In contrast to clay and concrete, another great example of natural building material is that of fiberglass. Fiberglass is composed of plasticized polyester and is a great alternative to clay. It has superior thermal and sound insulation properties which make it perfect for floors, walls, and ceilings. However, its greatest advantage compared to clay is that it can be molded into any shape; therefore, it can be used to create any shape of the building or floor.
One of the greatest disadvantages of clay and other natural building materials is that they cannot withstand many types of harsh weather conditions. Especially, frost-free environments are not common in many parts of the world. Although they can tolerate cold temperatures and wind, they can be severely deformed by high altitude winds or flash flood. As a result, they are no longer used today in construction projects due to their susceptibility to damage. However, there are a number of composite materials which can withstand such harsh weather conditions and they are still widely used by builders worldwide.