Specifications include, but are not limited to: Remove existing roof; including the gravel, EPDM, flashing, and sheet metal. Haul off site for disposal. Required dumpsters and hauling are the responsibility of the Contractor. Review existing insulation. Existing insulation is assumed to be 2.75” EPS and 0.5” perlite insulation. Remove and replace damaged/wet insulation per provided labor and material rate included in Form D – Cost Proposal. Install new layer of 3” polyisocyanurate insulation with an R value of at least 17.4 to provide a total R value of R-Value=30. Install new EPDM over insulation. Flash all existing walls and penetrations. Assume 15 penetrations of various sizes, including the roof hatch. Existing top equipment curbs and connected piping for units AC-2 and AC-3 will be raised by the Mechanical Contractor, awarded through a separate RFB. The remaining existing equipment and piping must be remain in place and be incorporated into the roofing system. Fully Adhered or Ballasted roofing systems will be accepted. Bid will be awarded to lowest complete bid. Specification 07 53 23 includes qualifications of fully adhered system. If ballasted, install new gravel at 12 lbs/SF. Furnish and install new pre-finished 24 ga. sheet metal coping, roof edge, and counter flashing to replace existing.
