Fiber Cement Siding 101 Spokane’s Complete Homeowner Guide When you look at a home, the siding does more than cover walls. It protects the structure, it insulates, and it sets the tone for curb appeal. In Spokane and Spokane Valley, where winters are harsh and summers can be dry and hot, siding has to do all of this while standing up to the elements. Fiber cement siding has become a leading option for homeowners who want a mix of durability, style, and value. How Fiber Cement Siding Works Fiber cement siding is a composite material made from cement, sand, water, and cellulose fibers. The mixture is pressed into boards or panels, cured, and then finished to mimic the look of