How to Deep Clean Patio Pavers

Pavers are the backbone of a functional backyard, but they are also magnets for moss, algae, and stubborn organic stains. Over time, the sand between your pavers washes away, creating the perfect nursery for weeds and ants to undermine your hardscape. A deep clean isn't just about aesthetics; it is a critical maintenance step to preserve the structural integrity of your patio. Done well, this process clears the pores of the concrete or stone, removes the slick layer of algae that creates a slip hazard, and resets the visual appeal of your outdoor space. Expect to trade a Saturday morning for a patio that looks brand new, rather than just merely clean.

1. Clear the Deck. Remove all furniture, planters, and decorative items from the patio. Use a stiff-bristled outdoor broom to sweep away loose dirt, leaves, and debris.
2. Uproot the Enemy. Pull any weeds growing between the joints by hand or with a weeding tool. If they are deeply rooted, apply a targeted herbicide or a mixture of vinegar and water directly to the joints.
3. Soak the Surface. Dilute a pH-neutral paver cleaner in a pump sprayer according to the manufacturer's instructions. Mist the entire patio evenly, ensuring the stone is saturated but not pooling.
4. Scrub Hard. Use a stiff synthetic-bristle deck brush to work the cleaner into the surface in a circular motion. Focus on high-traffic areas or dark, discolored patches.
5. Flush It Clean. Use a garden hose with a spray nozzle to rinse the soapy residue towards the edges of the patio. Do not use a high-pressure nozzle too close to the surface, as it can displace the joint sand.
6. Lock in the Sand. Once the patio is completely dry, pour polymeric sand over the joints and sweep it in until they are full. Use a leaf blower on low power to clear excess sand from the surface of the pavers.
7. Seal the Joints. Use a mist setting on your hose to lightly dampen the sand. This activates the binding agents that lock the sand into a solid, weed-resistant barrier.