Founded in 1981, Therm-O-Rock West is a fertilizers and farm chemicals manufacturing company. It processes perlite and vermiculite minerals for commercial growers, agricultural companies, building material producers and other industrial manufacturing companies. The company specializes in contract manufacturing and packaging services. It offers ready-made soil blended with perlite, vermiculite, peat and bark. It offers various materials, such as expanded vermiculite, masonry loose-fill insulations, plasters, roof deck mixes and soil conditioners. Additionally, it provides specialty products, custom blended mixes and materials. The company offers packaging, distribution and logistic support services. It is headquartered in Chandler, Ariz.