a method of manufacturing a fiber - reinforced article by providing a foam core made from a polyol containing at least one unsaturated c ═ c group and a hydroxyl functional group . a fiber - reinforcing layer is placed adjacent the foam core . an uncured liquid resin wets the fiber reinforcing layer and the outer surface of the foam core . the resin reacts with the unsaturated c ═ c group of the polyol by a free radical reaction . the resin also cross - links and forms a solid polymer encasing the fiber - reinforcing layer . the resin bonds the fiber - reinforcing layer directly to the foam core . the fiber reinforcing layer , foam core and resin form a composite laminate structure that is stronger and more resistant to delamination because the resin is chemically bonded to the foam core .