Component
What Is a Drip Edge?
Also called: drip flashing, eave drip
A drip edge is an angled metal flashing installed along the eaves and rake edges of a roof that directs runoff away from the fascia and underlying wood, into the gutter. It supports the edge of the roof covering and closes the gap where wind-driven water would otherwise wick back.
In plain English
Water running off a roof doesn't fall straight down — surface tension pulls it backward around the edge, onto the wooden trim and the ends of the roof deck. A drip edge is a simple bent-metal strip that breaks that surface tension and throws the water clear, protecting wood that would otherwise stay damp and rot.
How drip edge works
Drip edge profiles (commonly Type C and Type D/"D-metal") run under the underlayment at the eaves and over it at the rakes, lapping shingle-style toward the water flow. The vertical leg covers the fascia gap; the outward kick at its bottom edge — the actual "drip" — separates the water from the building. On metal roof systems, the eave and rake trims perform the same function and are engineered as part of the system's wind-uplift perimeter, where edge securement matters most.
Why it matters for your roof
Edges are where roofs fail first: the perimeter sees the highest wind-uplift forces and constant water exposure. A few dollars of edge metal protects the fascia, sub-fascia, and deck edges — and on re-roofs, missing drip edge is one of the most common inspection findings.
Common problems
Omitted drip edge leads to fascia rot, deck-edge delamination, and water entering behind gutters. Wrong overlap order (over the underlayment at the eave) channels water under the protection layers.
Don't confuse it with
Not to be confused with fascia trim or gutter apron — related edge metals with different jobs.
- Drip edge vs gutter apron (gutter apron has a longer vertical leg into the gutter)
Regional & climate notes
Most relevant in: Rain-heavy climates, Snow-heavy climates.
Frequently Asked Questions
Is drip edge required by code?
Yes — the International Residential Code (R905.2.8.5) requires drip edge at the eaves and rake edges of asphalt-shingle roofs, with specified laps and fastening.
Can drip edge be added to an existing roof?
Yes, but on shingle roofs it involves carefully lifting the first courses; it's easiest done during re-roofing — and a good reason to verify it's in any re-roof quote.
What's the difference between drip edge and gutter apron?
Both are eave metals; a gutter apron has a longer, angled lower leg that reaches into the gutter — preferred where runoff overshoots standard drip edge.
Related terms
See how an Interlock® lifetime aluminum roof handles this — engineered, manufactured, and installed by one company.
Get a Free Quote