I am a roofer and specialize in roof construction and repair
oh cool. what can you tell me about roofing? i know nothing about it
Mainly a roofer concentrates on applying waterproof and weatherproof materials to the roof
ohh okay.  how long doing roofing take on average?
depends on house size but to roof you have to have basic carpentry skills and decent motor skillls
i see. what else can you tell me about roofing?
slate, single-ply (primarily EPDM rubber, PVC, or TPO), rubber shingles (made from recycled tires), glass, metal panels or shingles, wood shakes or shingles, liquid-applied, hot asphalt/rubber, foam, thatch, and solar tiles. "Living roof" systems, or rooftop landscapes, have become increasingly common in recent years in both residential and commercial applications.
In the United States, regulation of the roofing trade is left up to individual states. Some states leave roofing
Roofer
A roofer, roof mechanic, or roofing contractor is a construction worker who specializes in roof construction. Roofers replace, repair, and install the roofs of buildings, using a variety of materials, including shingles, bitumen, and metal. Roofing work can be physically demanding because it involves heavy lifting, as well as climbing, bending, and kneeling, often in extreme weather conditions.
Throughout the world.
In Australia this type of carpenter is called a "roof carpenter" and the term "roofer"