What if you need to replace the drip edge on an existing roof or install a drip edge on an existing roof for the first time? Just as with installing drip edges on new roofs, you should check with your local building codes to see if there are special rules you have to follow about drip edge replacement. In years past, many building codes did not require drip edges; but the roofing community realized that these relatively inexpensive products make a big difference in the performance of the roof.
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Please refer to our Legal Notices for U. Location set to view all. Show All Products. Guide to Drip Edges for Shingle Roofs. Drip edges have two key purposes: Direct water away from fascia: Due to cohesion, surface tension and other forces, water droplets tend to stick to one another and to the surfaces they are on, albeit slightly.
A drip edge is designed to take advantage of those forces and, along with gravity, direct water into the gutter. If the home has no gutter, the drip edge will prevent the water from running down the fascia and onto or into the soffit cavity. However, without the drip edge, the water sticks to shingles, potentially working its way under the shingles to cause a leak. For example, water may cling to the fascia, which may cause rot, or, in severe conditions, a leak into the home.
Protect from wind-driven rain: When conditions are serious, the wind pushes water around on a roof. However, on the edges, the drip edge must compete with the wind. Wind can easily push the water upwards before gravity pulls the water down. The drip edge needs to hang significantly off the edge of the roof and has two to four inches of lower flange to combat this. Drip Edge Material Types Drip edges are made of various plastics and metals, which are both acceptable under most building codes so long as the metals are corrosion-resistant or galvanized.
Galvanized steel: Drip edges are designed to be in contact with water; so, if they are made of steel, they need to be galvanized to prevent rust. Minimum gauge steel is preferable so that the drip edge can withstand strong winds. Metal Roofing. Learn all about historic slate roofing tiles and how they can last up to years! Slate Roofing. You can learn more about common roofing components, issues and terms by following these links. Step Flashing. Architectural Shingles. Roof Pitch. Ridge Vent. Match the colors for a smarter finish.
Roof Repair. Roof Replacement. How Roofing Process Works. Roof Financing. Roof Replacement Cost. Roofing Overview. February 27, Roofing. What Is a Drip Edge? Why Is a Drip Edge Important? Drip edges not only act to preserve the appearance of your roof, but they help shield your property from potential damages: Deters insects and other small pests from accessing the space between the fascia board and a deck at the bottom of the roof, which could otherwise give pests the opportunity to enter a home or attic.
Protects the shingles from potential water damage, which otherwise may cause the roof, deck, and fascia board to erode over time. Pushes water away from the fascia and reduces the risk of it eroding over time. Helps the gutters to move water away from the house and its base. Shields exposed regions from insect and pest infestation. Safeguards the edge of a deck from water during rainstorms.
Guards the underlying roofline against damage in the winter months such as ice and snow damage, which could result in rotting. Safeguards the roof from strong gusts of wind and wind-blown rain. Shields the fundamental wood and promotes the performance of water-shedding.
Shields against the occurrence of shifts between a deck and the fascia boards. Lengthens the life and the effectiveness of the roofing materials and the roof overall. Types of Drip Edges Hemmed Drip Edge: Applied with metal and standing seam roofing, an open hemmed drip edge will deter water from going upward as a result of capillary action and passing the drip-edge metal.
What are the Installation Requirements? Metal Edge Drip: A drip edge has to be resistant to possible corrosion and should be 36 gauge or larger. Additional materials: tape measure, hammer, pencil, ladder, small roofing nails, tin snips Before you start the installation, remove all dirt and debris from the roof and take the measurements of the exterior edges to determine how much drip edge is required for the project.
How to Properly Install a Drip Edge Cut Lengths: Use a metal snip to divide the portions of the drip edge in accordance with your measurements. Begin Installation It is best to install a drip edge on a day with warm weather because it makes it easier for the shingles to be stripped back.
Overhang Joints As you get to the end of a piece, begin the following division with lap joint.
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