, success of plants, and overburden removal and replacement), and allow for easy identification and quick repair so that FedEx operations would never be compromised. The optimal green roof system was chosen to be a Sarnafil PVC (thermo-plastic) roof membrane with Xero Flor Vegetated Mat. The waterproof membrane layer was designed for Factory Mutual (FM) 1-35 data sheet standards, with FM tested 1-60 adhered roofing assembly and an integrated conductive layer for electronic leak detection. The membrane is fully recyclable at
THE FEDEX GREEN ROOF AT O’HARE IS THE LARGEST VEGETATED ROOF AT ANY AIRPORT IN THE WORLD. IMAGE COURTESY OF XERO FLOR AMERICA, LLC.
IMAGE COURTESY OF INTRINSIC LANDSCAPING.
IMAGE COURTESY OF INTRINSIC LANDSCAPING.
COOL ROOFING
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IMAGE COURTESY OF BRT AERIALS.
the end of its life. The vegetated mat layer was rolled out for quick installation, thereby satisfying stringent technical standards specifying high early resistance to windborne debris; there could be no risk of materials blowing off the roof and onto nearby runways. Without trays, the vegetated layer was quickly fixed to restraints, providing an instantly robust layer that would grow out and around patented anchors and disks. An experienced team of green roofing and roof membrane specialists provided technical support, while innovative contractors detailed, fabricated, installed and tested the roof system. Challenging the installation were the use of the roof as a staging area during construction and the demands of Chicago’s unforgiving winters. The green
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A CROSS-SECTION OF THE ROOFING SYSTEM.
GREEN ROOF ON THE FEDEX CARGO FACILITY Size: 174,442 square feet Location: Chicago Green Roof Type: Extensive Completed: 2010 Owner: O’Hare Modernization Program, the City of Chicago Tenant: FedEx Architect: Solomon Cordwell Buenz (SCB) General Contractor: Power Construction Company and Ujamaa Construction (a project-specific joint venture) Green Roof Consultant and Installation: Intrinsic Landscaping Inc. Roof Contractor: All American Exterior Solutions Green Roof Manufacturer: Green Roof Solutions Waterproofing Roof Membrane: Sika Sarnafil Landscape Architect: Site Design Group Vegetation Mat: Xero Flor America, Xero Flor XF301 Green Roof System Base Assembly: Green Roof Solutions Terra Roof Additional information was provided by www.greenroofs.com.
Outperforms every other insulation system on the market.
InsulBloc® SPF Insulation The Science of Comfort ®
“We’re building experts and we choose InsulBloc high performance spray foam insulation. This evolutionary multi-functional insulation requires only one trade contractor on site — so it keeps our projects on schedule and profitable — and saves our clients up to 40% on energy costs.
roofs of the 25,000-square-foot vehicle maintenance facility and 24,000-square-foot WSC were completed in one day, and the green roof of the 300,000-square-foot sort building was finished in just 17 days. The entire green roof is comprised of 3.9 acres of cultivated pre-vegetated mat with restraint anchors and more than 2,200 cubic yards of growing media plus 3.1 miles of aluminum edge treatment. The largest continuous roof area is the 724 feet by 224 feet over the sort facility. The entire roof is estimated to have a saturated weight of 4.3 million pounds and to retain 2 million gallons of stormwater annually. It also meets the OMP’s sustainability goals to reduce the urban heat island effect. Since its completion in summer 2010, the roof has withstood two severe wind events with no damage. While adding to the sustainability of one of the nation’s busiest airports, the massive green roof beautifies a large and prominent facility by providing a seasonal display of native foliage year round. MARK J. FRISCH, AIA, LEED AP, IS A PRINCIPAL AT SOLOMON CORDWELL BUENZ, AN ARCHITECTURE, INTERIORS AND PLANNING FIRM HEADQUARTERED IN CHICAGO, WITH OFFICES IN SAN FRANCISCO AND ABU DHABI. AS PRINCIPAL IN CHARGE OF TECHNICAL DESIGN, FRISCH LEADS INITIATIVES IN INNOVATIVE MATERIALS, SYSTEMS AND SUSTAINABILITY. HE CONSULTS INTERNATIONALLY ON LEED CERTIFICATION AND EMERGING DESIGN TECHNOLOGIES THAT UTILIZE ALTERNATIVE ENERGY SOLUTIONS. HE IS A LEAF AWARD WINNER FOR BEST USE OF TECHNOLOGY AND WINNER OF THE U.S. DEPARTMENT OF ENERGY’S SUN WALL DESIGN COMPETITION.
