Removal and disposal of all existing asphalt built-up roof system, metal flashings, and counter flashings. Existing metal wall panels and balustrades are to remain. Furnish and install new single ply PVC roof system consisting of new flat and tapered polyisocyanurate insulation, gypsum cover board, fully adhered 50 mil PVC membrane and all flashings, wood blocking and metal flashings. Furnish and install new liquid applied drain re-lining at two (2) existing overflow drains and drain leaders. Remove and reinstall all existing surveillance and electrical equipment needed to complete the reroofing work.  All disturbed rooftop equipment is be returned to original functionality after completion of the roofing project. Removal and disposal of all existing asphalt built-up roof system, metal flashings, counter flashings, gutters and downspouts. Furnish and install new single ply PVC roof system consisting of new flat and tapered polyisocyanurate insulation, gypsum cover board, fully adhered 60 mil PVC membrane and all flashings, wood blocking, metal flashings, gutters and downspouts. Remove existing metal roof panels in a manner that will allow for re- installation without damage. Install new high-temperature underlayment and re-install existing metal roof panels. Incorporate metal roof panels into above and below single ply roofing systems.