Paver Installation Guide: Base Prep, Sand, and Layout Patterns

Pavers Only Look Good If the Base Is Right

Every paver installation that shifts, settles, or grows weeds has the same root cause: the base wasn't done right. The pavers themselves are the easy part. They're strong, they interlock, and they handle freeze-thaw cycles well. But put them on an inadequate base and gravity and water will rearrange them within a couple of seasons.

A proper paver installation is 80% base preparation and 20% laying pavers. If you skip or shortcut the base work, no amount of careful paver placement will save the project. This guide walks through every step, from the first shovel of dirt to the final compaction pass.

Step 1: Excavation

The total excavation depth depends on the intended use and your soil conditions:

• Pedestrian patios and walkways: 7–9″ total (4″ gravel base + 1″ bedding sand + 2-3/8″ paver thickness)
• Driveways and areas with vehicle traffic:10–13″ total (6–8″ gravel base + 1″ sand + paver thickness)
• Poor soil (clay, organic, high water table): Add 2–4″ additional gravel depth and consider geotextile fabric between subgrade and base material

Excavate the full area plus 6–12″ beyond the paver edge on all sides to give room for edge restraints and compaction equipment. Set string lines at the finished paver height and work backward to establish your excavation depth. Maintain a minimum 1% slope (1/8″ per foot) away from structures for drainage.

Step 2: Subgrade Compaction

After excavating, the exposed subgrade (native soil) needs to be compacted to prevent future settling. Use a plate compactor and make at least two passes over the entire area. If the soil is too dry, mist it lightly — damp soil compacts better than bone-dry soil.

Soft spots or areas with organic material should be dug out and backfilled with granular material. A layer of non-woven geotextile fabric over the compacted subgrade prevents fine soil particles from migrating up into the gravel base over time, which is the primary cause of base contamination and eventual settling in clay-heavy soils.

Step 3: Gravel Base

The gravel base is the structural layer that distributes load and provides drainage. Use processed gravel (sometimes called “road base,” “Class II,” or “3/4-minus”) — crushed stone with angular edges and a range of particle sizes from 3/4″ down to fine dust. The fines fill the voids between larger stones, creating a dense, stable layer when compacted.

Do not use rounded gravel or pea stone for the base.Rounded stones roll against each other and never lock together no matter how much you compact them. Angular, crushed material is essential.

Install the gravel in lifts (layers) of no more than 2″ at a time. Compact each lift with a plate compactor before adding the next:

• For a 4″ base: two lifts of 2″ each, compacted separately
• For a 6″ base: three lifts of 2″ each
• For an 8″ base: four lifts of 2″ each

Trying to compact a full 6″ layer in one pass doesn't work. The compactor can only effectively consolidate about 2″ of material per pass. Skipping this step is the single most common cause of paver failure.

Step 4: Bedding Sand

The bedding layer goes on top of the compacted gravel base. Use concrete sand (also called C-33 sand or coarse washed sand) — not mason sand, play sand, or polymeric sand. The bedding layer should be exactly 1″ thick after screeding and before pavers are placed.

To screed accurately, set two 1″ diameter pipes (or 1″ square steel tubes) on the compacted gravel base, parallel to each other and about 4–6 feet apart. Spread sand over and between them, then drag a straight screed board across the pipes to create a flat, uniform 1″ layer. Remove the pipes and fill the grooves with sand.

Do not compact the bedding sand before placing pavers.It needs to stay loose so the pavers can settle into it slightly during final compaction. Also, do not walk on or disturb screeded sand — screed only the area you can pave in a session.

Step 5: Edge Restraints

Without edge restraints, pavers along the perimeter gradually creep outward, opening gaps and loosening the entire field. Edge restraints are non-negotiable, even on patios that seem “contained” by a house wall or garden bed.

