Roofers waterproof and weatherproof buildings. They apply shingles made from fiberglass, slate, tile, and cedar, or composite material such as felt rubber membrane. They also built-up rubber, pvc, and modern bitumen.
Roofers work outdoors in all kinds of weather and shut down only when weather is severe. Craftsmen do a great deal of climbing, kneeling, standing, and walking. Persons interested in becoming a roofer must have no fear of heights, a good sense of balance, and be keenly aware of safety for themselves and their coworkers.