If your pavers are moving, the fix depends on which problem you actually have. There are two, and they have different causes.
Pavers that slide, twist, and open up at the joints are separating. That is almost always a problem with the edge restraint around the perimeter. Pavers that dip, rut, or sag in one area are sinking. That is a problem with the base underneath, where you can’t see it.
We get called out for both every month across Palm Beach County. The pavers themselves are rarely the issue. Quality pavers last decades. What fails is what is holding them in on the sides and what is supporting them from below.
Here is what we find when we pull them up, and what it takes to make it right.
The Number One Reason Pavers Shift Is the Edge Restraint
Pavers are an interlocking system. Nothing is glued down. The perimeter is what holds the whole field tight, and when the perimeter lets go, the pavers in the middle have nothing to push against.
On a driveway this shows up fast. Vehicle tires don’t just roll across the surface, they twist. That rotational pull turns and works the pavers sideways, and if there is nothing locking the border, they twist, turn, and open up. Once they open up, water gets down into the joints, and water creates havoc.
Done right, there is a concrete edge restraint on the exterior borders, all the way around the installation. Not most of the way. All the way around.
Where installers cut the corner
The shortcut we see is cement. The restraint is there, but there is barely any cement in it. It holds for a season or two, then it breaks away in a section, and the pavers next to that section start separating.
Two ways to build the edge
- The traditional way puts the concrete on the exterior of the paver border. It works, and it is what most companies do. The downside is that grass often can’t grow up to it, so you end up with a visible strip along the edge.
- The other way is a paver set border in concrete. The edge is cleaner and the grass grows right up to the pavers. It costs more because it is more labor intensive and takes more skill, but it is a better looking edge. We give customers the choice.
The Number One Reason Pavers Sink Is the Base You Can’t See
Shifting and sinking are not the same failure. When pavers dip, rut, or sag, the problem is under them.
For a driveway or anything that carries vehicles, sinkage comes from improper sub-base compaction. The weight is going somewhere, and if the material below was never compacted properly, it keeps moving. For a patio or a pool deck over grade, it is the base itself that was done wrong.
What a correct driveway base looks like
Four inches of road rock goes down first, then two inches of recycled concrete aggregate, compacted. That is the build that holds up under vehicles.
What a cheap driveway base looks like
Rock is expensive, so this is where the money gets saved. Instead of four inches of road rock and two inches of recycled concrete aggregate, the installer puts down four inches of recycled concrete aggregate by itself and compacts it. Recycled concrete aggregate is the less expensive material.
And it holds, at first. That is the part homeowners don’t expect. It looks fine long enough that the job seems like a success, and then it starts to go.
Sometimes it isn’t even a decision. Some installers don’t own a compactor, or don’t have the trailers to haul rock, so the job gets built around the equipment they have instead of around what the driveway needs.
Joint Sand Is Not a Finishing Touch
The sand between your pavers is not cosmetic. It is what makes them interlock. No sand in the joints means no interlock, and pavers with no interlock get loose. Loose pavers twist and turn and open up, water gets into the joints, and water is what turns a cosmetic issue into rutting and sinkage.
The right way
Broadcast silica sand goes into all of the paver joints before the final compaction. When the plate compactor runs over the surface, the vibration drives that sand down and packs it into the joints. That packing is what locks the pavers in.
The way it usually gets done
The installer compacts first, throws a little bit of sand across the top afterward, and off they go. The joints look full on day one. They were never actually packed.
About a year later the pavers start moving, because there was never enough sand down in there to hold them. If your joints look low, hollow, or sweep out easily, that is worth paying attention to before the pavers start to separate.
What It Actually Takes to Fix It
How far the separation has traveled decides the repair. There is no way to know for certain until the pavers come up, which is why every paver repair starts with us opening up a section and looking at the base.
