Headquarter Honda
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Headquarter Honda; Photos Courtesy of Tecta AmericaProject Name: Headquarter Honda
Year: 2010
Owner: Headquarter Honda
Location: Clermont, FL, USA
Building Type: Commercial
Type: Extensive
System: Single Source Provider
Size: 6000 sq.ft.
Slope: 1.5%
Access: Accessible, By Appointment
Submitted by: Geoffrey Hagan, Tecta America

Designers/Manufacturers of Record:
Waterproofing Membrane: Soprastar Cap Sheet, Soprema
Modular Greenroof System: Tecta Tray, TectaGreen
General Contractor: Schmid Construction
Growing Media & Plant Supplier: Dr. Marty Wanielista, Stormwater Treatment Environments, LLC
Architect & Project Designer: Tony Jimenez, Jimenez and Associates
Deck: Lightweight Insulated Concrete, Concrecel
LEED Project Administrator & Site Project Manager: Josh Jeppesen, LEED AP, Schmid Construction
Installation & Co-Designer: Geoffrey Hagan, LEED AP, Tecta America Central Florida
Headquarter Honda; Photos Courtesy of Tecta AmericaHeadquarter Honda; Photos Courtesy of Tecta America
For the owners of the Headquarter Honda facility in Clermont, Florida, building a landmark LEED? Platinum project meant incorporating nearly every type of environmental rooftop solution including reflective membrane, day-lighting, PV, solar thermal, and a vegetative roof system. Completed in January 2010, the building has a 126 kW solar PV system and a 6,000-square-foot extensive, irrigated greenroof.

As is common in construction, there were several hurdles the design and construction team had to solve. While installations using PV and vegetative roofing in a totally integrated system can create a cooler environment in which solar panels can function, because PV is so susceptible to shading, the original layout needed to be reworked several times to accommodate ductwork and other existing impediments.
Headquarter Honda; Photos Courtesy of Tecta America
The 40,000-square-foot, two-ply torch applied modified bitumen roof system by Soprema featured their LEED? compliant, highly reflective Soprastar cap sheet. The membrane surface performs with an initial Solar Reflective Index of 96. This membrane was installed over Concrecel?s lightweight insulated concrete (LWIC). LWIC was chosen for its long lifecycle and ability to be reused when the existing 20-year roof system needs to be replaced. All metal flashings and trim were fabricated from high-recycled content aluminum and attached to Forest Steward Council (FSC)-certified lumber.

The greenroof is comprised of a Tecta Tray modular system with 5,250 square feet of native vegetation including: Muhlly Grass, Purple Love Grass, Frogs Fruit, Blackeyed Susans, Gaillardia, and Sunshine Mimosa, as well as 1,400-square-feet of pavers. Marty Wanielista of Stormwater Treatment Environments, LLC provided the custom blended growth and pollution control media and plants for the project. Slow drip-irrigation covers the system in four independently controlled zones and is fed by a massive underground cistern system. The green tint biodegradable erosion/wind netting protects the entire system for up to one year at which time it will decompose into the growing media.

On a project combining sustainable technologies, one of the most difficult aspects of the project can be scheduling. Since the installers are working with a live eco-system, Mother Nature plays an enormous role, particularly in harsh climates. Florida?s recent remarkably cold winter held planting off until mid-March. In order to save time, the trays were constructed offsite indoors, and shipped to the job site in February for installation with the irrigation. This allowed for a two-day planting once the weather improved. In order to ensure the best success with their greenroof, the building owner chose a 20-year, TectaGreen overburden warranty and a two-year maintenance agreement, which will help with plant establishment and elimination of invasive species.

Additional thumbnail photos:

Headquarter Honda; Photos Courtesy of Tecta AmericaHeadquarter Honda; Photos Courtesy of Tecta AmericaHeadquarter Honda; Photos Courtesy of Tecta America
Headquarter Honda is located at 17700 State Road 50, Clermont, FL 34711; 800.497.2294. Visit their website, and learn specifically about their philosophy and sustainability measures here. See a video "...documentary that reveals the conception, construction and grand opening of HQ Honda; one of the highest energy efficient car dealerships in the United States" by Cris Mertens (19:15 minutes). Read about the project in "Integrated design for Solar & Green Roofs" by Geoff Hagan in the Summer 2010 issue of the Living Architecture Monitor here. Learn about Tecta America in The Greenroof Directory.
 
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