A stringerless foam blank for a surfcraft, the foam blank comprising: a top blank face and an opposed bottom blank face ; a pair of shaped rails extending between the opposed top and bottom blank faces at blank face edges; an enclosed core space defined between the opposed top and bottom blank faces and the rails ; a midline axis extending between a nose region and a tail region and which divides the foam blank into two substantially equal regions, each of which extend between the midline axis and the rail on sides respectively thereof; at least one longitudinally extending slotted aperture formed in any one or more of the top blank face , the bottom blank face or the rails , such that the slotted aperture extends into the enclosed core space ; characterised in that , the stringerless foam blank further comprises: at least one non-woven molded unidirectional fiber reinforced flexible spine having a uniform cross-section and bonded to be fixed within the at least one longitudinally extending slotted aperture ;the at least one flexible spine has a flat top side, a flat bottom side and a radiused peripheral side edge joining the top and bottom sides; and the at least one non-woven molded unidirectional fiber reinforced flexible spine is placed in any one or more of the top blank face , the bottom blank face or the rails of the foam blank , providing strength and a customized flex pattern to the foam blank . a top blank face and an opposed bottom blank face ; a pair of shaped rails extending between the opposed top and bottom blank faces at blank face edges; an enclosed core space defined between the opposed top and bottom blank faces and the rails ; a midline axis extending between a nose region and a tail region and which divides the foam blank into two substantially equal regions, each of which extend between the midline axis and the rail on sides respectively thereof; at least one longitudinally extending slotted aperture formed in any one or more of the top blank face , the bottom blank face or the rails , such that the slotted aperture extends into the enclosed core space ; characterised in that , the stringerless foam blank further comprises: at least one non-woven molded unidirectional fiber reinforced flexible spine having a uniform cross-section and bonded to be fixed within the at least one longitudinally extending slotted aperture ;the at least one flexible spine has a flat top side, a flat bottom side and a radiused peripheral side edge joining the top and bottom sides; and the at least one non-woven molded unidirectional fiber reinforced flexible spine is placed in any one or more of the top blank face , the bottom blank face or the rails of the foam blank , providing strength and a customized flex pattern to the foam blank . at least one non-woven molded unidirectional fiber reinforced flexible spine having a uniform cross-section and bonded to be fixed within the at least one longitudinally extending slotted aperture ;the at least one flexible spine has a flat top side, a flat bottom side and a radiused peripheral side edge joining the top and bottom sides; and the at least one non-woven molded unidirectional fiber reinforced flexible spine is placed in any one or more of the top blank face , the bottom blank face or the rails of the foam blank , providing strength and a customized flex pattern to the foam blank . <EOS>