Specifications include, but are not limited to: INSULATION INSTALLATION - A. Substrate board must be clean, dry, smooth, free of sharp edges, fins loose or foreign materials, oil, and grease. B. Comply with roofing system manufacturer's written instructions for installing roof insulation. D. Install insulation with long joints of insulation in a continuous straight line with end joints staggered between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4 inch with insulation. 1. Cut and fit insulation within 1/4 inch of nailers, projections, and penetrations. E. Install one or more layers of insulation under area of roofing to achieve required thickness. Where overall insulation thickness exceeds NRCA recommendations for a single layer or greater, install 2 or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches150 mm in each direction. F. Trim surface of insulation where necessary at roof drains so completed surface is flush and does not restrict flow of water. G. Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces. H. Adhered Insulation: Install each layer of insulation and adhere to substrate as follows: 1. Set each layer of insulation in a cold fluid-applied adhesive. I. Install cover (barrier) boards over insulation with long joints in continuous straight lines with end joints staggered between rows. Stagger joints from joints in insulation below a minimum of 6 inches150 mm in each direction. Loosely butt cover (barrier) boards together and fasten to roof deck. Tape joints if required by roofing system manufacturer. 1. Fasten to resist uplift pressure at corners, perimeter, and field of roof. 2. Apply adhesive to underside and immediately bond barrier board to substrate. ROOFING MEMBRANE INSTALLATION, GENERAL - A. Install roofing membrane system according to roofing system manufacturer's written instructions and manufacturer’s FM Global class approved assembly meeting performance requirements of this section. B. Start installation of roofing membrane in presence of roofing system manufacturer's technical personnel. C. Coordinate installing roofing system so insulation and other components of the roofing membrane system not permanently exposed are not subjected to precipitation or left uncovered at the end of the workday or when rain is forecast. 1. Provide tie-offs at end of each day's work to cover exposed roofing membrane sheets and insulation with membrane with joints and edges sealed. 2. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system. 3. Remove and discard temporary seals before beginning work on adjoining roofing...