A 2.0 lb./cu ft density, closed-cell spray polyurethane foam that provides the very highest R-value.
Seals the irregular shapes of steel I beams, corrugated roof decks, and dissimilar construction material interfaces.
Forms a barrier that blocks air infiltration, noise pollution, dust, and pollen.
“InsulBloc® means comfort behind the walls, and science behind the comfort.” Jim Marsh, SVP/COO Columbia Construction Company North Reading, MA Building: Coastal Medical, East Providence, RI
The Science of Comfort
www.insulstar.com Photo: n|e|m|d architects, Cranston, RI Reader Service No. 6 www.EDCmag.com/webcard
www.EDCmag.com
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GROW ROOM TO
ROOFTOP VEGETABLE GARDENS PROVIDE NEW OPPORTUNITIES IN URBAN ENVIRONMENTS. By Anna Suardini, ASLA, GRP
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s the demand for locally grown produce increases, urban communities are becoming more and more creative in finding ways to meet that demand. Urban agriculture can be as simple as windowsill herb gardens or as vast and vibrant as large community gardens that encompass entire city blocks. The acres of unused building rooftops in these areas present the perfect environment to contribute substantially to the volume of locally grown produce in urban communities.
Gary Comer Youth Center, Chicago Not only do urban rooftops provide the space, sunlight and fresh air plants need to thrive, but in especially challenged neighborhoods they also provide a safe space for community members to interact with nature. At the Gary Comer Youth Center on Chicago’s south side, students cultivate and maintain an 8,600-square-foot rooftop vegetable garden. The garden is part of a comprehensive “seed-to-table” program where participants (ages 13-18) not only plant and harvest everything from cucumbers to popcorn to potatoes in the 18-24 inches of engineered lightweight soil on the roof, but they also take part in culinary classes where they learn to prepare fresh and nutritious meals with the produce they’ve grown. Under the direction of garden manager Marji Hess, the GCYC rooftop produced more than 1,000 pounds of food last year alone.
STUDENTS AT THE GARY COMER YOUTH CENTER CULTIVATE AND MAINTAIN A ROOFTOP VEGETABLE GARDEN. PHOTO COURTESY OF AMERICAN HYDROTECH INC.
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GARDEN ROOFTOPS PROVIDE AN OPPORTUNITY IN URBAN ENVIRONMENTS TO SAFELY INTERACT WITH NATURE. GARY COMER YOUTH CENTER, PHOTO COURTESY OF AMERICAN HYDROTECH INC.
LOW-INCOME RESIDENTS AND CHILDREN PLANT AND MAINTAIN A 3,800-SQUARE-FOOT VEGETABLE GARDEN AT THE LOUISVILLE SCHOLAR HOUSE. PHOTO COURTESY OF AMERICAN HYDROTECH INC.
Whatever produce the students don’t use themselves is sold at a farmers market and to several prominent restaurants all over the city. “The rooftop garden is both an oasis from urban stress and also a stepping stone to future careers,” says Hess. “The rooftop really shows the sky is the limit when youth and gardening are brought together.”
Scholar House, Louisville Rooftop vegetable gardens have great potential as educational opportunities. A similar program on a slightly smaller scale exists on the roof of the Scholar House in Louisville, Ky. The Scholar House provides housing for low-income single parents and children while the parents pursue degrees from local colleges and universities. Part of the adjacent
ROOFTOP VEGETABLE GARDENS ALLOW FOR THE DISTANCE FROM THE SOURCE OF FOOD TO THE TABLE TO BE MEASURED IN FEET INSTEAD OF MILES. child development center is an accessible rooftop where residents and children plant and maintain a 3,800-square-foot vegetable garden. “Our children have eaten many vegetables that they had not even seen before,” said Cathe Dykstra, president and chief executive officer of Family Scholar House, the parent organization of the Louisville Scholar House. “They tried them because they grew them and cooked them with their parent. Our programs are about learning new things to break the cycle of poverty. Nutrition and environmentally friendly living are integral to the future for our families and our community.”
