What is a Drip Edge?
First things first, we need to define what a drip edge is, to begin with. According to Wikipedia, in roofing, a drip edge is a “metal flashing or other overhanging components with an outward projecting lower edge, intended to control the direction of dripping water and help protect underlying building components.” Drip edges are installed with an intended tilt that is meant to guide water away from your roof while at the same time ensuring your roof’s foundation is not exhausted prematurely by holes and fissures.
A drip edge goes along the edge of the roof under the shingles. Though it is generally overlooked by homeowners, a drip edge is an important component of the roofing system. Some homeowners even tend to exclude drip-edges from a roofing project in order to save money. In the short term, doing without drip edges may be less costly but in the end, lack of it will lead to damage that is expensive to fix.
Why is It Important?
- Deters insects and other small animals. A drip edge deters insects and other small pests from accessing your attic as they seal the gap in your roof, between the deck and the fascia board. Pests in your attic can be dangerous to your family and damaging to your home
- Protect the roof’s edge from ice damage. Ice damming occurs when ice melts from your roof and refreezes at the edge. The presence of a drip edge helps to prevent the formation of ice dams
- Protect and support shingles. Without a drip edge, shingles may slouch and water may find its way underneath your roof, this is an undesirable scenario. If this happens, your roof, deck and fascia board will erode over time
- Drip edges help prevent the movement between the roof deck and the fascia boards
- Supplements your gutter system in moving water far from your building and its base
- Protects the edge of the roof deck from water during rainstorms
- Drip edges protect your roofing structure from strong winds
- Improve water-shedding efficiency which in turn protects the underlying wood structure
- Overall, drip edges lengthen the lifespan of your roof and increase its effectiveness.
Types of Drip Edges
There are two broad types of drip edges:
L Drip Edge
These are used on low incline roofs. L shaped drip edges are located on the roof deck, on top of the fascia board. Before installation, the roofing material is held tightly using glue to the outside edge.
Hemmed Drip Edge
Usually used with metal and standing seam roofing. An open hemmed drip edge prevents water from moving upwards (through capillary action) and passing the drip edge metal.
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High Performance Restoration LLC
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