Options include:

• Aluminum or plastic paver edging (Snap-Edge or similar): Spikes anchor it into the gravel base. Most common for residential work. Install after the pavers are laid and cut, flush against the last row.
• Concrete curbing or soldier course: A row of pavers set in mortar or concrete on the perimeter. More permanent and heavier-duty. Common for driveways and commercial work.
• Existing structures: A house foundation, concrete slab edge, or retaining wall can serve as one or more edges. Make sure there's solid contact — a gap between the last paver and the structure allows lateral movement.

Step 6: Laying Pavers and Choosing a Pattern

Start from a straight reference edge (the house, a string line, or one finished edge) and work outward. Place pavers directly onto the screeded sand without sliding them — set each one straight down to avoid displacing sand underneath. Maintain consistent 1/8″ spacing between pavers using built-in spacer bars or by eye.

The three most common patterns:

• Running bond (offset): Each row is offset by half a paver length, like a brick wall. The simplest pattern to install and generates the least cutting waste. Works well for walkways, patios, and any rectangular area.
• Herringbone (45° or 90°): Pavers interlock in a zigzag pattern. Provides the best interlock and load distribution — the ICPI (Interlocking Concrete Pavement Institute) recommends herringbone for all vehicular applications. More cutting required at edges, especially at 45°. Budget 10–15% waste for herringbone vs. 5–8% for running bond.
• Basketweave: Pairs of pavers alternate horizontal and vertical. Creates a traditional, formal look. Not as strong as herringbone for vehicular use, but fine for pedestrian areas. Cutting waste is moderate.

Cutting Pavers

You'll need to cut pavers at edges, curves, and around obstacles. A wet saw with a diamond blade produces the cleanest cuts and the least dust. For straight cuts on a job site without a wet saw, a gas-powered cutoff saw (demo saw) works well but generates significant dust — wear a respirator and eye protection.

For small jobs or a few angle cuts, a 4-1/2″ angle grinder with a diamond blade handles individual pavers quickly. Score and snap works for some paver types but leaves a rough edge.

Never install a cut piece smaller than one-third of a full paver. Small pieces don't interlock properly and will eventually pop out. If the layout requires a small sliver at an edge, adjust the starting point to avoid it.

Step 7: Compaction and Joint Sand

After all pavers are laid and edges restrained, sweep concrete sand (same C-33 used for bedding) or polymeric sand into the joints. Spread it over the surface and sweep it into every gap. Then make at least two passes with a plate compactor fitted with a rubber pad (to prevent scuffing the paver faces).

Compaction does two things: it sets the pavers into the bedding sand (about 1/8–1/4″) and vibrates the joint sand down into the gaps. After compacting, sweep in additional sand and compact again. Repeat until the joints are completely filled.

If using polymeric sand, follow the manufacturer's instructions precisely. Polymeric sand contains a binder that activates with water, hardening the joints to resist weed growth and insect intrusion. The critical steps: sweep off all excess from paver surfaces before watering (any residue will leave haze marks), apply water gently with a shower nozzle, and allow 24 hours to cure before traffic.

Drainage Considerations

Water is the enemy of any hardscape. Proper drainage prevents base washout, frost heaving, and settling:

• Surface slope: Maintain a minimum 1% slope (1/8″ per foot) on the finished paver surface away from buildings and toward a drainage area. 2% is better for larger patios.
• Base drainage: The gravel base is naturally free-draining. On sites with poor percolation (heavy clay), consider a perforated drain pipe at the low edge of the base, wrapped in filter fabric and daylit to a suitable discharge point.
• Permeable pavers: An alternative for areas where stormwater management is a concern. Permeable paver systems use open-graded (no fines) base material and wider joints filled with small aggregate, allowing water to infiltrate through the surface into the ground. Check local codes — some jurisdictions offer stormwater credits for permeable hardscapes.

Use our Paver Calculator to determine the number of pavers, gravel base volume, and bedding sand needed for your project. Pair it with the Concrete Volume Calculator if your design includes a concrete border or soldier course.