Garden Roof Assembly Both projects utilize American Hydrotech’s Garden Roof Assembly, which starts with a hot rubberized asphalt waterproofing membrane and includes insulation, drainage/water retention components and soil. The soil is specially engineered for a lighter weight and optimum drainage, which allows it to be installed on a roof where weight can be a concern. This creates a gardening experience almost indistinguishable from one at ground level. Unlike a container garden, this type of built-up assembly allows nutrients and water to be shared across the roof and provides plenty of room both horizontally and vertically for the plants’ roots to spread and grow. Rooftop vegetable gardens allow for the distance from the source of food to the table to be measured in feet instead of miles. This in-
EVERYTHING FROM CUCUMBERS TO POTATOES TO POPCORN IS PLANTED AND HARVESTED AS PART OF THE “SEED-TO-TABLE” PROGRAM. GARY COMER YOUTH CENTER, PHOTO COURTESY OF AMERICAN HYDROTECH INC.
creases the nutritional quality of food and provides new opportunities for an urban population that often has limited access to fresh, highquality produce. As the local food and urban agriculture movements gain momentum, urban rooftops will become an integral part of the way we feed our cities. ANNA SUARDINI, ASLA, GRP, IS THE GARDEN ROOF TECHNICAL SALES COORDINATOR FOR AMERICAN HYDROTECH INC. SHE CAN BE REACHED AT
[email protected] OR 312.337.4998.
Visit www.EDCmag.com for a video on these rooftop vegetable gardens.
www.EDCmag.com
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Top-Down Sustainability NEW HIGH-PERFORMANCE ROOFING AT GEORGE SCHOOL MAKES THE GRADE. By Mark Robinson
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eorge School in Bucks County, Pa., hadn’t constructed a new freestanding academic facility in 33 years. So when the time came to construct a new facility, the goal was to do it right for the students, faculty, community and environment. To that end, the 26,400-square-foot, $12.5-million Learning Commons and Mollie Dodd Anderson Library at the private Quaker boarding and day high school incorporates many sustainable building elements into its design and construction, starting at the very top with vegetative and metal roofing systems. The library, designed to meet LEED Gold requirements, is comprised of a glass boxlike formation connected to two brick structures that match the nearby historic George School Meetinghouse, which was built in 1812. More than 60 percent of the new materials were obtained from regional resources and more than 50 percent of the materials utilized for the new library contained recycled content, including the Follansbee TCS II metal roof. Furthermore, the TCS II is 100 percent recyclable. Approximately 12,000 square feet of terne-coated stainless steel was installed as a double-lock standing-seam roof, and an additional 1,500 square feet was used for the fascia and soffits of the roof. The material has reduced life-cycle costs and environmental impact, and it is virtually maintenance free. It resists corrosion and endures harsh weather and was selected for building longevity while illustrating George School’s commitment to sustainability. A vegetative roof from American Hydrotech was installed in conjunction with the metal roof to provide stormwater management and building insulation. The roof absorbs rain and melted snow, and releases it slowly back into the stormwater drainage system at a slower rate than a traditional roof. The vegetative roof is made of a several-inch thick layer of fine material similar to lava rock and is planted with 10 different varieties of grass-like vegetation called sedum. The vegetative roof’s design allows it to insulate the building, reducing the workload on the library’s geothermal heating and cool-
LEARNING COMMONS AND MOLLIE DODD ANDERSON LIBRARY Location: George School in Bucks County, Pa. Roofing: Vegetative and metal roofing systems Size: 26,400 square feet Completed: September 2009 Architect: Bowie Gridley Architects, Washington, D.C. General Contractor: W.S. Cumby, Springfield, Pa. Distributor: North Coast, York, Pa. Roofing Installer: Kraus Commercial Roofing Inc., Ottsville, Pa.
