Embodiments of the invention relate to an attachment for a pressure washer to facilitate cleaning of secondary surfaces. The attachment includes a body with three walls, two of the walls are in a parallel relationship and a third wall is substantially perpendicular to the two parallel walls. A single rolling element is in communication with the two parallel walls and spaced apart from the third wall. The single rolling element may be applied to a secondary surface so that the attachment rolls along the surface thereof while liquid is ejected from the pressure washer to clean the secondary surface.