You can tell your pavers need re-sanding when the joints are losing material or letting weeds and ants return quickly. You can tell they need re-sealing when water stops beading or stains start grabbing faster.
The tricky part is that cleaning, rain, and coastal humidity can make both problems show up at once (paver sanding vs sealing), and sealing won’t fix empty joints. In the sections below, you’ll do a quick once-over with a few low-risk checks to see what’s going wrong. Let the sealer’s performance guide your next move, whether that’s re-sanding or re-sealing.
| What you observe | Likely issue | Best next move |
|---|---|---|
| Fresh gritty piles at edges/low spots after rain | Joint sand washing out | Re-sand (restore joint material) |
| Joints feel soft/scoopable, gaps widening, weeds/ants return fast | Joint sand loss | Re-sand soon |
| Water stops beading and sheets out; surface looks dusty/faded when wet | Sealer worn thin in that area | Re-seal (after joints are properly filled) |
| Stains grab faster than before (drinks/grease/leaf tannins) | Reduced sealer protection | Re-seal (spot issues often show first) |
| Both empty/low joints and poor beading/shedding | Sand + sealer both failing | Do both in order: re-sand first, then re-seal |
| Minor first-season joint drop with no washout signs | Normal settling | Monitor; no immediate action |
Three Quick Field Tests (Rain, Rinse, Bead)
If you skip the diagnosis, you can seal over empty joints and trap a problem that gets worse with rain and cleaning. A two-minute check now can save you from redoing work you just paid for.
After a normal rain, look for paver joints washing out, shown by sand piles at the edges or in low spots. Fresh grit that wasn’t there before points to washout, not “settling,” and it sets up weeds and loose pavers over time.
Next, do a gentle hose rinse on one sunny, high-traffic area. A dusty, faded look when wet plus water that sheets instead of beads means the sealer is worn thin in that spot. Don’t default to “it’s time to reseal” if the joints are empty. That Home Depot / Lowe’s weekend project shortcut is a bad idea, and sealing over low joints won’t fix the underlying loss.
Pressure washing can accelerate surface wear and strip protective films if the wrong tip, pressure, or technique is used. Read more in our article: Pressure Washing Concrete Safe
Signs Pavers Need Resanding
If your joints look a little lower than they used to, that can be normal after the first season. But when you can trace the loss to specific events, you’re not seeing “settling,” you’re watching joint material leave the system. After a light pressure wash or a typical Wilmington rain, gritty piles along borders, the garage apron, or low spots usually mean the sand is washing out.
Re-sanding moves from “nice to have” to “do it soon” when pavers shifting or wobbling makes “good enough for now” stop being true. The joint sand is the glue that locks the field together when weeds or ants return quickly, joints feel soft or scoopable with a key, gaps widen enough to catch with your shoe, or edge courses start to spread and make the pattern look slightly wavy. If you keep cleaning the surface while the joints stay low, you’ll speed up movement and make a simple top-off turn into a bigger reset.
Standing water after rain is a common clue that drainage and low spots are contributing to ongoing joint washout and movement. Read more in our article: Standing Water Driveway Issue
Signs Pavers Need Resealing
A homeowner in a hurry reseals the whole patio after one ugly stain, only to find some areas still soak up water while others turn slick and blotchy—pavers becoming slippery when wet. The fastest way to avoid that mismatch is to look for how the surface behaves in the spots that take the most abuse.
Your best tell is performance, not age: after a gentle hose rinse, water should bead up on sealed pavers. If it sheets out or soaks in quickly, your sealer has worn thin where you’re testing.
You’ll usually see the failure first in coastal North Carolina hotspots, not everywhere at once. You’ll notice it in places like the sunny traffic lane from the patio door to the grill, the driveway tire tracks, or edges that stay damp from sprinkler overspray. Another clear sign is faster staining, like a dropped drink, grill grease mist, or wet leaf tannins leaving a mark that used to wipe off. If the look changes patch-to-patch or you’re aiming for a consistent finish (and you’re not sure what sealer is already on there), call in a pro. This Old House gets this right: compatibility is not optional if you want to avoid haze and mismatch problems.
In coastal air, salt and humidity can shorten the life of many sealers by increasing moisture exposure and surface contamination. Read more in our article: Salt Air Humidity Concrete Asphalt
Roof not getting any younger? Contact us or call 703-673-6301 to find out where you stand.
