Composite roofing shingles are made up of multiple layers. The base of composite roofing shingles consists of a profiled steel sheet that is coated on both sides with a layer of aluminum-zinc and then acrylic primer. Following this, the outer surface of the composite shingle is covered with crushed stone and acrylic glaze. The most common type of composite roofing shingles mimics ceramic tiles, but there are also composite shingles designed to resemble wood, thatch, or natural stone. The advantages of composite roofing shingles include their durability, attractive appearance, and sound insulation.