A screeding machine for screeding an uncured concrete surface includes a wheeled unit having a plurality of wheels for moving the wheeled unit over a support surface. A screed head assembly includes a grade setting device and a vibrating member and is movable over the concrete area via the wheeled unit. The grade setting device includes an at least partially cylindrical concrete engaging surface, such as a roller that is rotatably mounted at the screed head assembly and rotatably driven about its longitudinal axis. The screed head assembly may include a wiper element disposed along the roller and configured to wipe or remove excess concrete from the roller during rotation of the roller about its longitudinal axis. The grade setting device or roller plow assembly may be provided as an aftermarket kit for attachment at a screed head assembly of a screeding machine.