Metal roof shingles used to be uncommon. Perhaps because these metal shingles can be quite expensive. However, it is now becoming more popular because it is durable and safe. It can also withstand all kinds of weather conditions: rain, hail, strong winds and snow. These shingles are also fire resistant and they are not prone to mildew, rot and insects. Most metal roof shingles are eco-friendly because they contain recycled materials. The most commonly used metals for metal roof shingles are painted aluminum and steel.