The answer to 'why is my drip edge leaking' is that the drip edge has likely become damaged or disconnected, allowing water to leak behind the edge and into your home. This is a common issue that can be caused by a few different factors, including improper installation, weathering and wear over time, or physical damage to the drip edge itself.
Some common symptoms of a leaking drip edge include water stains on the exterior walls or fascia, rotting wood, and water pooling near the foundation. To fix the issue, you'll need to inspect the drip edge closely to identify the source of the leak, then either repair or replace the damaged section. This may involve reattaching the drip edge, sealing any gaps or cracks, or replacing the entire drip edge if it's beyond repair.