Panels can be installed using screws for fast installation. Molds are made from actual stone so each panel is fully textured and produced with rich colors giving the appearance of real stone. Samples can be purchased from the NextStone website. Manufactured with specially formulated polyurethane and combined with fire retardants and UV inhibitors, NextStone insulated stone siding panels and accessories are cast from actual stone and rock patterns. Developed in 1997, the panels hold a US design patent and the unique manufacturing process gives NextStone products the most authentic faux stone siding look on the market today. NextStone siding panels can be easily installed at home with no formal training. The innovative panel has been designed to rid the need to hire masonry installers, professional siding installers or skilled laborers. Each of the easily managed, light-weight panels only weighs about 1 lbs. per sq. ft. removing the need to pay for additional materials, equipment or labor. NextStone manufactures a quality exterior building product and can also be used as an interior decorative wall panel.