How long is a piece of drip edge, and what sizes does it come in?
Common profiles
- L-style: a simple 90 degree angle. Common on older homes; it works, but it holds water closer to the fascia.
- D-style or T-style: a face with an outward kick at the bottom that throws water away from the fascia. A very common choice on new shingle roofs.
- Gutter apron: a longer, angled flange designed to reach into the gutter at eaves, often paired with D-style at the rakes.
Sizes
Profiles are described by roof flange width and face height, for example a 2 by 2 or 2 by 3 inch piece. The flange must lap at least 2 inches onto the deck. The face needs to cover the decking edge plus any sub-fascia and still extend at least 1/4 inch below the sheathing. Taller faces help when the fascia board sits low or the decking is thick.
Materials
- Aluminum: will not rust, bends easily, very common in painted colors.
- Galvanized steel: stiffer and more dent resistant; painted steel holds a crisp edge.
- Copper: for historic or high-end homes.
Keep dissimilar metals from touching to avoid galvanic corrosion, and use compatible nails.
Color
Drip edge is visible along every roof edge. Matching it to the gutters or fascia makes the line disappear, while contrasting it with the shingles outlines the roof. White, black, brown and bronze are common stock colors at Georgia suppliers.
Length in practice
Ten-foot pieces lap 2 inches at each joint, so plan on about 9 feet 10 inches of coverage per piece. For the full count method and installation sequence, see drip edge explained and roof anatomy explained.