Specifications include, but are not limited to: Consists of furnishing all labor, materials, equipment and performing all operations in connection with removing and replacing existing roof and skylights per the following Narragansett Bay Commission (NBC) Specifications. Work to be done at Narragansett Bay Commission’s Bucklin Point Wastewater Treatment Facility, Carbon Feed Building, 102 Campbell Ave East Providence, RI.; A. SKYLIGHTS: Replace damaged pressure treated lumber under aluminum skylight curbs, on lower elevation, existing aluminum skylight curbs to remain in place. Install new pressure treated lumber to the outside perimeter of all elevations, height to match the new insulation on outside edge. Remove existing skylight domes that are failing and replace all skylight domes with new opaque double paned domes, to original positions and appearance.; B. ROOFING SYSTEM: 1.) GENERAL Completely remove the existing, ballasted EPDM roof system, from both elevations, down to the bare substrate. Sweep clean and dispose of all debris off site. (Narragansett Bay Commission will keep ballast stone on-site, contractor responsible for moving to designated location.); 2.) PRODUCTS: 2.01 Air/Vapor retarder if specified shall consist of one layer of CertainTeed Base Sheet outlined in the CertainTeed Commercial Roof Systems Specification; 2.02 Insulation: Primary insulation shall be rigid insulation of a suitable type as outlined in the CertainTeed Commercial Systems Specifications Manual conforming to appropriate ASTM standards (ASTM C1289 for polyisocyanurate insulation) set forth by ASTM for its particular type. Insulation shall be mechanically attached (where feasible) or for nonnailable substrates installed in hot asphalt in accordance with the insulation manufacturer’s specifications and NRCA requirements. Insulation type and brand subject to approval by the CertainTeed Corp. as defined in the CertainTeed Commercial Roof Systems Manual.; 2.03 Secondary insulation shall be perlite, fiberglass, rigid wood fiberboard, 1/2” thick high density, or composite polyisocyanurate conforming to ASTM C-208, applied in accordance with manufacturer specifications using hot asphalt. ; 3.) EXECUTION: 3.01 Examination: Verify that all deck and substrate surfaces are acceptable to receive the new roofing system. Deck substrate must be smooth, dry, clean and free from deformities or defects. No excessive deflection or movement shall occur and drainage shall be positive and adequate. Steel decks must be securely fastened as per manufacturer’s specifications and deflection must be less then 1/240th of the clear span under all types of roof traffic/load conditions.; 3.02 Apply air/vapor retarder, outlined in the CertainTeed Commercial Roof Systems Specification applied in accordance with manufacturer specifications. Air/vapor retarder must be continuous at all openings, laps, intersections and perimeters.; 3.02 Primary Insulation: Primary insulation shall be min. 1” thick polyisocyanurate insulation boards conforming to ASTM C1289. Roof insulation shall be applied in accordance with the manufacturer’s specifications for the appropriate deck type, mechanically attached (for nailable substrates) or properly attached using hot asphalt as described in section 2.09 for non-nailable substrates, over appropriate vapor retarder. Install only as much insulation as can be covered by the roofing membrane in a given day. To the gutter, install new, tapered, 1/8” per foot slope poly-isocyanurate insulation, mechanically fastened or properly attached using hot asphalt.
