Abstract: At approximately 12:25 p.m. on September 20, 2008, Employee #1 was working on the flat roof of a commercial building, which was approximately, 6000 square ft. The employee was working with coworkers, spraying a foam coating on the roof parapet which was approximately 2-ft high. The employee was standing at the edge of the roof holding a 4-ft x 4-ft piece of rigid foam insulation, which was being used to block the sprayed foam from going over the roof edge. He was near the corner of the building. He stepped backwards; he tripped over the parapet and fell 25 ft. Employee #1 was killed. The employee had not been provided with fall protection.