When it is one area
Say the concrete edge restraint broke in a small section and about ten feet of the border separated. We pull up twelve to fourteen feet of it, which is more than the damage you can see. We remove the existing base, make sure there is rock in there, and confirm the sub-base is compacted. Then the base sand or recycled concrete aggregate goes back, gets compacted again, and the pavers go back down. The concrete edge restraint gets rebuilt at the same time, because that is what failed in the first place.
We always pull back further than the visible damage. Separation does not stop neatly at the edge of what looks bad.
When the whole thing is going
If the entire driveway or the entire patio is separating, the entire installation has to come up. There is no spot fixing it. The pavers get stacked on site, the base gets rebuilt from the bottom, and then the pavers get reinstalled.
That sounds worse than it usually is. In most cases the pavers themselves come up fine and go right back down, so you are paying to correct the base and the restraint rather than to buy all new material.
Why it happened in the first place
We don’t make a habit of asking customers what they paid. But more times than not, a failed installation traces back to a less expensive job done by someone without the experience or the right equipment. The savings were real at the time. They just got spent again, with the tear-out added on top.
Two Problems That Look Like Bad Product
Not every complaint we hear is about movement. These two come up constantly, and both of them start on install day rather than with the material.
The white film after sealing
Somebody sealed the pavers and then the surface got wet before the sealer was ready. It rained, or the sprinklers came on, and the pavers turned a whitish, hazy color. The homeowner thinks they got a bad sealer.
You do not have to seal your pavers right away. Give them at least thirty days to cure first. Rushing the sealer, or letting water get on it too soon, is what causes that film. Pulling it back off is paver sealing and restoration work, and it is avoidable if you wait.
Polymeric sand that disappeared
Wide joints often get polymeric sand, which is designed to harden up. If too much water goes down on it, the polymers are affected and it never holds together. It ends up blowing away in the wind.
Now the joints are empty, and empty joints bring you right back to loose pavers and separation.
What to Ask Before You Hire Anybody
Almost every failure we repair was decided before the first paver went down. You cannot inspect a base after the job is finished, so the questions have to come first. When we sell a job, we want the customer to understand exactly how many inches of rock and how many inches of base are going in. Any contractor should be able to tell you the same.
Ask these, and listen for specifics rather than reassurance.
- How many inches of rock and how many inches of base are you putting down? You want real numbers, in writing, on the estimate. If the answer is vague, that is your answer.
- Are you using road rock under the base, or only recycled concrete aggregate? Recycled concrete aggregate on its own is the less expensive build.
- How are you compacting the sub-base, and do you own the compactor? Equipment decides a lot about how a job gets built.
- Does the concrete edge restraint run the entire perimeter? It should go all the way around the exterior border, with enough cement in it to last.
- Do you offer a paver set border in concrete? It costs more and takes more skill, but you get a cleaner edge and grass that grows right up to the pavers.
- When does the joint sand go in? The right answer is before the final compaction, so it vibrates down into the joints. If they sweep it on at the end, keep looking.
- When should I seal it? Anyone telling you to seal right away is rushing it. Pavers need at least thirty days to cure.
How We Build It
We build the way we would want it built at our own house. Full depth rock and base, compacted properly for what the surface has to carry. A concrete edge restraint around the entire perimeter, with the option of a paver set border if you want the cleaner edge. Silica sand broadcast into every joint before the final compaction, so the pavers actually lock together. And no rush to seal it.
Hero’s Pavers has been installing and repairing pavers in Palm Beach County since 2020. We are family run, licensed and insured, and the owner is on every job from the first walkthrough to the final sweep. We work throughout the county, including Lake Worth Beach, Boynton Beach, West Palm Beach, Royal Palm Beach, Wellington, Delray Beach, Greenacres, Lantana, and Boca Raton.
If your pavers are shifting, sinking, or separating, let us come look at it. We will tell you honestly whether it is a small repair or whether it needs to come up, and we will show you what we find underneath.
Call (561) 707-3265 or request an estimate.