How to Prep a Paver Base: The Complete Guide to Gravel, Bedding Sand & Polymeric Joint Sand

You can buy the most beautiful pavers in the world and still end up with a failing project if the base isn't right. Settling, shifting, cracking, and drainage problems all trace back to base preparation. Here's how to do it correctly, whether you're a contractor or a motivated homeowner in Western NC.

Layer 1: Subgrade Preparation

Start by excavating to the right depth. For a typical patio or walkway:

• Pedestrian use: Excavate 8–10" below finished grade (6" gravel base + 1" bedding sand + paver thickness)
• Vehicular use (driveways): Excavate 12–14" below finished grade (8–10" compacted gravel base + 1" bedding sand + paver thickness)

Remove all organic material (roots, topsoil). Compact the native subgrade to 95% Proctor density. Soft or clay-heavy soils may need geotextile fabric to prevent base material from migrating downward. In Western NC, the clay-heavy mountain soil makes this step especially important.

Layer 2: Compacted Gravel Base

The base layer does the structural heavy lifting. You want angular crushed stone — not river gravel or pea gravel — because angular aggregate compacts tightly and locks together.

• Best choice: Crusher run (also called road base or ABC stone) — a blend of crushed stone and fines that compacts excellently
• Layering rule: Compact in lifts no thicker than 4". If you need 8" total base depth, compact a 4" lift, then add and compact a second 4" lift.
• Compaction equipment: Use a plate compactor for most areas; a jumping jack compactor for narrow trenches

Find base aggregate and crushed stone in our Gravel, Sand & Soil collection.

Layer 3: Bedding Sand (Screeding Layer)

Bedding sand goes directly under the pavers and provides a level, easy-to-screed surface. The standard is coarse concrete sand (ASTM C33) — also called torpedo sand or coarse washed sand.

• Apply at exactly 1" depth (no more — thicker sand is unstable under load)
• Screed flat using pipes set 1" above the gravel base as guides
• Do not compact the bedding sand before setting pavers — pavers are set into it, then vibrated down during compaction
• Do not use stone dust or limestone screenings as a bedding layer — these absorb moisture and can cause heaving in freeze-thaw cycles

Browse our Gravel, Sand & Soil collection for bedding sand options. Find screeding pipes, levels, and other tools in Paver Tools & Supplies.

Layer 4: Paver Setting & Compaction

Once pavers are set in place:

1. Run a plate compactor over the entire surface to vibrate pavers into the bedding sand — use a rubber pad protector on the plate to avoid scuffing paver faces
2. Add edge restraint around the perimeter before or immediately after compaction
3. The surface should be firm, with no rocking or movement in individual pavers before you apply joint sand

Layer 5: Joint Sand — Regular vs. Polymeric

Joint sand locks pavers together and keeps out weeds, ants, and water infiltration. You have two main options:

Regular Joint Sand

• Coarse washed sand swept into joints and re-applied as needed
• Less expensive upfront; may need periodic re-application
• Allows some water infiltration — better for areas where you want permeable drainage
• Can allow weed growth over time if not maintained

Polymeric Sand

• Sand mixed with polymer binders that harden when activated with water
• Locks joints firmly — resists weed growth, ant erosion, and washout
• Best for most driveways, patios, and walkways where you want a low-maintenance finish
• Application tip: Sweep into joints, plate-compact, blow off excess (important!), then mist with water to activate. Follow manufacturer instructions carefully — the surface must be dry before misting.
• Not recommended for joints wider than your product's rated maximum (usually 1.5–4" depending on brand)

We stock both joint sand options — find them in our Gravel, Sand & Soil collection and browse application tools in Paver Tools & Supplies.

Quick Material Estimator

• Crushed stone base (6" depth): ~1 ton per 50 sq ft
• Bedding sand (1" depth): ~0.5 ton per 50 sq ft
• Polymeric sand: Typically covers 15–25 sq ft per 50 lb bag, depending on joint width and paver size

Get the Right Materials at Clark & Co.

We carry everything you need for a proper paver base installation — from compactible gravel and bedding sand to polymeric joint sand and installation tools. Visit our Gravel, Sand & Soil and Paver Tools & Supplies collections to stock up, or stop by to talk through your project.

Proudly serving contractors and homeowners across Western NC, including Franklin, Sylva, Murphy, Bryson City, and surrounding mountain communities.