Drip edge is an L-shaped metal flashing installed along the edges of a roof - at the eaves and rakes - that directs water away from the fascia board and into the gutters. It is one of the most basic yet essential components of a properly installed roofing system.
What Does Drip Edge Do?
Without drip edge, water running off the roof can work its way behind the gutters and saturate the fascia, soffit, and even the roof decking. Over time, this leads to:
- •Wood rot in fascia boards
- •Soffit deterioration
- •Deck board damage at the roof edge
- •Foundation issues from improper water runoff
- •Gutter failure as water bypasses the system
A properly installed drip edge ensures water is cleanly channeled into the gutter system, protecting the structural components at the roof edge.
Drip Edge and Building Code
As of 2012, the International Residential Code (IRC) requires drip edge on all new roof installations. Massachusetts and Rhode Island have adopted this requirement. During a roof replacement, Roofing Doctors always installs new drip edge as part of the project - using the existing old drip edge (common in unscrupulous "contractor" work) is a code violation and a warranty issue.
Types of Drip Edge
Type C (Standard L-Shape)
The most common profile - a simple 90-degree bend with a small bottom leg. Works well for most standard installations.
Type D (T-Style)
Has an additional horizontal leg at the bottom that projects further from the fascia, providing better protection for wider fascia boards and ensuring water clears the gutter edge.
Type F (Gutter Apron)
A wider profile designed for use where the gutters attach directly to the fascia. The extended horizontal leg bridges from the roof deck over the gutter.
Drip Edge Installation: Eaves vs. Rakes
The installation sequence differs depending on location:
**At the eaves (bottom edge):**
Drip edge is installed directly on the roof deck before the underlayment. This allows water to drain over the drip edge and into the gutter.
**At the rakes (sloped sides):**
Drip edge is installed on top of the underlayment. This allows water that runs down the underlayment to be caught by the drip edge and directed away from the fascia.
Getting this sequence correct is critical - reversed installation at the eaves or rakes will channel water behind the drip edge rather than away from the building.
Common Drip Edge Materials
- •**Aluminum** - Lightweight, rust-resistant, most common choice. Available in standard colors.
- •**Galvanized steel** - Heavier and more rigid than aluminum. Suitable for high-wind areas.
- •**Copper** - Premium choice that matches copper gutters and flashings. Naturally antimicrobial.
Signs of Drip Edge Problems
- •Fascia boards showing signs of rot or darkening at the top edge
- •Water dripping behind gutters during rain
- •Gutters pulling away from the fascia
- •Missing or bent metal visible at the roof edge
- •Staining on the soffit below the gutter line
What to Look For on Your Estimate
When reviewing a roof replacement proposal, confirm:
- •New drip edge is included (not reuse of old material)
- •Correct profile for your gutter and fascia configuration
- •Proper installation sequence (eaves before underlayment, rakes after)
Roofing Doctors includes new, code-compliant drip edge on every roof replacement in Massachusetts and Rhode Island.