Main Roof Replacement

The General Services Administration (GSA), Region 05, is seeking a qualified General Contractor (GC) for the Main Roof Replacement Project at the John W. Peck Federal Building in Cincinnati, Ohio. SCOPE OF WORK but is not limited to: The purpose of this project is to replace the existing lower main roof of the John Weld Peck Federal Building in Cincinnati. The existing construction of this building is a concrete and steel frame with stone and glass cladding and was built in 1961. The existing main roof structure, as noted in the existing drawings supplied bythe GSA, is a 17-inch deep, concrete waffle deck bearing on concrete wrapped, steel columns. The existing roof system that is being replaced is 32,456 S.F and is approximately seven years old. Test cuts of the existing roof revealed a 2-ply modified bitumen roof over a gypsum cover board over polyisocyanurate insulation with felt facers. This top roof assembly had been installed over a 3-ply built up asphalt roof system over a base sheet mopped over the concrete roof deck. The modified bitumen cap sheet is showing signs of granule based deterioration. The edges of the cap sheet are curling and splitting and the field of the roof is ponding water in several locations. It is the intention of the project to replace all the existing roof drains with new cast iron roof drains and match the roof system of the recently replace upper penthouse roof. This system is a 2-ply, cold applied SBS modified bitumen roof over a gypsum cover board over polyisocyanurate insulation over a temporary roof. In order to simplify maintenance and create a single source for warranty purposes, the recommended manufacturer of the main roof system is Siplast. In addition, the roof slope would be increased to ¼ inch per foot to improve roof drainage.

Division 07 -

Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.