The answer to 'fascia water stains' is that they are usually caused by water leaks or poor drainage around the roofline. Symptoms can include discoloration, peeling paint, or visible water marks on the fascia boards. Solutions may involve repairing roof flashing, replacing damaged fascia, improving gutter drainage, or addressing other underlying issues. In many cases, it's best to call a professional roofing contractor to diagnose and fix the problem properly.
Fascia water stains can be a sign of more serious roofing problems, so it's important to address them promptly. Trying to DIY the repairs may be possible for some homeowners, but a professional roofer has the expertise and equipment to properly identify and resolve the root cause.