Install and repair metal roofs using hand power tools
Install, repair or replace built-up roofing systems using materials auch as asphalt saturated felts and hot asphalt and gravel
Install, repair or replace shingles, shakes and other roofing tiles on sloped roofs of buildings
Install, repair or replace single ply roofing systems using waterproof sheet materials such as modified plastics, elastomeric or other asphlatic compositions