Powerhouse and Dam Pump Room Roof Replacement, Russel Dam, Elberton, Georgia

The contractor will complete the removal and replacement of the entire existing two-ply Granule surfaced modified bitumen roof system and walking pads on all roof areas of the Powerhouse/Visitor Center Building. The contractor will replace the roof with a new 90-mil 1-ply EPDM roof system complete with associated flashings, insulation, sheet metal components and accessories necessary for a watertight roof system. EPDM shall be white in color to reflect solar radiation. New roof shall provide a minimum R value of R-30. New roof system shall drain naturally into existing drains and not hold standing water. Remove existing roof wall and curb flashings. Remove existing EPDM on all parapet walls. Install new ½” heavy duty cover board on both the horizontal and vertical surfaces of all parapet walls of Powerhouse Roof. New 60-mil white EPDM will be installed over the cover boards with bonding adhesive. Walkboards/Walkpads shall be included and will match existing powerhouse layouts around HVAC units, exhaust fans, upstream and downstream parapet wall, ladder crossovers, and roof access hatch. EPDM walkway pads or equivalent shall be used. Walkboards/walkpads shall also be white in color if available. The contractor shall remove and replace the entire existing insulated tar and gravel built-up roof systems on concrete deck on dam pump room. Remove existing pump room roof wall and curb flashings. Remove existing roofing of all parapet walls. Install new ½” HD cover board on both the horizontal and vertical surfaces of the parapet walls of Dam Pump Roof area. New 60-mil white EPDM will be installed over the cover boards with bonding adhesive. Replacement with a new 90-mil 1-ply EPDM complete with associated flashings, insulation, sheet metal components and accessories necessary for a watertight roof system. EPDM shall be white in color to reflect solar radiation. New roof shall provide a minimum R value of R-30. New roof system shall drain naturally into existing drains and not hold standing water. Walkboards/walkpads shall be installed on Dam Pump Roof from the East side of the roof around exhaust fan. White EPDM walkway pads or equivalent shall be used. Walkboards/walkpads shall also be white in color if available.

Division 07 -

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