Polyiso Insulation is a closed-cell, rigid foam board insulation used primarily in retail buildings, health facilities, warehouses, offices, industrial manufacturing facilities, and educational institutions. Polyiso is the product of choice for energy-conscious consumers who are looking to reduce energy consumption and costs, because of its high thermal performance. Polyiso insulation offers the highest level of thermal performance of any rigid foam insulation on the market, providing design flexibility while remaining energy-efficient, cost-effective and environmentally responsible. Polyiso is one of the most widely-used and cost-effective insulation products and has been promoted by the U.S. Environmental Protection Agency for its responsible impact on the environment.