The answer to 'how often to replace drip edge' is that drip edge should typically be replaced every 15-20 years, or whenever it shows signs of significant wear and damage. Drip edge is the metal flashing installed along the edges of a roof to direct water away from the home's siding and foundation. Over time, it can become corroded, cracked, or pulled away from the roof, compromising its ability to properly channel water flow.
Regularly inspecting your drip edge and replacing it when necessary is an important part of roof maintenance. Catching issues early can help prevent water damage and costly repairs down the line. If you notice any issues with your drip edge, it's best to have a professional roofing contractor take a look and determine if replacement is needed.