What is drip edge?

Drip edge is a bent metal strip, typically aluminum or galvanized steel, installed at the perimeter of a roof where it meets the fascia board and decking. It performs a single essential function: it extends slightly beyond the edge of the roof and channels water runoff down and away from the structure rather than allowing it to seep behind the fascia or soak into the soffit and wall framing.

The trim is installed in two locations on most residential roofs. Along the eaves (the horizontal edges where the roof overhangs the walls), drip edge prevents water from running down the outside of the fascia board. On the rakes (the sloped edges where the roof meets the gable ends), it keeps water from being driven behind trim by wind and rain.

Without drip edge, water can accumulate on the fascia, deteriorate wood framing, promote mold growth, and eventually damage the structure. In Georgia's humid climate with frequent rain and coastal properties subject to tropical systems, proper water management at the roof edge is especially important. Building codes in most jurisdictions now require drip edge installation as part of standard roofing practice.

Installation typically occurs during new roof construction or replacement. A qualified roof contractor will secure the drip edge with fasteners before installing shingles or other roofing material, ensuring the overlap and slope are correct for maximum water shedding.