Roof replacement of the T. McLean Administration building, a one-story building constructed in 1973 with an addition added to the north side in 1999, and a later addition added to the south side. The south side roof is not included in this project. The original 1973 building has a low slope roof approximately 12,280 square feet. The roof system consists of metal roof deck, an asphalt vapor retarder, 1.5-inch polyisocyanurate insulation, 0.75-inch fiberboard and a smooth surface built-up roof with an aluminum coating. The 1999 addition has a combination of steep slope metal roof panels and low slope roofing, totaling approximately 7,322 square feet. This will be a total tear-off and replacement of both the original 1973 building and the 1999 addition. New mechanically fastened tapered insulation, coverboard and thermoplastic 80mil PVC membrane are recommended for the new roof system for the original 1973 building. For the 1999 addition, metal roof panels need to be removed to install new roof membrane and replaced with new metal roof panels along with the gutters and downspouts.
