A recycling system was developed for the treatment of fiber-reinforced plastics (FRP) by superheated steam. The process was shown to be robust, coping with scrap of FRP and providing useful outputs in the form of recovered fibers and resin. In this study, glass FRP (GFRP) was decomposed at a chamber temperature above 370°C. Fibers were collected at purities of up to 80%. The tensile strength of recovered glass fibers was reduced by up to 50% although this depended on the temperature of treatment. Resin was separated from the gas stream by cooling it to liquefaction temperature of resin.