Abstract: A method and a serrated hand tool for construction are disclosed. A novel hand tool for plaster application over a taped surface joined includes a blade having a central section and two serrated side sections. The central section contains a cutout with a straight edge of sufficient width to allow a thicker layer of plaster to be placed over the tape. The serrated side sections contain a number of teeth with a triangular shape. According to the method, the plaster is applied in a plurality of parallel lines under the side sections and in a smooth straight layer under the central section of the tool all at one time to reduce the overall construction time, plaster consumption, and the skill level required to perform the task.