Petersen Mansard Roof Tops New Landmark in Washington, D.C.

July 6, 2006

The new Mandarin Oriental Hotel in Washington, D.C., offers a dramatic entry to the capitol for those traveling across the 14th Street Bridge. Located in The Portals district, the hotel provides views of the tidal basin, the U.S. Capitol Building and other city landmarks. The Portals, a $1-billion, mixed-use development, is the largest project in the history of Washington, D.C.

The Mandarin Oriental Hotel is topped with a striking mansard roof utilizing 20,000 square feet of PAC-CLAD® 24-gauge steel Redi-Roof batten curved and straight panels finished in Hemlock Green.

Brennan Beer Gorman Monk Architects of Washington, D.C., designed the 400-room, 5-star hotel. Owned by Republic Properties Corp., the hotel was completed and opened in March 2004.

The signature Petersen roofline tops a layering of beige masonry façade embellishments including towers, columns, cornices, and ornate windows. Projecting bays and portal windows complement the materials and color palette common to the overall Portals development plan.

Installation of the roof was done by Progressive Services Inc., Dover, PA. “The high, nearly-vertical work was a challenge,” explains Rick McClearey, job foreman. “And, there was an extreme number of radiuses. Virtually every window had a radius at the top, plus there were numerous porthole windows. Everything had to be notched or segmented to make the radiuses work out.”

The Redi-Roof panels were manufactured at Petersen’s plant in Annapolis Junction, MD. “The vast majority of the panels were produced with at least a slight radius and shipped ready for installation at the site,” says Derek Lindeberg, regional manager. “The mansard roof provides a great accent for the hotel and fits the style of many buildings in D.C.”

Progressive Services also utilized PAC-CLAD flat sheet material to create the elaborate coping and soffits. “We brought a portable break to the site for some of the fabrication but the majority was done back at our shop,” says McClearey. “The job worked out great. We’ve always had good experience with Petersen.”

Progressive Services Owner Larry Toot concurs: “We always use Petersen when their panels are suitable. They’re good people and have good products.”

General contractor for the project was Armada/Hoffler Construction Co., Virginia Beach, VA.

Produced in factory formed lengths up to 55 feet, Petersen’s PAC-CLAD Panels are Herr-Voss corrective leveled to provide superior flatness. Longer lengths are available by consulting the factory. All are available in 42 standard colors on steel and 37 standard colors on aluminum. For more information on the complete line of Petersen metal roofing products, call (800) PAC-CLAD or visit (

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