Greenroofs.com Project of the Week: 9/14/15

The Empire State Building
New York, NY, USA
21st Floor East & West – 3,450 sq. ft. each;
25th Floor Northwest – 1,000 sq. ft.;
& 30th Floor West – 1,200 sq. ft;
Total: 9,100 sq. ft. Greenroofs

Project Description & Details

Soaring 1,454 feet above Midtown Manhattan, the Empire State Building is the “World’s Most Famous Office Building.” With new investments in energy-efficiency, building-wide infrastructure upgrades, public areas, and amenities totaling more than $550 million, the grand Art Deco skyscraper continues to attract corporate office tenants in a diverse array of industries from around the world. Declared by the American Society of Civil Engineers to be one of the Seven Wonders of the Modern World, four roofs have been greened at the Empire State Building by Xero Flor America, totaling 9,100 sf:

21st Floor East & West: XF301 + ¾”XT; the dry weight is 7 lb/sf, and the saturated weight is 13 lb/sf. The green roofs on the 21st floor feature rooftop patios with outdoor furniture for the enjoyment of office tenants in the adjacent offices. Xero Flor Plant Mixes: Standard Northern Climate Xero Flor Mix, supplemented with moss species.

25th Floor Northwest: XF322 Sedum-Moss System with a dry weight of 4 lb/sf and saturated weight of 8 lb/sf. This option was used here because this roof area receives little direct sunlight and is not accessible. Xero Flor Plant Mixes: Xero Flor Sedum-Moss Mix.

30th Floor West: XF301 + ¾”XT; inaccessible. Xero Flor Plant Mixes: Standard Northern Climate Xero Flor Mix, supplemented with moss species.

Referring to its comprehensive energy efficiency retrofit program, Tom Durels, executive vice president of Malkin Holdings, L.L.C., which supervises the LEED-EB Gold certified Empire State Building, says “The new green roofs further demonstrate our sustainability leadership and add appealing green space that enhances the value of office space for our tenants.”

Find more photos and additional information on each profile in The International Greenroof & Greenwall Projects Database: 21st Floor East & West, 25th Floor Northwest, and 30th Floor West.

Year: 2011 and 2013
Owner: Empire State Building Associates, LLC
Location: New York, NY, USA
Building Type: Commercial
Type: Extensive
System: Single Source Provider
Size: 21st Floor East & West – 3,450 sq. ft. each; 25th Floor Northwest – 1,000 sq. ft.; 30th Floor West – 1,200 sq. ft
Slope: 1%
Access: Accessible & Inaccessible; Private

Designers/Manufacturers of Record:

Green Roof Consultant/ Sun-Shade Analysis/ Maintenance Provider: New York Green Roofs, LLC
Green Roof Designer: Xero Flor America (XFA), LLC
Green Roof System & Manufacturer: XF301 + ¾”XT & XF322, Xero Flor America (XFA), LLC
Roofing and Waterproofing Consultant: CRA / CRS, Inc. – Commercial Roofing Solutions, Inc
Wind Security Components: Green Roof Solutions, Anchor and Disk System
Geogrid: TenCate Geosynthetics Americas, Miragrid LS
Pavers: Hanover Architectural Products, Prest Pavers
Irrigation System: National Lawn Sprinklers, Inc.

Project of the Week Video Feature

Watch The Empire State Building Project of the Week Video below or see it on our GreenroofsTV channel on YouTube:

Did we miss your contribution? Please let us know to add you to the profiles:  21st Floor East & West, 25th Floor Northwest, and 30th Floor West.

Would you like one of your projects to be featured? We have to have a profile first!

Love the Earth, Plant a Roof (or Wall)!

~ Linda V.