Greenroofs.com Project of the Week: 12/19 & 26/11
Tremco Incorporated Headquarters
Beachwood, OH, USA
9,000 sf. Greenroof
Owner: Tremco, Inc.
Location: Beachwood, OH, USA
Building Type: Corporate
System: Single Source Provider
Size: 9,000 sq. ft.
Access: Accessible, Private
Project Description & Details
Tremco Incorporated is dedicated to the development of high-performance buildings characterized by energy efficiency, limited environmental impact and low operating costs. Last year (in 2010) they began a foundation-to-roof renovation of its 40-year-old-headquarters with the goal to transform the building into a showcase of sustainability that would achieve LEED Gold certification.
Tremco’s new 46,000 sf corporate headquarters incorporated numerous sustainable features into its renovation including four types of sustainable roofing systems. The vegetated roof features 46 species with almost 16,000 plants, designed with four different sections to create a variety of low-maintenance plant life and edibles; the new HQ also has a living facade trellis system on several walls on top of the roof. During the renovation, Tremco sent nothing to landfills. Almost 100 percent of everything removed was recycled, reused or burned for energy.
Designers/Manufacturers of Record
Green Facade System: FRP planters and VertiGreen trellis, Tournesol Siteworks
Completely renovated from top to bottom at a cost of $5.5 million, the 40-year old Tremco Incorporated (an RPM Company) headquarters is now a sustainable, high performance building that is energy efficient, has limited environmental impact and operates with the lowest possible life-cycle costs.
Made possible by their parent RPM Building Solutions Group companies and other partners, the objectives were to improve energy efficiency and conserve water; reduce operational costs; provide a safer, healthier facility; and protect the natural environment by reducing our carbon output, lowering the local heat island effect, and recycling and reusing material to keep it from being hauled to a landfill. Their goal is to become one of the few LEED Gold certified facilities currently located in Ohio.
The wealth of internal expertise of the sister companies was obvious and the project was viewed as a showpiece of their innovative people, services, and products as well as of sustainable construction technology.
“It leverages what we do best: help building owners maintain what they have. That was the driving force behind the company’s coatings business. Since our company was founded, our goal has been to help owners extend the life of their roofs and, ultimately, their entire building. That’s the best form of sustainability, and it minimizes what goes to landfills. We wanted to demonstrate what we could do in a bigger and better way and what better way to walk the talk than with our own headquarters.” ~ Deryl Kratzer, President of the Tremco Roofing and Building Maintenance Division in Roofing Contractor, October 2011
Construction best practices that WTI, the general contractor on the project, and its subcontractors followed to increase the project’s sustainability included:
- Onsite sorting of materials
- Recycling of all non-hazardous material
- Chain-of-custody documentation for all off-site recycling
- Reusing materials as applicable
- Verifying that materials are certified for LEED credit
You can follow their blog, “Building Green on Green – The Tremco Headquarters Green Transformation” which chronicled the renovation of Tremco Incorporated’s headquarters and continues to report on sustainability concerns for the company. For example, in October, 2010 Tremco HQ launched a commitment to being a zero landfill facility and as of the end of October, 2011, it had kept more than 190,000 pounds out of the landfill since November 2010.
According to the website, the Tremco HQ renovation’s most noteworthy sustainable features include four types of sustainable roofing systems:
- Vegetated roof featuring local plants. Low impact lighting and a water capture system are integrated with the roof with a pathway of recycled materials. Signs describe the roof’s features and provide information about the plant palette.
- The ENERGY STAR ® qualified Rock-It™ roof surfacing system, composed of white gravel set in white adhesive.
- A white, reflective, single ply system installed beneath a rooftop photovoltaic (PV) system.
- A thin-film rooftop PV system is used to generate electricity for the building. A second PV system on a white reflective roof will be installed on the South building.
- A Dryvit Outsulation Plus ® MD exterior wall system featuring Dryvit’s TerraNeo™ finish. The system provides an energy efficient, insulated facade and can be applied directly to the existing slate, eliminating the time and potential waste of removing the facade.
- High-performance, double pane, tinted windows that exceed minimum energy standards. Tremco sealants and gaskets are used, along with Tremco’s Proglaze ® ETA (Engineered Transition Assembly) to ensure an airtight transition from window to wall.
- New sidewalks, with decorative concrete from Increte Systems, are supported by gravel from one of the building’s existing roofs.
- A 1.8kW rated wind turbine installed on the property helps generate electricity.
- Numerous interior upgrades such as ADA-compliant restrooms, interior window treatments, elevator modernizations with eco-friendly technology and ADA compliance.
- Mechanical/Engineering/Plumbing upgrades such as new control system that ensures an accurate operating schedule of HVAC and lighting as well as improved zone control; modifications to the central air handling system to enable variable flow, resulting in significant energy savings; and replacing the cooling tower with a variable speed model that also eliminates the need for water treatment.
During renovation for the greenroof, they took it down to the deck and installed a system including a two-ply vapor retarder, insulation, a TPA (Tri-Polymer Alloy) adhered membrane, engineered growing media and plants, as well as Tremco’s own Bio-Tray Vegetated Roof Delivery System.
Interpretive signage identifies the plants and describes benefits and the system, among other issues:
Craig Nelson, vice president of construction operations for WTI, said that the R-value for the vegetative roof is above 100.
The 46 different kinds of plants on the roof also include edibles – herbs and fruits such as basil and blueberries that the company is using in its own cafeteria.
Walkways were made from slate recycled from the original mechanical room wall facades, and low-impact lighting was installed so the walkways could be used in the evening.
Tournesol Siteworks‘ FRP planters and VertiGreen trellis were employed for the living walls which support freestanding plantings within the roof garden as well as attached to building walls, providing areas to camouflage unattractive mechanical systems and feature beautiful plantings.
“This renovation gives us an exceptional opportunity to show our commitment to sustainability to our customers, staff, suppliers and others,” says Randy Korach, president of Tremco Inc. in BXMagazine.com, October 2011.
In addition to an 84% reduction in natural gas usage, a 43% reduction in electricity, an Energy Star rating between 85 and 90, and far better use of water resources, the Tremco HQ has also become a teaching tool for customers. The lobby display shows actual performance and an upper level classroom for AIA-approved courses contains a cross-section of the vegetative roof. You can also recieve a CD-ROM that shows how the structure was transformed and explains the technologies involved.
See the Tremco Headquarters Sustainable Renovation video (5:28) below on Tremco’s YouTube Channel:
The greenroof is featured in the 2012 Greenroofs & Walls of the World™ 12 Month Wall Calendar in the month of November and is the film location of Ralph Velasquez’s Keynote Address, “Corporate Social Responsibility – The Who, What, Where, When and How” from our inaugural Greenroofs & Walls of the World™ Virtual Summit 2011:
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Love the Earth, Plant a Roof!
~ Linda V.