Abstract: An improved spacing and positioning tool is provided for facilitating spacing and positioning of parallel spaced apart construction materials. The tool allows for the installation of aligned parallel spaced apart materials in either of a first or second preferred orientation thereof. Preferably, the tool is used in a set of two, which are placed proximate opposed ends of the materials being spaced, to ensure correct spacing and positioning of the workpiece materials along the length thereof. The tool includes a spacer body with a plurality of evenly spaced apart rectangular cutouts formed in a front edge thereof. The sides of the rectangular cutouts are substantially transverse to a plane defined by the front edge of the spacer body. The back edge of the spacer body has a plurality of evenly spaced apart substantially V-shaped cutouts formed therein.