What you need to know before you start

Laying a patio is a project you can do yourself if you have a level yard, basic tools, and patience for the groundwork. The process takes a weekend or two depending on size, and the hardest part is not the laying itself but preparing the ground underneath — if your base is uneven, your finished patio will be too. You'll need a shovel, a level, a rubber mallet, sand, gravel, and either pavers or concrete slabs. The real skill is making sure water drains away from your house and that everything sits flat.

Before you dig, call 811 or your local utility locating service to mark underground pipes and cables. This is free and takes a few days, but hitting a gas line or water main will cost far more than the patio itself. Once the ground is marked safe, you can begin.

Key Takeaways

  • Call 811 before you dig to locate underground utilities, or contact your local utility locating service by phone.
  • The foundation matters more than the pavers — a compacted base of gravel and sand keeps your patio level and drains water away from your house.
  • Slope the ground very slightly (about 1 inch per 8 feet) away from your house so rainwater runs off instead of pooling.
  • Lay pavers on a bed of sand over compacted gravel, tapping each one level with a rubber mallet before moving to the next.
  • Fill the gaps between pavers with sand or polymeric sand to lock them in place and prevent weeds.

Mark the area and check the slope

Use chalk, spray paint, or string to outline where your patio will go. Measure the length and width so you know how many pavers you need — most come in standard sizes like 12 by 12 inches or 12 by 24 inches. Buy about 10 percent extra to account for cuts and breakage.

Next, check the slope of your yard using a long straight board and a level. Lay the board across the area from the side closest to your house to the far side. Place the level on top and note how much it tilts. You want the ground to slope away from your house — ideally about 1 inch of drop for every 8 feet of distance. This keeps water from pooling against your foundation. If your yard slopes the wrong way or is flat, you'll need to add or remove soil to create the right angle.

Remove sod and dig out the base

Use a shovel to remove grass and the top 4 to 6 inches of soil from the marked area. This is the most labor-intensive part. You can rent a sod cutter from a home center if the area is large — it's worth the cost for anything bigger than 100 square feet. Pile the removed soil to the side; you may be able to use it elsewhere in your yard or give it away.

Once the sod is gone, check the depth and slope again with your board and level. The bottom of the hole should still slope away from your house. If it doesn't, add or remove soil until it does. Compact the soil firmly with a hand tamper or a rented plate compactor — loose soil will settle under the weight of the patio and cause uneven spots.

Lay the gravel and sand base

Spread 2 to 3 inches of gravel (crushed stone, not river rock) evenly across the bottom of the hole. Compact it firmly with your tamper. This layer allows water to drain underneath the patio instead of pooling. Without it, your patio will sink and crack.

On top of the gravel, spread 1 to 2 inches of coarse sand. Rake it smooth and level. This is the bed where your pavers will sit. Use your board and level again to make sure the sand slopes away from your house at the same angle as the soil below. The sand should be damp but not soaking wet when you lay pavers — if it's too dry, it won't compact; if it's too wet, the pavers will sink unevenly.

Lay the pavers and tap them level

Start at the corner closest to your house and work outward. Set the first paver on the sand bed and tap it down with a rubber mallet until it sits firmly. Use your level to check that it's flat in both directions. Adjust by adding or removing sand underneath if needed.

Lay the next paver beside or in front of the first, leaving a gap of about 1/4 inch (or whatever the manufacturer recommends). Tap it level. Continue row by row, checking every few pavers with your level to make sure you're not drifting out of plane. If a paver is too high, tap it down; if it's too low, lift it out, add a bit more sand, and reset it. This takes time but prevents a wavy surface.

When you reach the edge, you'll need to cut pavers to fit. Mark the cut line with chalk, then use a wet saw (which you can rent) or a paver splitter to cut them. Wet saws are faster and cleaner but require water and electricity. Splitters are slower but quieter and don't create dust.

Fill the joints and compact the surface

Once all pavers are laid and level, sweep sand into the gaps between them. You can use regular play sand or polymeric sand, which hardens slightly when wet and resists weeds better. Spread it across the surface and sweep it into every joint until they're full. Mist the patio lightly with water to help the sand settle, then sweep again and refill any gaps that have sunk.

If you used polymeric sand, follow the manufacturer's instructions for watering — usually a light mist, not a heavy spray. Let it cure for 24 to 48 hours before walking on it heavily. Regular sand will need to be topped up occasionally as it washes away or settles, but polymeric sand is more durable.

Maintain your patio so it lasts

Sweep your patio regularly to prevent dirt and leaves from breaking down and creating soil where weeds can grow. Every year or two, refill the joints with sand if they've eroded. If weeds do appear between pavers, pull them by hand or spray them with a herbicide made for patios — avoid bleach, which can stain the pavers.

In cold climates, freeze-thaw cycles can crack pavers over time. There's no way to prevent this entirely, but proper drainage underneath (the gravel and sand base) reduces how much water gets trapped and freezes. If a paver cracks, you can remove it, replace it with a new one, and refill the joints. This is one advantage of a patio over poured concrete — individual pavers are replaceable.

Frequently Asked Questions

Do I need to use polymeric sand or regular sand?

Regular sand works fine and costs less, but it washes away in heavy rain and needs refilling every couple of years. Polymeric sand hardens when wet and lasts longer, but it's more expensive and requires careful watering during installation. For a small patio, regular sand is usually the better choice. For a large one you want to maintain less often, polymeric sand pays for itself.

What if my yard doesn't slope away from the house?

You'll need to add soil to create the slope before you dig the patio bed. Spread soil across the area and compact it so the ground tilts away from your house at about 1 inch per 8 feet. This is worth doing right — a flat or backward-sloping patio will collect water and cause problems under your house.

Can I lay a patio on top of existing concrete?

Yes, if the concrete is in good condition and drains properly. Clean it thoroughly, fill any cracks with concrete filler, and lay pavers directly on top using a thin bed of sand. You don't need the full gravel base if the concrete underneath is solid and level. However, if the concrete is cracked, settling, or slopes toward your house, fix those problems first or the patio will follow the same issues.

How long does it take to lay a patio?

Preparation (removing sod, compacting, laying base) usually takes one full day for a 100-square-foot patio. Laying pavers takes another day or two depending on how many cuts you need and how careful you are with leveling. A small patio (under 50 square feet) can be done in a weekend. Larger ones may take two weekends.

What should I do if pavers start sinking after a few months?

Settling usually means the base wasn't compacted enough or the sand bed was too loose. You can reset individual pavers by lifting them out, adding more compacted sand underneath, and tapping them level again. If many pavers are sinking, the whole base may need work — this is why compacting properly at the start saves trouble later.