A cedar shake roof gives your home a more rustic look. Cedar shakes are a natural roofing material harvested from cedar trees. Although shakes are made from wood, they generally have a longer life expectancy than the standard asphalt shingle, as much as 30 years with proper care and maintenance. Standard cedar shingles have natural oil in them that prevent rot and decay, however, you can purchase cedar shakes that have been treated, offering added protection and life.