ing system in a way that a normal roof could not. The school maintains the vegetative roof; other than watering, the roof’s maintenance consists of quarterly weeding and biannual light fertilization. Both roofing systems provide long life expectancies, energy savings and visual appeal. A metal roof can deliver useful service for 50 years or more, while the vegetative roof is expected to last 40 years. The metal roof features an attractive, softlooking, protective patina finish. Unaffected by heat or UV light, the metal will never need to be painted, according to the manufacturer. In addition to the library, the George School building includes five classrooms, a learning center, offices, a conference room and an art gallery. Additional green building features include native plant rain gardens, FSC-certified wood, low-VOC paints, carpets and glues, waterless urinals and low-flush toilets. Construction began in fall 2008 and the library was completed in September 2009. LEED Gold certification was awarded in March 2010. MARK ROBINSON IS PRESIDENT AND GENERAL MANAGER FOR FOLLANSBEE, A MANUFACTURER OF PRE-PAINTED OR NATURAL TERNE ROOFS AND A SUPPLIER OF METAL ROOFS FOR NEW AND RETROFIT COMMERCIAL, RESIDENTIAL AND HISTORIC PROJECTS. HE CAN BE CONTACTED AT 304-527-1260 OR
[email protected]. VISIT WWW.FOLLANSBEEROOFING.COM FOR MORE INFORMATION.
A SLIDESHOW OF THE GREEN ROOF INSTALLATION IS AVAILABLE AT WWW.GEORGESCHOOL.ORG. PHOTOS COURTESY OF GEORGE SCHOOL. www.EDCmag.com
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The Value of Solar MIXED-INCOME DEVELOPMENT TARGETING EGC CRITERIA BENEFITS FROM PV PANELS AND HIGHLY REFLECTIVE SHINGLES. By Anthony J. Summers, LEED AP
T
he Arlington Grove neighborhood in north St. Louis has seen its share of hard times in recent years, but through the efforts of the community’s dedicated church officials, residents and aldermen, plus developer McCormack Baron Salazar, KAI Design & Build, the City of St. Louis and the St. Louis Housing Authority, its future is looking brighter and greener. The $41 million Arlington Grove redevelopment project is considered one of the first mixedincome developments in the country designed to Enterprise Green Communities (EGC) criteria, and it is a first for Missouri and the City of St. Louis. A unique aspect of the development’s design is the specification of photovoltaic panels and highly reflective shingles to reduce energy consumption. Plans for the development include 112-mixed finance, mixed-income rental units in garden apartments, townhouses, semi-detached housing, a new mixed-use building and the rehabilitation of the historic Arlington Elementary School for a total gross residential square footage of 162,000 and 5,000 square feet of commercial/retail. Plans for the school renovation and surrounding block include 21 apartments and 91 new construction townhomes and garden apartments designed to meet mandatory EGC criteria and were required by the Capital Fund Recovery Competition (CFRC) grant, a stimulus-related grant awarded by the Department of Housing and Urban Development (HUD).
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PV PANELS AND ENERGY STAR SHINGLES WILL TOP THE ARLINGTON GROVE DEVELOPMENT. RENDERING COURTESY OF KAI DESIGN & BUILD.
