Drip Edge
Also called: edge metal, drip edge flashing
Drip Edge is the metal flashing fitted along the eaves and rakes to carry water off the roof edge and away from the fascia and decking. It is inexpensive, it is required by code in most places on new work, and it is one of the most commonly omitted line items on a roof estimate.
What it means
Drip edge is a formed metal strip fitted along the edges of the roof, at the eaves and up the rakes. It projects slightly beyond the fascia and turns downward, so water running off the roof drops clear rather than curling back underneath.
It is fitted under the underlayment at the rakes and typically over it at the eaves, and it works with the gutter to direct water where it is meant to go.
Why such a small component matters
Because of what water does at an unprotected edge.
Water has a tendency to cling to a surface it is running along and follow it around a corner rather than falling cleanly off. At a roof edge without drip edge, water running off the last shingle tracks back under it, onto the exposed edge of the decking and down the face of the fascia.
The result over years is a rotted fascia board and deteriorated decking around the entire perimeter of the roof, which is expensive, structural, and entirely avoidable by a strip of formed metal.
It also serves a mechanical purpose: it supports the shingle overhang at the edge, keeping it from drooping and cracking, and it gives the perimeter a defined line.
Why it is missing so often
Two reasons, and it is worth distinguishing them.
Older roofs frequently have none because they were built before it was required. Requirements have tightened over time, and a roof from an earlier era can be perfectly sound and simply predate the standard.
On estimates, it goes missing because it is cheap and easy to overlook. It is a minor line item on a large document and it does not draw attention. Where a full replacement scope has no edge metal on it, that is worth raising specifically.
The repair-versus-replacement distinction applies here as elsewhere. A repair to a few shingles in the middle of a slope does not involve the edges. A full replacement does.
The code question
Drip edge is required for new roof installation in most jurisdictions, with local variation in the details of material, dimension, and installation method. The local building authority is the authority on its own requirements.
Where the existing roof has none and code now requires it, the same ordinance or law question arises as with any other code-driven upgrade: the contractor has to install it, and whether the carrier pays for that increment depends on the policy.
Given how inexpensive it is, this rarely becomes a serious dispute. It is worth getting right for the sake of the roof rather than the argument.
Common mistakes
Omitting it from a replacement scope is the main one.
The second is fitting it in the wrong relationship to the underlayment, which defeats much of its purpose.
The third is treating it as optional trim. It is a functional component protecting the structural edge of the roof.
On the call
Drip edge is small money and a frequent omission, so it is worth checking on any estimate comparison. A homeowner who cannot understand why two quotes differ is often looking at a scope that includes edge metal and one that does not.
This is how our agents handle it on storm appointment calls and day-to-day roofing answering service intake.
Questions people ask about drip edge
- What happens to a roof without drip edge?
- Water running off the edge tends to cling to the underside of the shingle and track back onto the fascia and the deck edge rather than dropping clear into the gutter. Over time that produces rotted fascia and deteriorated decking along the perimeter.
- Is drip edge required by code?
- It is required for new roof installations in most jurisdictions, though requirements and details vary locally and the local building authority is the authority on its own code. Older roofs frequently have none, having been built before the requirement existed.
- Why is it missing from the insurance estimate?
- Sometimes because the scope is a repair rather than a replacement, and sometimes because it was simply overlooked. It is a small enough item that it is easy to miss, and it is worth raising specifically rather than assuming it is included.
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