A Z-closure member for raised seam roofs is formed through bending techniques into a shape having a ventilated central vertical member, an upper mounting flange terminating in an upper tab member, and a lower flange member extending in an opposing direction from the upper mounting flange member and terminating in a flexible locking tab. The lower flange is secured to a raised seam roofing panel with fasteners, while the vent cap formed with a return lip is engaged with the upper flange by capturing the upper flange within the return lip. A fastener can be inserted through the vent cap return lip and the upper flange to secure the vent cap to the Z-closure member. A mesh filter is trapped against the vertical member by the upper tab member and the lower flexible locking tab. A seal can be added to the lower flange to seal against the roofing panel.