Sunken or shifting pavers usually point to something under the surface, not the pavers. A dip means the base beneath has washed out or settled unevenly; rocking or spreading pavers mean the joint sand that locked them together is gone. One is structural work for a qualified installer, the other a surface fix that re-sanding and sealing can help.
What sinking and shifting actually tell you
Pavers sit on a compacted base of stone and sand, held in place from the sides by the sand packed into the joints. When a paver drops lower than its neighbors, the problem is almost never the paver: it is the base underneath losing support, so the surface settles into the void. When pavers rock, tilt, or drift apart instead of dropping, the usual culprit is joint sand that has eroded away, leaving each paver without the lateral grip that kept it locked to the ones around it. Reading which of those is happening is the whole game, because they lead to very different fixes.
Common causes below the surface
A handful of causes account for most sunken and shifting pavers. Base washout is the big one: water moving under the surface, from poor drainage, a downspout dumping in the wrong place, or a high water table, carries away the fine material that supports the pavers. Poor compaction at install time leaves a base that keeps settling for years. Drainage problems concentrate water where it does the most damage. And joint-sand loss, the same erosion that empties the gaps between pavers, removes the side support that keeps everything tight. That last one connects directly to why paver joint sand washes out, because the erosion that thins your joints is also what lets sound pavers start to move.
Cosmetic versus structural
Not every uneven paver is a crisis, so it helps to separate cosmetic from structural. A single paver that rocks slightly, joints that have thinned, or minor unevenness on an otherwise solid surface are usually on the cosmetic-to-moderate end, and they often trace back to joint-sand loss rather than a failing base. A broad, deepening depression, a section that has dropped noticeably, pavers pulling away from a border, or a spot that pools water and keeps sinking are structural signals that the base itself needs attention. The rough test: if the surface is sound and level but the joints are empty, that is a surface problem; if the ground under the pavers has moved, that is a base problem.
Sound base but eroding joints?
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When the base has failed, the honest answer is that it needs to be fixed by a qualified paver installer, because that work means lifting the affected pavers, correcting the base and drainage, and resetting the surface. Vestra does not perform paver installation or structural repair; sealing and installation are different trades, and base work belongs with a licensed installer. If your surface shows the structural signals above, routing that to the right contractor first is the responsible order of operations. Sealing a surface that is actively sinking would only lock in a problem that still needs the base addressed underneath.
What re-sanding and sealing protect
For the surfaces that are structurally sound, the joint-erosion side of the cycle is exactly where cleaning, re-sanding, and sealing help. Refilling the joints restores the lateral support that keeps sound pavers from drifting and rocking, and sealing binds the top of those joints so the sand holds against rain and irrigation instead of washing straight back out. That does not repair a failed base, and it is not offered as a substitute for one, but on a solid surface it stabilizes the joints and slows the erosion that leads to movement in the first place. Many of the early warning signs overlap with the ones in signs your pavers need resealing, which is why catching them early keeps a sound surface sound.
How to approach it
The practical path is to diagnose before you spend. Walk the surface and separate the truly structural spots, deep dips, dropped sections, standing water, from the cosmetic ones, thin joints and the odd rocking paver. Structural findings go to a qualified installer for base and drainage work. The sound majority of the surface benefits from a clean, re-sand, and seal that protects the joints and keeps small movement from becoming a bigger problem. Approached in that order, you spend on structural work only where it is genuinely needed and protect everything else against the erosion that started the trouble.
Why drainage sits at the root
Behind most base problems is water going where it should not. A downspout that empties onto the edge of a paver field, a yard that slopes toward the patio instead of away, or a low spot that holds runoff after every storm all push water under the surface, and moving water carries away the fine material that supports the pavers. Over time that is what hollows out the base and lets a section settle. It is worth walking the surface during or just after a heavy rain to see where water actually goes, because the sinking usually lines up with it. Correcting the drainage, redirecting a downspout, regrading a low area, or improving where water sheds, is part of a durable base repair and belongs with the qualified installer handling the structural work. Sealing the sound areas afterward protects the joints, but the water has to be sent somewhere sensible first, or the same washout starts again underneath.
Florida is hard on paver bases specifically because of water. Sandy soils, a high water table, sudden heavy downpours, and irrigation all move fine material around under a surface, which is why base washout and settling show up here more than in drier regions. The same water erodes the joint sand on top. Sorting the structural from the surface-level, and handling each with the right trade, is what keeps a Tampa Bay driveway or patio stable over the long run.