The answer to 'when to replace drip edge' is that you should replace your drip edge whenever it becomes damaged, deteriorated, or no longer effectively channels water away from your home's exterior. Drip edge is a critical component of your roof system that helps prevent water damage, so it's important to inspect it regularly and replace it as needed.
Typical signs that your drip edge needs replacement include cracking, rusting, or pulling away from the roof edge. Over time, the elements can cause drip edge to degrade, which compromises its ability to divert water. Replacing drip edge is a relatively simple and affordable maintenance task that can help extend the life of your roof and protect your home's exterior from water damage.