How to Make a Cedar Shingle Drip Edge
A drip edge is a metal barrier installed at the edges of a roof to prevent water from seeping beneath shingles and into the roof decking or fascia (facing board) or rake board (sides along the pitch). It is required on cedar shingles, though the cedar variety tend to extend farther down than other shingles. It is best installed before shingling, but adding it later is doable. Does this Spark an idea?
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Instructions
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Buy your drip edge at a building supply store or roofing supplier. Measure the edges of your roof --- the bottom or fascia edge and the sides or rake edges. Drip edge comes in two styles. It is either bent at a 90-degree or similar angle so one side is flush with the roof while the other overhangs flat, fitting flush on the roof. The bent style usually offers better protection. Drip edge typically comes in 10-foot sections; allow for overlap at joints.
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Start at one corner on the roof's bottom edge. The job is easier with two people, one on each end of the drip edge. Nail the ends of a strip first, making sure the edge is snug against the roof plane. Then nail every six to eight inches. Overlap sections about an inch; pre-cut a piece to fit at the end, using tin snips. Some installers prefer fewer nails and use roofing cement to hold the drip edge. Cement works best when adding edge under existing shingles; put cement on top of the roof edge, insert, then press down on the shingles.
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Overlap or miter corners. Once you've come to the end of the bottom edge of the roof, install the rake edging up the sides. You can miter the corners or simply overlap them, which is easier. When overlapping going up a pitch, make sure the upper piece is on top. If installing drip edge on an unfinished roof, get all the edging in place before adding roofing paper and shingles. If installing under existing shingles, simply slide one edge under the shingles, then nail through the shingles to secure.
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