The 1001 G Street complex is a 12-story commercial office building located above the Metro Center station in downtown DC. The complex consists of two sections: the McClachen Building, which is a historic nine-story structure and the West Building, which was constructed in 1987. Although both buildings are connected, the main roof elevations of the two buildings differ significantly. The combined roof plate is approximately 34,000 sf. The original roofing membrane over the West Building was a loosely laid EPDM rubber membrane overlaid with stone ballast in an IRMA configuration, while the roofing system on the McClachen Building consisted of multiple layers of pitch and roofing felt.
The project scope included the removal of the existing roofing systems and replacement with a 20-year, two-ply SBS system, design and replacement of air handling ducts, and patching of deteriorated concrete on the McClachen roof structure. Additional consulting services offered include: an existing condition evaluation report, preparation of budget estimates for roof covering replacement, preparation of construction documents, bidding, negotiation and contract award process assistance, and construction administration services during execution of the work.