Shingles are the most common roofing material in North America, and they’re commonly made out of asphalt. Each roofing shingle is small and rectangular. When installed, they overlap to keep out water. Asphalt is used because of its waterproof properties. They’re popular because the up-front cost is relatively low, and the installation itself is easy and straightforward for professional roofers. When homeowners on a budget compare tile roofs vs. shingle roofs, they often choose shingles because of the price.