The answer to 'deck disease' is that decks can be susceptible to various types of damage and deterioration, commonly referred to as 'deck disease'. Some of the most common causes include moisture damage, wood rot, insect infestation, and weathering. Symptoms may include warping, cracking, discoloration, and structural instability.
In many cases, deck disease can be addressed through proper maintenance and DIY repairs. This may involve cleaning, sealing, and treating the wood, as well as replacing damaged boards. However, for more severe issues or structural problems, it's best to consult a professional landscaping or deck repair service to ensure the safety and longevity of your deck.