Roofing Details: Why Drip Edges Are Important

roof with new shingles always looks good. If you are a roofer or if you pay attention to the finer details of roofing jobs, you know thatnew roofs can look good, but they don’t all look great. The difference lies in attention to detail, quality of materials, and installation. One of the more noticeable details is a roof’s drip edge.

What’s a drip edge?

A drip edge is a piece of roofing trim. The drip edge supports overhanging shingles at the ends of a roof, providing structure to the overhang and directing water to the gutters and away from the fascia of the roof. Drip edges also help prevent shingles at the end of a roof from cracking, sagging and becoming limp. Drip edges can also be installed on the gable ends of a roof. They add a clean, trimmed look to a roof while preventing water from entering into undesirable areas.

Benefits of drip edges.

  • Drip edges maneuver water from the end of your roof away from the fascia or directly into yourhome’s gutter system.
  • At roof ends, drip edges are installed below the shingles and roofing underlayment, preventing water from seeping into the vulnerable areas below them.
  • Drip edges support overhanging shingles, keeping them in a pleasing and stable straight line.
  • Not only can shingles without a drip edge become damaged, they also don’t look very sharp.

Styles of drip edge.

Drip edges come in a variety of shapes and styles. The most common are the T-, C- and L-style drip edges.

  • The L-style drip edge is a simple design that is bent in the center. The 90-degree angle forms an “L” that is placed snugly at the roof end: one end under the roofing materials and one end over the fascia.
  • C-style drip edges have a curved bend, shaped like a “C” that are installed under the roofing material and then curve around under the decking of the roof. These drip edges are used on roofs without fascia or facing boards. The curved drip edge prevents water from seeping into the decking by curling around the end of the roof.
  • T-style drip edges have an extra lip that actively guides water away from the house. Unlike the L-style drip edge, they are not bent at a 90-degree angle. This style extends beyond the roof deck and is bent back toward the house in a triangular shape. The extra lip extends away from the roof end and moves water out and away from your home. While more complex then the other drip edge styles, the T-style is the most effective at moving water away from a house.

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