Abstract: A roof ventilation system of the type for venting air from under a roof and preventing water, debris and pests from penetrating the ventilation system and entering the interior of the structure is provided. The roof closure vent system includes: a structure having a sloped metal roof having a ridge slot formed along substantially the length of a roof ridge permitting ventilation from the interior under said roof to the exterior; and a ridge closure vent positioned adjacent each longitudinal side of said ridge slot extending substantially along the length thereof fastened between said roof and a ridge panel, in place of the ridge closure vent or in combination therewith is a eave closure vent connected beneath said roof substantially along the length of an eave of said roof.