Abstract: A set of cooperating tools to assist a roofer in the multiple tasks involved in covering a roof surface with shingles or tiles, and numerous other chores associated with wall and roof construction, protection and maintenance. The set includes a straight-edge ruler, shingle and tile cutting jig, workbench, knee-rests, blade knife, gauges, levels and various accessories that can be synergistically combined to accurately and safely measure, cut and install shingles or tiles while standing on a slanted roof surface under precarious conditions.