Atlanta Roofing: Article About Drip Edge Styles
Metal flashing around the perimeter of a roof line adds a finished look to the structure while serving as a moisture barrier. Although some builders omit drip edges when installing roofing systems, the extra protection against water leaks is vital in regions with a lot of rainfall. The metal edging directs water into the gutter and away from the building. The appropriate style of drip cap depends on the roof type and framework. Atlanta roofing specialists can offer helpful input to customers who are choosing a drip edge design.
A wide range of metals is available for roof edge flashing, and each product can be manufactured in colors to match nearly any building's exterior. The metal should be corrosion resistant so that it leaves no stain on the roof or fascia. Along the eaves, the underlayment is normally placed under the metal flashing while it goes over the edging at the rakes. Although a C style drip edge serves its purpose when installed on an existing roof, most edge flashing has an overhang. Very commonly used metal drip caps are the L and T style varieties.
For low slope roofing systems, an L type drip edge works well since it is bent at a 90 degree angle. One side fits under the roofing materials while the other lies over the fascia.
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The overhang that guides the water away from the structure is located at the bottom of the flashing. The newer P style edge functions in a similar way but forces the water to flow even farther from the wall. With a T style profile, precipitation is moved by a lip that is attached to a triangular configuration. The drip cap's shape makes it ideal for steep pitches. If the roofing system is built with metal panels, then the T style edge's flange can act as a cleat to attach the sheets to the eaves. The F8 style drip cap is designed like the T style with the additional feature of a long flange for nailing it to the roof deck.
Some homes and commercial buildings lack an area for soffit and need a form of ventilation at the eaves and rakes. A vented drip edge performs this task in addition to safeguarding the roof and siding from moisture. For historical buildings, a crown drip edge is often used in order to reflect the architectural characteristics of the era. Many other versions of metal edge flashing are sold including a D style, gutter apron and asphalt drip. A sider's edge can be installed directly over an existing drip edge to avoid the tearing off process. Even a built up roof can be guarded against the loss of gravel through the addition of metal trim around the perimeter of the roofing system.