PV Panels and ENERGY STAR Shingles Photovoltaic panels are expected to provide at least 10 percent of the development’s total energy demands. The panels are specified for the roof of the new mixeduse building and other flat-roof buildings in the development. Any power generated by the panels will be fed back to the local utility. The utility company will then “buy back” electrical energy from the building, the simplest option for most owners. Utility companies generally buy the energy back at a lower rate than normally billed by the user. The majority of the buildings in the development, including the elementary school building, will feature highly reflective, ENERGY STAR-qualified shingles. According to the EPA, solar reflectance is
the most important characteristic of a roof product in terms of yielding the highest energy savings during warmer months. The higher the solar reflective value, the more efficient the product is in reflecting sunlight and heat away from the building and reducing roof temperature. The EPA estimates that about $40 billion is spent annually in the U.S. to air condition buildings — one sixth of all electricity generated in a year. ENERGY STARqualified roof products can lower roof surface temperatures by up to 100 degrees Fahrenheit, decreasing the amount of heat transferred into a building. According to the EPA, ENERGY STAR-qualified roof products can help reduce the amount of air conditioning needed in buildings and can reduce peak
cooling demands by 10 to 15 percent, which may allow the home or building owner to purchase a smaller, less expensive and more efficient cooling system. These roof products may also maintain a more constant temperature, therefore reducing thermal shock and helping to extend the life of the roof. ANTHONY J. SUMMERS, LEED AP, BRINGS MORE THAN 35 YEARS OF EXPERIENCE TO HIS ROLE AS SENIOR PROJECT MANAGER FOR KAI DESIGN & BUILD (WWW.KAI-DB.COM). WITH SPECIFIC EXPERTISE IN GREEN/SUSTAINABLE PROJECTS, SUMMERS HAS RECENTLY MANAGED THE CONSTRUCTION OF TWO LEED SILVER-CERTIFIED RECREATIONAL CENTERS AND A GREEN HOUSING DEVELOPMENT FEATURING SOLAR PANELS AND OTHER INNOVATIVE SUSTAINABLE ELEMENTS.
The Economical Edge. When it comes to roofs and exterior walls, metal really shines: t -PXFSTNBJOUFOBODFDPTUT t $POUSJCVUFTUPUBYDSFEJUT t $BOCFEFTJHOFEUPXJUITUBOETFWFSFBDUTPGOBUVSF t %FDSFBTFTIFBUJOHBOEDPPMJOHFYQFOTFT t .BJOUBJOTMPOHFSMJGFTQBO
Metal. Less is more. The Metal Initiative is an industry-wide program to educate owners, architects, and contractors about the use of metal in building construction. Visit www.themetalinitiative.com for informational and educational resources to help you get more building for your money.
www.themetalinitiative.com The source for information on metal.
Reader Service No. 213 www.EDCmag.com/webcard
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Cool Roofs 101 UNDERSTANDING RESOURCES, CODES AND EMERGING TECHNOLOGIES TO SPECIFY THE PERFECT COOL ROOF FOR YOUR NEXT PROJECT. By Jessica Clark, LEED AP, and Sherry Hao
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s global interest has increased in passive, energy-saving technologies, cool roofs have received a significant boost in awareness and research over the past year. In both commercial and residential applications, people are discovering the comfort, energy efficiency and climate change mitigation benefits of cool roofs. Several code bodies and green building programs are catching on as well, with more energy codes specifying cool roof standards. Cool roofs are moving into the spotlight and emerging technologies are pushing the entire industry to a sustainable and energy-efficient future. With heightened demand for this simple yet effective product, several tools have been created to help contractors, building owners and architects specify cool roofs.
Cool Roof Resources As there are thousands of product options just for cool roofing, specifying an appropriate roof can be a daunting task. Cool roofs are available in all colors for virtually every roofing type, although white is still the most efficient option. You can gauge the energy performance abilities of a roofing product by understanding how a cool roof reflects and emits the sun’s heat back to the sky instead of transferring it to the building below. Once you understand the basic technology of cool roofing, there are several resources available to help you make a confident, informed decision on your next project. Solar reflectance and thermal emittance are the two key metrics determining how “cool” a roof will stay by its ability to reflect solar energy and emit absorbed heat. Solar reflectance and thermal emittance will appear as a value between 0 and 1, with a higher value signifying a “cooler” roof. Solar Reflectance Index (SRI) is a third metric that is calculated using a product’s solar reflectance and thermal emittance values. It is measured on a scale of 0 to 100 with a higher number symbolizing a more energyefficient roof. SRI is sometimes used by code
