Resanding patio pavers restores the sand between stones and stops weeds from growing through

Patio pavers shift and settle over time, and the sand that locks them together washes away in rain or gets swept out by foot traffic. When you notice gaps widening between pavers or weeds pushing up through the joints, the sand layer has worn down enough to resand. The process takes a weekend for a typical patio and requires only a broom, a shop vacuum, polymeric sand, and a garden hose—no special tools or experience needed.

Resanding is different from the original installation because you are working around existing pavers that are already in place. You will remove the old sand, clean the joints thoroughly, pour new sand into the gaps, and compact it with water so it hardens and locks the pavers tight again. The whole job costs between $100 and $300 in materials, depending on patio size.

Key Takeaways

  • Remove old sand completely by sweeping, vacuuming, and scraping out debris from each joint before adding new sand.
  • Use polymeric sand instead of regular play sand because it hardens when wet and resists weeds much longer than loose sand.
  • Compact the new sand by misting it with a garden hose until it stops absorbing water, which usually takes two to three passes.
  • Keep foot traffic off the patio for 24 to 48 hours after watering so the sand can set completely.
  • Polymeric sand lasts three to five years before weeds return and resanding becomes necessary again.

Sweep and vacuum out all old sand and debris

Start by clearing the patio of furniture, planters, and anything else sitting on it. Sweep the entire surface with a stiff-bristled broom, pushing debris toward the edges and into the joints. This first pass removes loose leaves, dirt, and surface sand that will clog your vacuum.

Use a shop vacuum with a brush attachment to suck out sand and debris from between the pavers. Work in rows, moving the vacuum slowly along each joint so it pulls out packed sand, small stones, and organic matter. Pay special attention to corners and edges where debris collects. If your vacuum has a wet-dry setting, use the dry setting for this step.

For stubborn sand or moss stuck in the joints, use a stiff brush or an old flathead screwdriver to scrape along the seams before vacuuming again. Do not use a pressure washer at this stage—it will drive sand deeper into the joints and make removal harder. Once you have removed the bulk of the old sand, sweep the entire patio one more time to catch any remaining dust.

Choose polymeric sand over regular sand

Polymeric sand is regular sand mixed with a binding agent that hardens when exposed to water. It costs two to three times more than play sand but lasts three to five years instead of one to two, and it stops weeds from rooting in the joints. Regular sand washes away quickly and offers no weed resistance, so it is not worth the money you save.

Polymeric sand comes in colors that match common paver tones—gray, tan, charcoal, and red. Choose a color that blends with your pavers or contrasts slightly if you want the joints to stand out. Buy enough to fill your joints completely; the bag will tell you how many square feet it covers. For a 200-square-foot patio with standard 4-inch joints, you will typically need two to three bags.

Read the manufacturer's instructions on the bag before you start, because some brands require you to dampen the joints first, while others say to keep them dry until after you sweep the sand in. Instructions vary, and following them exactly determines whether the sand sets properly.

Pour sand into the joints and sweep it level

Open your polymeric sand and pour it directly into the joints, working in sections of about 50 square feet at a time. Use a broom to sweep the sand across the pavers, pushing it down into the gaps. The sand should fill the joints completely, sitting flush with the top of the pavers or slightly below—not mounded above the surface.

Sweep back and forth across the joints several times to work the sand down and fill any air pockets. You will see sand sitting on top of the pavers; sweep this excess back into the joints or off the patio entirely. The goal is to have the joints completely full but the paver surface clean and dry.

If you have a large patio, work in manageable sections so you do not accidentally water sand you have not finished sweeping yet. A typical 200-square-foot patio takes about 45 minutes to an hour to sweep and fill completely.

Water the sand to set up the polymeric binder

Once a section is swept clean and the joints are full, mist it lightly with a garden hose set to a gentle spray. Do not flood the patio—you want a fine mist that wets the sand without creating puddles or washing sand out of the joints. The water activates the polymer binder, which begins to harden when ready.

After the first misting, wait 10 to 15 minutes and mist again. You will notice the sand darkening as it absorbs water and the joints becoming more solid. explore a third mist after another 10 to 15 minutes. Most polymeric sands reach initial set after three light waterings spaced 15 minutes apart.

Check the manufacturer's instructions for the exact number of waterings your brand requires—some need only two passes, while others need four. The sand should feel firm to the touch and no longer crumbly after the final watering. If you see water pooling on the patio surface, you have applied too much water; let it drain and do not water again until the surface dries.

Let the sand cure before using the patio

After the final watering, keep everyone off the patio for at least 24 hours while the polymeric sand cures. The binder needs time to fully harden, and foot traffic or water during this window can disturb the joints and weaken the set. Some manufacturers recommend 48 hours of curing time, especially if rain is forecast.

Check the weather forecast before you start resanding. If rain is predicted within 24 hours, wait until the forecast clears. A heavy rain during the curing period can wash sand out of the joints or prevent the binder from setting properly. Light rain after 24 hours is fine and actually helps the curing process.

After the cure time is complete, the joints should be solid and the pavers locked in place. Walk on the patio and check for any soft spots or sand that shifts under your feet. If you find areas that did not set properly, you can re-water those sections lightly and give them another 24 hours to cure.

Maintain the patio to extend sand life

Polymeric sand lasts longer than regular sand, but it will eventually break down from UV exposure, foot traffic, and weather. Sweep your patio monthly to remove leaves and debris that trap moisture and promote weed growth. A light sweep also helps keep the joints clear so water drains properly instead of pooling.

Avoid using a pressure washer on the joints for the first year after resanding, as the force can dislodge sand that is still settling. After a year, you can use a pressure washer on low pressure (below 1500 PSI) if you keep the nozzle at least 12 inches away from the joints and angle it away from the seams.

Weeds may begin to appear in the joints after three to five years as the polymeric binder breaks down. When this happens, you can pull them by hand, spray them with a herbicide, or resand the patio again using the same process. Resanding is usually faster and cheaper than fighting weeds one by one.

Frequently Asked Questions

Can I resand a patio that has moss or algae growing in the joints?

Yes, but you need to clean it first. Spray the affected areas with a 1-to-1 mix of white vinegar and water, let it sit for 30 minutes, then scrub with a stiff brush and rinse. Once the patio is dry, proceed with vacuuming and resanding as normal. The polymeric sand will prevent moss from returning for several years.

What happens if it rains while I am resanding?

If rain starts after you have swept the sand in but before you have watered it, cover the patio with a tarp and wait for the rain to stop. If rain starts during the watering phase, stop and let the rain finish. Once it stops, wait for the surface to dry, then resume watering. If rain comes during the 24-hour cure time, the sand may not set properly—wait 48 hours instead before using the patio.

Do I need to remove the pavers to resand, or can I do it in place?

You can resand without removing the pavers. The process works on pavers that are already laid and settled. Removing pavers is only necessary if they are cracked, broken, or sitting significantly higher or lower than their neighbors.

How much polymeric sand do I need?

Most bags cover 50 to 100 square feet depending on joint width. Measure your patio in square feet and check the bag label for coverage. For standard 4-inch-wide joints, plan on one bag per 50 to 75 square feet. Buy one extra bag in case you need to touch up areas that do not set evenly.

Can I use regular sand instead of polymeric sand to save money?

You can, but it will wash away in rain and weeds will return within a year. Polymeric sand costs more upfront but lasts three to five times longer and stops weeds, making it cheaper over time. If budget is tight, resand with regular sand now and plan to upgrade to polymeric sand next time.