The answer to 'deck drainage problems' is that common causes include improper installation, clogged drains, and poor grading around the deck. Symptoms can include standing water, mold and mildew growth, and damage to the deck structure. Solutions may involve fixing drainage issues, cleaning clogged drains, and regrading the area to ensure proper water flow away from the deck.
For minor issues, homeowners can often address deck drainage problems through DIY efforts like cleaning gutters and downspouts, adding drain pipes or catch basins, and adjusting the slope of the ground around the deck. However, more complex drainage problems or structural damage may require the expertise of a professional landscaper or deck contractor to properly assess and resolve the issue.