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bodies or green building programs in place of solar reflectance and thermal emittance as a single-value alternative. Cool roof standards often specify higher reflectance requirements for low-slope, flat rooftops versus steep-slope, pitched rooftops. This difference in values is due to the energy impact the surface type faces, as the flat surface of a low-slope rooftop is exposed to greater solar radiation than a pitched roof. Another factor in which roofing products are unique is that they are exposed to outdoor conditions that may alter the energy performing ability of the product. Each product is therefore tested initially as available straight off the shelf, as well as after it has been weathered by outdoor elements. A study by the Oak Ridge National Laboratory and DLR consultants found that the loss of effectiveness of solar reflectance for most roof types leveled out at around three years, so it is an industry standard to test roofing materials after three years of aging to determine their aged value.1 Code bodies sometimes reference this aged value, as it more accurately reflects the performance of the roof through its life cycle. The Cool Roof Rating Council (CRRC) is a third-party rating program that works with manufacturers to rate their products’ solar reflectance and thermal emittance. The
Rated Products Directory is a free online database of roofing products rated by the CRRC (www.coolroofs.org). Code bodies and voluntary green building programs define a cool roof by specifying a minimum value for initial and aged solar reflectance, thermal emittance and SRI, or a combination thereof. The CRRC does not set minimum standards for products to be listed on its Rated Products Directory, but provides unbiased and credible ratings for all products. You can search through more than 2,000 products by categories such as material type, color or manufacturer. You can even search by minimum initial or aged solar reflectance, thermal emittance or SRI value in order to fine-tune your search to products that meet a specific code or program standard. While code bodies set cool roof minimum standards as guidelines, many people find it more realistic to specify a cool roof based on quantifiable benefits. The U.S. Department of Energy (DOE) and the Environmental Protection Agency (EPA) have both created cool roof calculators to determine energy and monetary savings based on climate, building size, HVAC equipment and other important factors. QThe DOE Cool Roof Calculator (http:// www.ornl.gov/sci/roofs+walls/facts/
COOL ROOF CODES AND VOLUNTARY PROGRAMS California Title 24: Low-slope products must meet aged reflectance values of 0.55, steep-slope products must meet aged reflectance values of 0.20, heavy mass steep-slope products must meet aged reflectance values of 0.15, and all products must meet 0.75 for emittance. ENERGY STAR program: Provides a list of products that meet a minimum solar reflectance of 0.65 for initial and 0.50 for aged low-slope roofs and an initial solar reflectance of 0.25 and aged of 0.15 for steep-slope roofs. LEED 2009 Rating Systems for New Construction, Core and Shell, Schools, and Existing Buildings: A credit may be achieved by specifying a new or existing roof that has an initial SRI of greater or equal to 78 for low-slope roofs and 29 for steep-slope roofs. Green Building Initiative’s Green Globes program: Offers credit for a cool roof of an SRI of 78 for low-slope and 29 for steep-slope roofs.
The sun’s radiation hits the roof surface
Solar Reflectance: The fraction of solar energy that is reflected by the roof
Thermal Emittance: The relative ability of the roof surface to radiate absorbed heat
Some heat is absorbed by the roof and transferred to the building below COURTESY OF CRRC.
CoolCalcEnergy.htm) offers savings estimates for small- and medium-sized facilities with flat roofs. QThe EPA Roof Savings Calculator (http:// www.roofcalc.com/) is designed for both residential and commercial buildings, and it allows you to define information about your existing and proposed roofs for comparison. The cool roof calculators show the tangible savings gained from cool roofs, yet cool roofs offer several other environmental benefits. Eco-conscious designers may also want to consider the cradle-to-cradle aspects of their material choices, including recycled content, end of life recyclability and toxicity of materials. 2
