Profile: Boulder Developments Ltd. is a manufacturer of multi-layered foil insulation. Multi-layered foil insulation is a high tech insulator that provides effective and efficient insulation against all types of heat transfer, including insulating against conductive, convective, and by acting as a radiant barrier, helping to reduce heat loss through floors, walls, & roof / loft. Foil insulation works by combining multiple layers of thin reflective foil, between thermo foam and wadding layers. By bonding these together, the resultant insulation is thin, lightweight and flexible making it quick and easy to install. SuperFOIL SF19 consists of 19 layers of reflective foil, with thermo foam separation layers. SF19 is only 38 mm thick, yet achieves performance up to 275 mm of glass wool when its radiant reflective properties are incorporated (comparative in-situ energy saving assessment).