Asphalt roofing is primarily composed of asphalt, a petroleum-based product known for its waterproofing qualities. It typically comes in three main forms asphalt shingles, rolled asphalt, and modified bitumen. Asphalt shingles are the most common type of roofing material used in residential buildings due to their versatility, aesthetic appeal, and ease of installation. Rolled asphalt roofing, on the other hand, is often used for low-slope applications, while modified bitumen offers enhanced durability and flexibility, making it suitable for flat roofs and commercial structures.