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 (23, 24) extending between the opposed top and bottom blank faces (21, 22) at blank face edges; an enclosed core space defined between the opposed top and bottom blank faces (21, 22) and the rails (23, 24); 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 (23, 24) 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 (23, 24), 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 (23, 24) 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 (23, 24) extending between the opposed top and bottom blank faces (21, 22) at blank face edges; an enclosed core space defined between the opposed top and bottom blank faces (21, 22) and the rails (23, 24); 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 (23, 24) 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 (23, 24), 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 (23, 24) 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 (23, 24) of the foam blank, providing strength and a customized flex pattern to the foam blank.