I think most people underestimate how much the weather affects interlocking surfaces. Freeze-thaw cycles, heavy rain, and even parked cars can shift the ground underneath over time. A few uneven pavers don’t always mean disaster, but if you’re seeing a pattern or drainage issues, it’s usually a sign the foundation needs attention. Sometimes a small section repair is enough, but if it’s widespread, professional leveling saves you money long-term. It’s one of those cases where fixing it properly once is better than constant patching.