What are typical drip edge dimensions?
Short answer. Most residential drip edge comes in 10-foot lengths, with a roof flange of roughly 2 to 4 inches and a face, or fascia leg, of about 1 1/2 to 3 inches, often with a small outward kick at the bottom. The code sets the minimums: at least 2 inches onto the deck, at least 1/4 inch below the sheathing, and 2-inch laps between pieces.
The common profiles
- L-style (often called Type C). A simple right-angle bend, commonly around 2 inches on each leg. Used on rakes and on eaves without much gutter concern.
- T-style (often called Type D). A roof flange, a vertical face, and a short kick that angles out at the bottom so water drips away from the fascia. The most common eave profile on Georgia homes.
- Extended or long-leg profiles. Faces of 2 1/2 inches or more for thick deck edges, low fascia, or re-roofs where the edge sits higher than usual.
- Gutter apron. A longer, flatter leg meant to reach down into the gutter rather than drip in front of the fascia.
Code minimums that apply to every profile
- Required at eaves and rakes of shingle roofs.
- Extend at least 2 inches back onto the roof deck.
- Extend at least 1/4 inch below the roof sheathing.
- Overlap adjacent pieces at least 2 inches.
- Fasten at no more than 12 inches on center.
- Underlayment goes over the drip edge at eaves and under it at rakes.
Metal and thickness
Most drip edge is painted aluminum or galvanized steel. Thicker stock holds a straighter line and resists denting from ladders and gutter hangers. Thin, flimsy edge metal tends to wave along the eave, which is noticeable on a long, straight roofline.
Planning quantities
Add up the eaves and rakes in linear feet. Each 10-foot piece covers a little under 10 feet after the 2-inch lap, so plan an extra piece or two for corners and waste.
More on why it matters in drip edge explained and where it sits among the other parts in roof anatomy explained.