GreenGrid^® Roof First-of-its Kind at Federal Facility

Vegetative Roof Sets Stage for Future Roofing Solutions

The Tobyhanna Army Depot (TYAD) is the largest full-service electronics maintenance facility in the Department of Defense (DoD). The GreenGrid^® vegetative roof installed at the depot is considered to be the first green roof on a U.S. DoD building. It is located on one wing of the Headquarters Building and is part of a demonstration project that will measure energy savings, stormwater runoff reduction, stormwater quality, and roof membrane longevity.

Eye on Sustainability

• The GreenGrid^® roof analysis showed a 10% reduction in stormwater runoff, improved stormwater quality, and a 25% reduction in energy costs for the building.
• A 30% reduction in energy costs is expected for the building.

Project Features

• Preparatory work included the removal of approximately 12,000 square feet of existing stone ballast and the application of additional membrane flashing at field seam locations.
• Over 60 varieties of Sedums and Alpine plant species fill the 1,538 GreenGrid^® extensive modules.
• 14,141 square feet of green roof space on one wing of headquarters building.
• Modules made of recycled plastic trays measuring 4 feet long, 2 feet wide and 4 inches deep.

Performance Milestones

• Maintained the waterproofing warranty on the roof, which is expected to last significantly longer now that it has been greened.
• Completed green roof installation in 7 days.