The answer to 'patio disease' is that common causes include fungal growth, moss buildup, and cracking/crumbling concrete. Symptoms may include discoloration, slippery surfaces, and structural damage. Solutions can involve cleaning, sealing, or replacing the patio surface, but more serious issues may require calling a professional landscaper.
Patio diseases can often be treated with DIY methods like power washing, applying anti-fungal treatments, or re-sealing the surface. However, if the issue is more severe such as structural cracks or extensive moss growth, it's best to consult a professional landscaper who can properly diagnose and address the root cause.