What’s Next for Cool Roofs In July 2010, Secretary of Energy Steven Chu launched an initiative to install cool
roofs on DOE and government buildings. Recognition of the benefits of cool roofs, like the DOE initiative, and the development of emerging technologies promises to transform the future marketplace. Several laboratories, universities and companies are already conducting research on new cool roof products, from self-cleaning to thermally sensitive materials to solar panels that take advantage of cool roofs. Although they may seem like conflicting technologies, cool roofs can be complimentary to solar photovoltaic panels. According to the DOE, a cool roof can keep the roof surface 50 percent cooler than a dark roof under the same conditions.3 Solar panels may perform more efficiently and for a longer lifespan under the cooler conditions provided by a cool roof. Panels by California solar photovoltaic manufacturers Solyndra have even been developed with curved surfaces to take
advantage of light refracted off the cool roof.4 The Lawrence Berkeley National Laboratory’s Heat Island Group is conducting research on the effects of dirt and algae on the roof surface over time, and it is working to develop an accelerated aging process. This can significantly decrease the aged testing timeline, allowing roofing manufacturers to design and improve product formulas without waiting three years for the aged performance. The Heat Island Group is also working on a self-cleaning surface for roofing materials to reduce the effects of weathering on solar reflectance values. The scientists at United Environment and Energy LLC are developing a coating that can recognize temperature changes to either reflect or absorb solar energy depending on what would be more advantageous for the building.5 The coating is created using waste cooking oil from restaurants and can www.EDCmag.com
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be adapted to different climates with preset temperature thresholds. A team at the Massachusetts Institute of Technology has focused on a similar concept, designing a roof tile that changes colors according to temperature.6 The tiles are made of common polymers encapsulated by a clear plastic top layer and black back layer. These are just a few examples of new technologies that are pushing roofing materials to have the ability to maintain high-performance after weathering while decreasing both cooling and heating loads for a building. Despite the benefits of cool roofing, it is still a ways off from being adopted as a standard building practice. In the U.S., it faces barriers from misconceptions, aesthetic design concerns and moisture issues caused by non-comprehensive installations. Yet, cool roofing is a simple design measure that can provide significant energy savings and environmental rewards. The Lawrence Berkeley National Laboratory’s Heat Island Group estimates that buildings with cool roofs use up to 40 percent less cooling energy than buildings with dark colored roofs. 7 A designer specifying a rooftop now has several resources available to make informed and confident cool roof choices. With increasingly rigorous roofing code and program standards, and promising emerging technologies on the horizon, cool roofs are quickly becoming one of the most effective ways to save energy and help mitigate global warming.
JESSICA CLARK, LEED AP, IS THE MARKETING LIAISON FOR THE COOL ROOF RATING COUNCIL (CRRC). SHE ORGANIZES EDUCATIONAL OUTREACH FOR THE PROGRAM INCLUDING PRESENTATIONS, WRITING AND SPEAKING ENGAGEMENTS AS WELL AS MARKETING MATERIAL. CLARK RECEIVED A B.A. IN ARCHITECTURE FROM THE UNIVERSITY OF CALIFORNIA, BERKELEY. SHERRY HAO IS THE ADMINISTRATIVE MANAGER FOR THE CRRC. SHE OVERSEES TEST METHODS AND STANDARDS DEVELOPMENT AS WELL AS EDUCATIONAL, MARKETING AND OUTREACH EFFORTS. HAO HAS REPRESENTED THE CRRC PRESENTING AT CONFERENCES THROUGHOUT THE WORLD. SHE RECEIVED HER B.S. IN MECHANICAL ENGINEERING FROM CORNELL UNIVERSITY. Endnotes 1: Roodvoets, D., Desjarlais and W. Miller, (April 2004). Long Term Reflective Performance of Roof Membranes. RCI Annual Conference 2: The Cool Roof Rating Council. (March/April 2009) What’s So Cool About Cool Roofs? GreenSource. Web. January 6 2011.
3: http://www1.eere.energy.gov/femp/pdfs/coolroofguide.pdf 4: http://www.solyndra.com 5: http://www.sciencenews.org/view/generic/id/57485/title/Cool_roof_coating_Mechanism_ kept_under_wraps 6: http://www.greentechmedia.com/articles/read/mit-team-invents-color-changing-roof-tiles 7: http://heatisland.lbl.gov/CoolRoofs
Want fresh green heat? Save the environment. Save heating energy. Save money.
