International Monetary Fund (IMF) HQ #2

Project Name: International Monetary Fund (IMF)HQ #2Year: 2012Owner: International Monetary FundLocation: Washington, DC, USABuilding Type: CorporateType: ExtensiveSystem: Single Source ProviderSize: 28374 sq.ft.Slope: 1%Access: Inaccessible, PrivateSubmitted by: Barrett Company

Designers/Manufacturers of Record:Roofing/Waterproofing Consultant: G. Blake Giddens,P.E., Project Engineer, Restoration Engineering, Inc.General Contractor: Jones Long LaSalleWaterproofing & Green­Roofscapes® Supplier &Technical Consultant: Barrett CompanyWaterproofing Applicator: James R. Walls ContractingCo.Landscape Installation: Tilson GroupSoil Supplier: J.K. EnterprisesPre­vegetated Sedum Mats: Moerings SempergreenArchitect for the Project: OPX

The International Monetary Fund, also known as the world’s bank, headquartered in Washington, D.C., has two buildings across the streetfrom one another, Headquarters 1 and Headquarters 2. In 2009, IMF’s Headquarters #2 became LEED Gold certified, and in 2013 HQ2achieved LEED Platinum Existing Building: Operations and Maintenance.

At the HQ2 Building, although the green roof itself is inaccessible, employees and visitors may enjoy the scenic overlook from a patio area withtables and chairs. The existing roofing system was a hot applied rubberized asphalt membrane installed just a few years ago. Realizing thestrong need for green roofs in the Capitol District, the IMF decided to convert the existing ballasted assembly to a green roofing system. Theexisting overburden was removed, the existing membrane was repaired where necessary, a root barrier embedded in new Ram Tough 250rubberized asphalt and the insulation recycled.

In addition, the flashings were also completely redone with Barrett Ram Tough 250 rubberized asphalt. The new and old membrane systemwas covered with a 4 inch deep extensive green roofing system with 5 species of sedum.

At the HQ1 Building there is a 6­story decorative exterior terrace in the center of the building that is covered with decorative stonework andintensive planters. The original waterproofing (dating from the mid 90’s) was a self­adhered sheet membrane product that had deterioratedover the years resulting in numerous leaks.

All of the existing hardscape was carefully measured, catalogued and removed and the entire deck was re­waterproofed with Barrett’s RamTough 250 reinforced system including root barrier, water retention and drainage, new insulation and complimentary hardscape components.Barrett provided a 20 year Vegetative Roofing System warranty for both projects. See the profile of the International Monetary Fund (IMF)HQ #1 in The Greenroof & Greenwall Projects Database.

The installation Contractor, James R. Walls Contracting, has completed a number of significant green roof projects in the Metro D.C. areawith Barrett Greenroof•Roofscapes® systems.

Additional thumbnail photos:

The International Monetary Fund HQ #2 is located at 1900 Pennsylvania Ave. NW, Washington, D.C. 20431; www.imf.org. Learn about theInternational Monetary Fund Roof Replacement from OPX.

The International Monetary Fund HQ #2 is featured in the month of December in The 2014 Greenroofs & Walls of the World™ Calendar.Learn about the following companies in The Greenroof & Greenwall Directory: Barrett Company and Moerings Sempergreen.

SPONSORS:

The Greenroof Projects Database is published, designed, and maintained byGreenroofs.com, LLC, Copyright © 2015. All rights reserved.