The answer to 'when to replace drip edge' is that you should replace your drip edge whenever it becomes damaged, worn, or no longer effectively channels water away from your home's exterior. Drip edge is an essential roofing component that helps prevent water damage, so it's important to inspect it regularly and replace it as needed.
Drip edge typically lasts 15-20 years, but its lifespan can vary depending on factors like weather, roof exposure, and the quality of the original installation. Signs it's time to replace drip edge include visible rust, cracks, or gaps that allow water to seep behind the edge and into your home's walls or foundation.