Is a drip edge necessary on a roof?

Without a drip edge, water may end up beneath the shingles and may cause damage to various parts of the home. Though your home may not have originally had a drip edge installed, drip edges are now required by most building codes across North America to protect homes from damage.

iko.com - Guide to Drip Edges for Shingle Roofs - IKO

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Step Ten: When you reach the roof’s ridge, you need to make yet another cut in your drip edge. Hold the drip edge up to the ridge and make a mark along where the drip edge exceeds the roof. Make a straight cut through the bottom of the drip edge with your tin snips. When you reach the roof’s ridge, you need to make yet another cut in your drip edge. Hold the drip edge up to the ridge and make a mark along where the drip edge exceeds the roof. Make a straight cut through the bottom of the drip edge with your tin snips. Step Eleven: Fold the drip edge to fit over the ridge. Mark the plumb line, or centerline, as in the image below. Cut the topmost part of the drip edge along this line to create a finished look. Place a single nail in the outside piece to hold the drip edge in place. You should always check with your local building code to see if there are any extra rules you are required to follow during drip edge installation.

How to Replace a Drip Edge on an Existing Roof

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? It can be done; here’s how: Step One : Gently lift up the shingles on the edge of the roof and locate the nails holding the existing drip edge onto the roof. Gently lift up the shingles on the edge of the roof and locate the nails holding the existing drip edge onto the roof. Step Two : Use a flat pry bar and hammer to pry the nails out of the drip edge gently. Use a flat pry bar and hammer to pry the nails out of the drip edge gently. Step Three : Once free, slide the drip edge out and discard. Once free, slide the drip edge out and discard. Step Four : Install the new drip edge as described above, with cement and nails. You’ll need to ask another roofing professional to hold up the shingles while you do so. 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. By installing drip edges properly, you’ll be giving your customers a better roofing system. If you’ve discovered your roof is missing a drip edge, or has a damaged drip edge, you can get in touch with a roofing contractor through our Roofing Contractor Locator to get professional advice. The video below provides additional information on drip edge installation on shingle roofs: