A water drainage system for shingled roofs exists in the form of a drip edge. A drip edge is essentially a piece of roof flashing that is crafted into an L-shape by manufacturers. A drip edge ensures that the water falling upon the shingled roof is directed towards the edges without reaching the underlying fascia or roofing board (roof decking). For this reason, drip edges are recommended for roofs in colder regions, as they prevent ice-damming, which can compromise the structural stability of a shingled roof. A metallic drip edge is commonly used among shingled roofs. Drip edges are usually retailed in 10-foot long sections. These need to be cut according to different roofing requirements. It is recommended to use a slightly longer drip edge so that water is properly directed towards the gutters. Installing a drip edge is rather easy. You can use the following information to install drip edge on your shingled roofs.
Step 1—Getting Started
Firmly place the ladder against the roof. Set yourself atop the ladder. Start by cleaning the roofing surface. The surface should be free of any debris. You can use a metal-wire brush and a broom for this purpose.
Step 2—Placing Drip Edge
Slowly lift a shingle that is closest to the apex of the roof. Gently, slide the flatter side of the drip edge under the eave. Push the drip edge a bit, so that it passes under the shingle and appears from its other side. Using a utility knife, cut back the front-end of the drip edge. The cutback drip edge will have a bit of an overhang. Wrap this around the edge of the eave. A wrapped flap like this is needed to ensure that the drip edge provides comprehensive coverage, leaving no room for the water to seep into the roof-decking. If you are not sure about the measurements, make each underlying segment of the drip edge wrapping at least one inch long.
Step 3—Securing Drip Edge
Secure the first piece of the drip edge with the roofing nails. Use the galvanized roofing nails in a minimal but effective way. This means that the nails should be hammered properly to ensure that they penetrate the roof sheathing or the fascia boards. However, excessive nailing can damage the drip edge and the roofing material as well. The other way to secure the drip edge is to use some roofing cement. Apply the cement along the drip edge and along the under-surface of the shingle. It is recommended to combine a few roofing nails with some roofing cement.
Step 4—Wrapping-up Drip Edge Installation
Continue laying the drip edge as explained above. Ideally, you should proceed across the eave. This is the conventional manner of laying the drip edge. When you reach the last row of shingles, near the edge of the roof, cut a slightly longer section of the drip edge. This ensures that the drip edge directs the water towards the gutter, eliminating any chance of water dripping along the roof’s edge.