Visual Arts E-Wing Roof Replacement

The Work consists of 1) Replace Roofing Systems Deck 1: a) Demolition: At the areas indicated on the Roof Plan cut 6” wide strips out of the existing adhered areas of the EPDM roof membrane spaced 10’ on center. Remove loose, unadhered wind damaged EPDM membrane. Remove the EPDM flashing systems. Remove any sheet metal flashings and counterflashings as required to install the new roofing. b) Set a layer of 3.0” isocyanurate foam insulation over base layers of insulation. Mechanically fasten the layers of foam and substrate gypsum board simultaneously to the decking with FM Approved screw and plate fasteners. c) A tapered isocyanurate foam insulation system shall then be installed over the base layers of foam insulation. The tapered insulation shall have a factory formed slope of 1/4”/ft (0.25/12). Set the tapered insulation in low rise foam adhesive. d) Set a layer of 1/2” thick manufacturers approved high density isocyanurate foam cover board over the foam insulation in low rise foam adhesive. e) Install a new adhered TPO membrane over the top of the manufacturers approved cover board. f) Install new supported and unsupported TPO flashings. g) Provide new sheet metal flashing and counterflashings. h) Provide a written 20 year warranty covering the new roofing material and labor in a leak free state at a no-dollar limit. Also provide a two year roofing contractor’s warranty covering the new roof system in a leak free state. 2) Replace Roofing Systems Deck 2: a) Demolition: At the areas indicated on the Roof Plan cut 6” wide strips out of the existing EPDM roof membrane spaced 10’ on center. Remove the EPDM flashing systems. Remove any sheet metal flashings and counterflashings as required to install the new roofing. b) Set a layer of 3.0” isocyanurate foam insulation over base layer of existing foam insulation. Mechanically fasten the layers of foam and substrate gypsum board simultaneously to the decking with FM Approved screw and plate fasteners. c) Set a layer of 1/2” thick manufacturers approved high density isocyanurate foam cover board over the foam insulation in low rise foam adhesive. d) Install a new adhered TPO membrane over the top of the manufacturers approved cover board. e) Install new supported and unsupported TPO flashings. f) Provide new sheet metal flashing and counterflashings. g) Provide a written 20 year warranty covering the new roofing material and labor in a leak free state at a no-dollar limit. Also provide a two year roofing contractor’s warranty covering the new roof system in a leak free state.

Division 07 -

Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.