The answer to 'fascia algae growth' is that it is a common problem caused by moisture, shade, and poor air circulation. Algae can build up on the fascia boards around the roof, causing discoloration and potential damage. Symptoms include a green, slimy buildup on the fascia.
In many cases, homeowners can address this issue themselves through cleaning and preventative measures. However, if the problem is severe or recurring, it's best to call in a professional roofing contractor to properly inspect and treat the issue.