Panels stop short of the ridge, closures fill the profile gaps, and a formed cap is fastened over the top to span both slopes. Where the attic is ventilated, a vented closure or ridge vent sits under the cap so air can leave while water cannot get in.
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More than people expect, and each piece has a job.
| Component | Purpose |
|---|---|
| Panel end | Cut and often hemmed or turned up |
| Inside closure | Fills the profile gap against wind driven rain |
| Vented closure or ridge vent | Lets attic air out while blocking water |
| Sealant tape | Backup seal behind the closure |
| Ridge cap | The formed cover spanning both slopes |
Three things, in order of how often they appear.
The second is the quiet one. A sealed ridge on an attic with intake at the eaves traps moisture and shortens the life of the deck. A re-roof is the moment to get ventilation right. what the components are called covers the assembly and how installed prices are built up covers what it adds.
Not every one, but any ventilated attic needs balanced intake and exhaust. A re-roof is the natural moment to correct ventilation that never worked.
Usually profiled foam matched to the panel, or formed metal. Both fill the gap the ribbed profile leaves at the ridge and eave.
Yes, and it is sometimes done deliberately as an accent. It is a decision to make before ordering rather than on the day.
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