Insulated Door Systems, specializes in the design, manufacture and installation of: Cold & Freezer Rooms, Controlled Atmosphere Rooms, Poultry Breeding Rooms, Industrial Warehousing and Insulation of Refrigerated vehicles. Complete panel buildings are designed in-house in consultation with our clients, to ensure that they meet their exact requirements. Industrial Warehousing Insulation of Refrigerated vehiclesWe also produce Polystyrene insulation in our own in-house company ; Independent Polystyrene Manufacturers (IPM) .