Admitted to the Union in the year 1837, Michigan is the 26th state of the United States. It is home to roughly 10,077,331 people, and ranks as the 11th largest state, occupying an area of 250,487 km². The state has two climatic zones, a small southern part that sees a hot summer type climate, and a larger northern part that has short and warm summers with icy, cold winters. The northern part is known for its extreme cold and freezing temperatures, whereas the southern part is known for its susceptibility to thunderstorms and tornadoes. In fact, this region is known to face anywhere between 15 to 20 tornadoes every year.
By far, asphalt is the most commonly used materials for roofing systems, primarily due to its affordability. However, it might not be durable for all types of areas, especially the northern part of the state. In such cases, clay, concrete or even metal roofs tend to be more durable - especially against the bitter cold, and hurricanes and tornadoes. It is common for materials to be used in conjunction in Michigan - for example, many homes use an added layer of rubber insulation.