With 11 manufacturing locations throughout the United States, Insulfoam is one of the largest manufacturers of expanded polystyrene in the country. Commonly used as a rigid plastic foam insulation, expanded polystyrene offers a long-term R-value for applications that include roofing insulation products; wall systems and exterior insulating and finishing systems; perimeter, foundation, underslab and cavity wall insulation; cold storage; garage door insulation; and exterior siding underlayment. Expanded polystyrene can also be used for flotation, packaging, ground stabilization and architectural shapes. Insulfoam s product line includes products such as R-Tech or Total Wall. One of Insulfoam s facilities is located in Mead, Neb.