Admitted to the Union in the year 1889, Washington is the 42nd state of the United States. It is home to roughly 7,887,965 people, and ranks as the 18th largest state, occupying an area of 184,827 km2. Lying in the pacific northwest, the climate in Washington is influenced mainly by the combination of the north Pacific Ocean's low- and high-pressure systems, the North American air currents, the Cascade and Olympic mountain ranges. There are two distinct climate zones in the state - the west of the Cascades (which have mild summers and moderate winters), and the east of the Cascades, which have warmer summers and colder winters.
The weather in Washington is harsh, and therefore any property owner looking for a roof must make sure that it can battle weather extremes while sustaining minimum possible damage. In terms of style, people mostly opt between gable and hip roofs and their variations. Flat roofs, while present, are few and far between. In terms of materials, composition shingles enjoy the most popularity, as they are tough yet cheap to build, install and maintain. They do, however, need regular maintenance, as they are porous, and if left unchecked, can be a harbinger of fungus and mold. Metal, shakes and slate are also used. In recent years, stone coatings have gained popularity, and they can offer great resistance while not adding excessive weight.