Education: Secondary (high) school graduation certificate. Tasks: Install built-up roofing systems using materials such as asphalt saturated felts and hot asphalt and gravel. Install roofing tiles on sloped roofs of buildings. Install single-ply roofing system using waterproof sheet materials, such as modified plastics, elastomeric or other asphaltic compositions. Read blueprints, drawings and specifications to determine work requirements . Repair or replace single-ply roofing systems. Repair roofing systems. 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. Estimate costs and materials. Employment terms options: Early morning. Evening. Experience: 2 years to less than 3 years. Employment terms options: Morning. Day.