What is a ridge vent closure for a metal roof?
Short answer. A ridge vent closure is a profile-matched strip, usually foam, rigid plastic or mesh, that fills the gaps between the metal panel ribs and the ridge cap while still letting air pass through. Vented closures let attic air escape at the ridge, and solid closures seal the ridge completely where the space below should not vent there.
Why metal ridges need closures
Metal panels have raised ribs or seams, so a ridge cap laid across them leaves an open gap at every rib. Without a closure, wind-driven rain, wasps, birds and leaves get straight into the attic. Shingle roofs solve this with the vent mat itself; metal roofs need closures matched to the panel shape.
Types
- Solid foam closures: cut to the panel profile, used where the ridge should not breathe, such as over a conditioned attic or a porch.
- Vented foam or mesh closures: the same profile with an open cell or mesh structure that allows airflow. Net free area per linear foot varies by product.
- Universal rolled closures: a flexible mesh roll with adhesive or butyl edges that conforms to different profiles, common on standing seam.
Installation points that matter
- The deck slot under the ridge is cut much like a shingle ridge vent slot, stopping short of the ends.
- Closures are set on the panels with butyl tape, and the ridge cap fastens per the panel maker's detail.
- Exposed fastener panels need screws with sealing washers placed on the rib or flat as specified.
- Solid closures installed where vented ones belong leave the attic with no exhaust, so check which kind is on your roof if the attic runs hot.
Georgia considerations
Summer thunderstorms push rain sideways, and pollen and pine debris can mat on mesh closures over time, so the ridge on a metal roof deserves a look during routine checks. See metal roofing in Georgia and the roof maintenance checklist.