PENTAGON WEDGES 3-5 SLATE ROOF REPLACEMENT

Project Owner:  U.S. Department of Defense

• Seal Engineering, Inc., was responsible for the design of the slate roofing reconstruction, including built-in and hanging gutters and associated sheet metal flashing and trim, and served as a technical consultant for the CM team
• The project consisted of removing slate shingles, sheathing, sleepers, and roofing membrane down to the structural concrete deck
• Prepared the deck surface and installed rubberized asphalt sheet membrane, sleepers, sheathing, felt underlayment, and a mix of salvaged and new slate shingles
• The project also included installation of copper/slate ridge vent assemblies, fall protection systems, and periodic firebreaks
• The original budget of $12.2 million was increased by approximately $100,000 to allow for concealed localized substrate issues
• Seal Engineering, Inc. also provided the design of the slate and flat roof repair for the entire building in the early 1990s, partial replacement design following 9/11, and development of RFP criteria for replacing flat & slate roofs under a five-year term contract from FY 2005 – FY 2009 and a one-year MACC contract for FY 2010