Abstract: An apparatus for seaming roofing membranes to one another, wherein one of the membranes is secured to an underlying support structure by at least one protruding fastener, the apparatus including a wheeled carriage having an upwardly extending push/pull bar, a power supply carried by the carriage, the power supply driving the wheeled carriage, a heating assembly carried by the carriage and powered by the power supply, the heating assembly including a fan and a heating element, wherein the fan blows ambient air over the heating element and generate a heated airflow sufficient to fuse the roofing membranes to one another, a nozzle coupled to the heating assembly for directing the heated airflow between the two membranes, the nozzle having a pair of outer channels and an elevated center channel disposed between the pair of outer channels, the elevated channel passing over the at least one protruding fastener, and a variable pressure roller assembly coupled to the carriage, the roller assembly having a pair of out

Abstract: A method for constructing a ballasted roof system (20) includes the steps of installing a roofing membrane (14) onto a roof structure (12). A ballast (16, 32) is disposed on the roofing membrane, wherein the ballast has applied thereto a reflective paint (21) to improve the solar reflective properties of the ballasted roof system. The improved roofing system has solar reflective properties at least 35%.