List of commercially available roofing material
（重定向自Roofing）
Roofing material is the outermost layer on the roof of a building, sometimes self-supporting, but generally supported by an underlying structure. A building's roofing material provides shelter from the natural elements. The outer layer of a roof shows great variation dependent upon availability of material, and the nature of the supporting structure. Those types of roofing material which are commercially available range from natural products such as thatch and slate to commercially produced products such as tiles and polycarbonate sheeting. Roofing materials may be placed on top of a secondary water-resistant material called underlayment. Roofing is an Industry where you work on roofs. This Industry is a high risk industry due to the injuries that you can sustain in this job environment. Roofing is focus on the upper layer of a house or building. Roofing on a house is considered residential and building are commercial. Roofing on a government building you get paid pavilion wage.