Education: No degree, certificate or diploma. Work site environment: Noisy. Dusty. Tasks: Install or replace asphalt shingles, wood shingles and shakes and masonry or baked clay roofing tiles on sloped roofs of buildings. Supervise other workers. Apply waterproof coatings to concrete or other masonry surfaces below or above ground level. Install and repair metal roofs using hand and power tools. Install sheet metal flashings. Estimate costs and materials. Erect and install scaffolding, falsework and other working platforms. Read and interpret blueprints, maps, drawings and specifications. Weight handling: Up to 23 kg (50 lbs). Experience: 2 years to less than 3 years.