How to Lay Pavers on a Sand Base (Small Path)
I had a job out in Dianella a few summers back, owner had paid a “landscaper” three grand for a 12-metre paver path that had slumped twice in two winters. I went to look at it and you could see what he’d done — bedding sand over bare clay, no road base, no edge restraint, and a fall that ran toward the house. By the time I’d dug it up the path was sitting in puddle of grey clay slurry. Did the job properly with road base, screeded sand, polymeric joints, and edge restraints, and that path is still flat in 2026. Heres the thing: those Bunnings bags labelled “paver base” — yellow bag, looks like clean sand? That’s bedding sand. It goes on top of the actual base, not as the base itself. Wrong product for the job. If you build a path on bedding sand alone, you’ll be relaying it within two summers because it slumps every time it rains. Worth doing once, worth doing right.
I lay paths the way the council guys lay them, just scaled down for a backyard. Compacted road base for the structure, a 30mm screeded sand bed for levelling, pavers, then polymeric sand in the joints. Done properly, that path outlasts the house. Done with sand only and no compaction, you’ll be redoing it in 2027.
This article is for a small path — say 600mm wide, up to eight metres. If you’re doing a full driveway, get a contractor with a laser level and a hired compactor. For a side path or a courtyard, here’s the routine.
What you’ll need
- Road base (crushed rock 20mm minus, or “crusher dust” at some yards) — order from a local landscape supply, not Bunnings; about 100mm depth times your path area
- Bedding sand (white washed sand or “paver bedding sand”) — 30mm depth
- Polymeric sand — Brunnings or Gap Sand from Bunnings; one bag per 5 square metres of path
- Pavers — order 5 percent extra for cuts and breakages
- Plate compactor hired from Kennards for a half day, about $90
- 1.2m spirit level, rubber mallet, builder’s string line, marking paint
- Long screed board — a straight 100×50 timber works fine
- Wheelbarrow, square-mouth shovel, geotextile fabric (optional but good in reactive clay)
- Edge restraints — Quikedge plastic, or 100×50 treated pine pegged with 300mm steel pins
Step 1: Mark the path and check the fall
Spray-paint the outline. Run a string line along each edge at finished paver height. Now check the fall. Pavers must drain at minimum 1:80 (about 12mm per metre) AWAY from the house. No fall equals puddles equals moss equals slip hazard. Too much fall and water races, scouring out joints and undermining the edge. Aim for 1:60 to 1:80. Use the spirit level on a long straightedge with a small packer at one end to verify.
Step 2: Excavate to depth
Total dig depth equals paver thickness, plus 30mm sand, plus 100mm road base. A standard 50mm paver gives you 180mm dig. Mark a stick with that depth and use it as a gauge. Square the sides — sloppy excavation walls collapse and contaminate the base. Carting the spoil away is easier if you’ve got a ute or a trailer; if you don’t, ring a skip company and have a 2 cubic metre skip dropped for the weekend, $200ish. Bagging up dirt is a young person’s game and I’m done with it.
Step 3: Cut the fall INTO the subgrade — the Aussie clay gotcha
This is the bit nobody on YouTube tells you. Sydney shale, Melbourne clay, parts of Adelaide and Perth — these soils move 30mm seasonally. Wet winter equals swell. Dry summer equals shrink. If your fall is cut only into the sand layer, the sand follows the clay and your fall disappears the first wet July. Cut the fall into the actual clay subgrade. