The answer to 'why is my drip edge water stains' is that there are a few common causes, including improper installation, damage, or wear and tear over time. Drip edges are designed to direct water away from the fascia and siding, but if they are not installed correctly or become damaged, water can seep behind them and cause unsightly stains.
Some other potential causes include clogged gutters, poor roof pitch, or even heavy rain and wind that can drive water up and under the drip edge. Symptoms include water stains, peeling paint, or rotting wood on the fascia or siding. To fix the issue, you may need to replace the drip edge, clean the gutters, or make other repairs to the roof and surrounding areas.