Abstract: A roof ridge ventilator system of the type adapted to be installed on the open ridge of a building's roof. The ventilator system is provided in at least two elongated sections having ends with top parts which are joinable together endwise. The top part of one end is fabricated to enable overlapping by the top part of an unfabricated end of another section of roof ridge ventilator. The overlapping inhibits migration of water between the overlapped ends. The fabricated top part is further provided with a capillary groove in its outer surface which also is to be overlapped by the unfabricated end of the other ventilator section when the ends are joined. The groove is located, sized and configured to (1) collect water attempting to enter the ridge vent opening by migrating between the overlapping ends, and (2) dispose of said water collecting in said groove to minimize the possibility of said water entering the ridge vent opening.