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U.S. Treasury Building – Washington DC

The Treasury Building is the oldest departmental building in Washington and has had a great impact on the design of other governmental buildings. At the time of its completion, it was one of the largest office buildings in the world. It served as a barracks for soldiers during the Civil War and as the temporary White House for President Andrew Johnson following the assassination of President Lincoln in 1865. The Treasury Building is unquestionably a monument of continuing architectural and historical significance. In acknowledgment of the building’s significance, it was declared a National Historic Landmark in 1972.

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PROJECT SIZE92,000 square feet
PROJECT LENGTH1996 – 1997
CONTRACTORCitiRoof Corp.
ARCHITECTManuel Sanches, AIA
DECK TYPE/INSULATIONConcrete
INSULATIONPolyisocyanurate
FASTENERSSOPRAFIX®
BASE PLYSOPRALENE® Flam 180
TOP PLYSOPRALENE® Flam 180 FR GR
FLASHING (CAP)SOPRALENE® Flam 250 FR GR


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