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JOIN THE REVOLUTION. ATTEND THE CONVENTION THAT MATTERS. Bold thinking. Radical ideas. New ways to plan, design, practice and collaborate. The challenges we’re facing today require no less than a full-blown design revolution. Be in New Orleans May 12-14 to join forces with the innovators and change agents who are leading the charge into the future. For serious architects and design professionals, no other convention matters more. DESIGN KNOWLEDGE IS POWER. Acquire all your learning units at one time, efficiently and cost-effectively. Comprehensive program available online. IMMERSE YOURSELF IN INNOVATION. AIA Expo2011 is now an all-new expo experience, with new energy, new resources and inspiration everywhere. MAKE CONNECTIONS THAT MATTER. Gather here with colleagues from across the country, meet specialists in other fields and exchange ideas. JOIN US IN NEW ORLEANS. Learn the lessons of this unique region, while you explore your critical role as advocate for your own community’s future. ACT NOW. Take advantage of early discounts: Register and book your hotel by 4/11/11. www.aia.org/convention Questions? 800-242-3837 or [email protected]
ADINDEX
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ENVIRONMENTAL DESIGN & CONSTRUCTION Volume 14, Issue 2 (ISSN 1095-8932) is published 12 times annually, monthly, by BNP Media II, L.L.C., 2401 W. Big Beaver Rd., Suite 700, Troy, MI 48084-3333. Telephone: (248) 362-3700, Fax: (248) 362-0317. No charge for subscriptions to qualified individuals. Annual rate for subscriptions to nonqualified individuals in the U.S.A.: $115.00 USD. Annual rate for subscriptions to nonqualified individuals in Canada: $149.00 USD (includes GST & postage); all other countries: $165.00 (int’l mail) payable in U.S. funds. Printed in the U.S.A. Copyright 2011, by BNP Media II, L.L.C. All rights reserved. The contents of this publication may not be reproduced in whole or in part without the consent of the publisher. The publisher is not responsible for product claims and representations. Periodicals Postage Paid at Troy, MI and at additional mailing offices. POSTMASTER: Send address changes to: ENVIRONMENTAL DESIGN + CONSTRUCTION, P.O. Box 2148, Skokie, IL 60076. Change of address: Send old address label along with new address to ENVIRONMENTAL DESIGN + CONSTRUCTION, P.O. Box 2148, Skokie, IL 60076. Canada Post: Publications Mail Agreement #40612608. GST account: 131263923. Send returns (Canada) to Pitney Bowes, P.O. Box 25542, London, ON, N6C 6B2. For single copies or back issues: contact Ann Kalb at (248) 244-6499 or [email protected].
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By Derrick Teal
PARTING
Take one look at this concept design by Russian architect Alexander Remizov, and you might catch yourself starting to sing, “It walks down stairs, alone or in pairs and makes a slinkity sound.” But the “Ark” was designed with the intent of housing as many as 10,000 people as a response to possible catastrophic climate change on the planet. It’s capable of existing in a number of hostile environments, contains an autonomous lifesupport system and has self-contained systems to generate energy. The cupola’s form assists to create an air-eddy at the outer surface around the central bearing, where a wind
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power generator and tornado generator are placed. The building’s form itself is designed for placing photoelectric panels at angles corresponding with the sun. Heat is collected in seasonal heat accumulators, in electric and hydrogen accumulators, in order to provide an uninterrupted energy supply for the whole complex no matter the environmental conditions. Structurally, the frame consists of a framework of prefabricated timber and tensioned steel ropes. It’s covered by a special ethyl tetrafluoroethylene foil that is transparent, self-cleaning, recyclable, and more durable, more economical and lighter than glass. The foil itself is fixed to the framework by special metal profiles, which simultaneously serve as solar collectors for water heating and as gutters intended for collecting rainwater from the roof surface. And that Slinky-like design, using the aforementioned tensioned steel ropes,
Use: Hotel, housing Designer: Alexander Remizov Site area: 48,437 square feet Building floor area: 31,215 square feet Total floor area: 150,694 square feet
is intended to protect the structure from earthquakes by evenly distributing the load. Coupled with the lightweight structural components, the design is also supposed to enable the entire complex to float in case of ocean levels rising to catastrophic levels. Given all of what the structure seems capable of, maybe it can go down stairs…if there were a flight of stairs large enough. IMAGES COPYRIGHT REMISTUDIO.
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comfort loves energy bills Why should the fear of utility costs make us shiver and sweat? Advanced building envelope solutions improve energy efficiency and comfort for building occupants in every climate. Get comfortable with your energy bill. At BASF we create chemistry. www.basf.us/construction
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