A. The roof replacement Work includes the removal of the existing roof systems along with the corresponding flashings and existing insulations as outlined in detail below. The Work includes the installation of a new single ply PVC/KEE membrane roof system, corresponding flashing, roof insulation and drainage accessories. B. All necessary precautions shall be taken during construction to protect the existing roof systems on adjacent roof areas which shall remain. No material or debris shall be stored or transferred over any of the roof areas not included in the project. C. Maintain the building in watertight condition throughout this Contract. Do not permit water to build up on the roof. Provide power hook-ups and pumps on the roof to remove rain that occurs before slopes to drains are achieved. Interior of building to be kept free of water entry of ANY amount throughout the entire roof replacement process. 1. The roofing over each roof area shall be placed so as to have no more roof area open and/or under construction than can be made watertight at the end of each workday. D. Existing Roof System Compositions: Note: It is the roofing contractor’s sole responsibility to field verify all existing conditions prior to submitting their bid. Roof Area A, (16,576 SF +/-) Painted (Type N) metal deck 2-ply fiberglass felt 2.5-Inch Polyurethane Insulation 3/4-Inch Perlite Insulation 3-4-ply Fiberglass Felts Gravel Surfacing D. New Roof System Compositions: Note: It is the contractor’s responsibility to verify that the proposed roof system composition meets the manufacturers’ and building code requirements prior to submitting their bid. Roof Areas A (16,576 SF +/-) Existing - Painted (Type-N) metal deck (repaired or replaced as required) New 4-Inch Polyisocyanurate Insulation (mechanically attached) New 1/4-In.:1’ Tapered Polyisocyanurate Insulation (adhered – LRF insulation adhesive) New 1/2-In.:1’ Tapered Polyisocyanurate Crickets (adhered – LRF insulation adhesive) New 1/2-inch HD (80 PSI) Polyisocyanurate (adhered – LRF insulation adhesive) New 60 mil PVC / KEE Single Ply Membrane (fully adhered)
