What is drip edge made of?
The options
- Aluminum. The most common choice on Georgia homes. Light, rustproof, and available in many colors to match gutters and trim. Thin stock dents and waves more easily, so heavier gauges look better on long eaves.
- Galvanized steel. Zinc-coated steel, often painted. Stiffer than aluminum of similar thickness, which helps it stay straight and resist ladder dents. Cut ends and scratches can eventually rust, especially where water sits.
- Copper. Lasts the longest and weathers to a brown then green patina. Expensive, and it must be paired with copper or compatible fasteners and flashings.
- Vinyl. Inexpensive and rustproof, but it softens in heat, becomes brittle with sun exposure, and does not hold a crisp edge. Rarely used by professional roofers on shingle roofs.
Why metal compatibility matters
When dissimilar metals touch in the presence of water, the less noble one corrodes faster. Copper runoff onto aluminum or galvanized steel causes pitting. Keep copper with copper. Aluminum and galvanized steel are routinely used together with no practical problem.
Color and finish
Painted drip edge usually matches the gutters or fascia. White and brown are standard, with black, bronze and gray widely available. A baked-on finish holds up far better than field paint.
What does not change with material
Whatever the metal, the code requirements are the same: at least 2 inches onto the deck, at least 1/4 inch below the sheathing, 2-inch laps, and fasteners no more than 12 inches apart.
See profiles and placement in drip edge explained, related metals in roof flashing explained, and gutter pairing in gutter sizing and seamless gutters.