Specifications include, but are not limited to: Remove and properly dispose of existing roofing, insulation, and sheet metal down to the existing fluted steel deck on designated roof area. Install two layers of flat‐stock polyisocyanurate insulation board mechanically attached to fluted steel deck. Install tapered polyisocyanurate insulation board set in low‐rise foam adhesive over base layers of insulation. Install gypsum roof cover board in low‐rise foam adhesive. Install two‐ply modified bitumen roof membrane. Install new modified bitumen flashings and sheet metal flashing at rise walls and penetrations. Install new sheet metal edge flashings/fascias along roof perimeters. Install new sheet metal gutters and downspouts at designated locations. Disconnect roof‐top lightning protection system to install new roofing system and re‐install upon completion of new roof system installation. Provide specified contractor and manufacturer warranties. Be aware this is an operational data center. Water and smoke intrusion must be mitigated during replacement of the roofing system.