What You Need to Know Before You Start
A paver patio is built in layers: compacted soil, sand base, pavers, and sand joints. The work takes a weekend or two depending on size, and you can do it without special tools if you rent a plate compactor. The hardest part is not the installation itself — it is getting the base flat and firm enough that pavers won't shift or sink after a year. A soft or uneven base will crack grout, trap water, and force you to reset pavers within months.
Before you dig, call 811 or your local utility locating service to mark buried gas, electric, and water lines. Mark the patio outline with chalk or spray paint. Measure twice. A patio that slopes the wrong way will pool water; one that slopes correctly sheds it toward a drain or away from your house.
Key Takeaways
- The base layer must be compacted soil, then a 4-inch sand bed, compacted again — this is what keeps pavers from sinking or shifting.
- Pavers are laid in a running bond or herringbone pattern, set into the sand with a rubber mallet, and checked with a level as you go.
- The patio must slope at least 1/8 inch per foot away from your house so water runs off instead of pooling.
- Polymeric sand (not regular sand) fills the joints and hardens when wet, locking pavers in place and preventing weeds.
- Renting a plate compactor costs $40 to $80 per day and is worth it — hand tamping leaves a weak base that fails within a year.
Preparing the Site and Digging Out the Base
Mark your patio outline with chalk or spray paint. Measure the length and width, then add 6 inches on all sides — you will need room to work and to set edge restraints. Call 811 before you dig. Wait for the utility locating service to mark gas, electric, and water lines. Digging into a buried line can kill you or cost thousands in repairs.
Dig out the area to a depth of 6 to 8 inches. This leaves room for 4 inches of compacted sand base and 2 inches of pavers. Use a shovel or rent a small excavator if the area is large. Remove grass, roots, and rocks. The soil underneath should be firm — if it is clay or very soft, dig another 2 inches and add gravel to improve drainage.
Compact the soil with a plate compactor rented from a home center. Make two or three passes over the entire area, overlapping each pass slightly. The soil should be hard enough that your foot leaves only a shallow impression when you step on it. This step is not optional. A loose base will cause pavers to settle unevenly within months.
Laying the Sand Base and Setting Edge Restraints
Spread 4 inches of coarse sand (sometimes called mason sand or concrete sand) evenly over the compacted soil. Do not use play sand or fine sand — it compacts too tightly and traps water. Rake it level, then compact it with the plate compactor. Make two or three passes until the surface is firm and level.
Check the slope as you work. The patio should slope away from your house at a rate of at least 1/8 inch per foot. For a 10-foot patio, that means the far edge should be 1.25 inches lower than the edge near your house. Use a 4-foot level and a shim to measure this as you compact. If the slope is wrong, add or remove sand until it is correct.
Install edge restraints along the perimeter. These are plastic or metal borders that keep pavers from spreading outward. Snap them into place along the chalk line, then drive stakes through the restraint into the ground every 2 feet. The restraint should sit at the same height as the top of the pavers when they are laid.
Laying the Pavers in a Pattern
Start at one corner and lay pavers in your chosen pattern. The two most common are running bond (like bricks in a wall) and herringbone (45-degree angles). Running bond is faster and uses less cutting. Herringbone looks more formal but requires cutting pavers at the edges.
Set each paver into the sand by tapping it with a rubber mallet. Do not drop them or strike them with a steel hammer — they will crack. Tap gently until the paver sits level with its neighbors. Check every few pavers with a 4-foot level. The surface should be flat across the entire patio. If one paver is higher than the next, remove it, add or remove sand underneath, and reset it.
Work in rows from one end to the other. Lay pavers tightly against each other with no gap between them. If a paver does not fit at the edge, mark it with chalk, remove it, and cut it with a wet saw or a paver splitter. Rent a wet saw from a home center if you have more than a few cuts to make. A paver splitter (a manual tool that costs $20 to $40) works for straight cuts on a few pavers.
Filling Joints with Polymeric Sand
Once all pavers are laid and level, sweep the entire surface with a stiff broom to remove loose sand and debris. Polymeric sand is a special sand mixed with a binder that hardens when wet. It locks pavers in place, prevents weeds from growing between them, and keeps ants from nesting in the joints.
Pour polymeric sand over the patio and sweep it into the joints with a broom. Work in small sections. Fill the joints completely — they should be flush with the top of the pavers, not sunken. Sweep off excess sand from the surface of the pavers.
Once the joints are filled, mist the entire patio with a garden hose on a low setting. Do not spray hard or you will wash the sand out of the joints. A light mist is enough. The water activates the binder in the polymeric sand, and it will harden over the next 24 hours. Do not walk on the patio or allow water to pool on it during this time. Keep the area dry for at least 24 hours after misting.
Tools and Materials You Will Need
Rent a plate compactor ($40 to $80 per day) and a wet saw if you have more than a few pavers to cut ($30 to $50 per day). Buy a rubber mallet, a 4-foot level, a shovel, a rake, and a stiff broom. You will also need a chalk line or spray paint for marking, a measuring tape, and a straightedge.
Materials include coarse sand (4 inches deep for the base), pavers (measure your area and add 10 percent for cuts and breakage), polymeric sand for the joints, and edge restraints. Prices vary by region and paver type. Concrete pavers cost less than stone or brick, but all three install the same way. Calculate the square footage of your patio and buy pavers by the pallet — most home centers sell them this way.
Common Mistakes That Cause Problems Later
The most common mistake is skipping or rushing the base preparation. A weak or uneven base will cause pavers to settle, crack, or shift within a year. Spend time compacting the soil and sand. It is the difference between a patio that lasts 15 years and one that fails in two.
The second mistake is using regular sand instead of polymeric sand in the joints. Regular sand washes out, weeds grow through, and ants nest between the pavers. Polymeric sand costs a bit more but hardens and locks everything in place. It is worth the extra expense.
The third mistake is getting the slope wrong. A patio that slopes toward your house or pools water in the middle will trap moisture, encourage mold, and damage the base. Check the slope with a level and shim before you lay pavers. Correct it then, not after.
Frequently Asked Questions
Can I install a paver patio on top of concrete?
Yes, but only if the concrete is in good condition with no cracks wider than 1/8 inch. Clean the concrete, fill any cracks with concrete filler, and let it cure. Lay a thin sand base (1 to 2 inches) over the concrete, compact it, and install pavers as normal. The concrete acts as your base layer, so you skip the soil preparation step.
How long does it take to install a paver patio?
A 100-square-foot patio takes a weekend if you work alone. A 200-square-foot patio takes two weekends. Most of the time goes to base preparation and compacting. Laying pavers is faster once the base is ready. Add extra time if you have many pavers to cut or if you are learning as you go.
What is the difference between polymeric sand and regular sand?
Polymeric sand contains a binder that hardens when wet, locking pavers in place and preventing weeds. Regular sand washes out in rain, allows weeds to grow, and provides no structural support. Polymeric sand costs $10 to $20 more per bag but lasts much longer and requires less maintenance.
Do I need to seal pavers after installation?
Sealing is optional and depends on the paver material. Concrete pavers benefit from sealing because it protects against stains and fading. Stone and brick are more porous and may need sealing in wet climates. Sealer lasts two to three years and must be reapplied. It is not required for the patio to function, but it extends the life of the surface.
What should I do if pavers sink or shift after installation?
Sinking or shifting usually means the base was not compacted enough or was too soft to begin with. Remove the affected pavers, add more compacted sand underneath, and reset them. If the problem is widespread, you may need to remove all pavers, recompact the base, and start over. This is why base preparation matters so much.