Commercial roofs are generally low-pitched roofs that consist of multiple layers of roofing applied with hot roofing asphalt.
Residential roofs are usually steep and the roofing material is mainly asphalt shingles.
Tools used include hatchets, hammers, pry bars, tin snips, knives and chalk lines. Working Conditions Work is done in all weather conditions. Heights and roof structures vary. Roofers must be in good physical condition to lift heavy roofing materials and to perform the work. This work can be seasonal and there are periods of unemployment.