The answer to 'why is my patio' is that there could be several common causes for issues with a patio, including improper drainage, settling or sinking, cracks and damage, or overgrowth of weeds and moss. Symptoms may include pooling water, uneven or unstable surface, cracked or crumbling pavers, and an unkempt appearance.
The best solution depends on the specific problem. For minor issues like weed growth or small cracks, homeowners can often address these with DIY maintenance like pressure washing, weed removal, and sealant application. However, more serious problems like significant settling or structural damage may require professional patio repair or even full replacement to ensure proper function and safety.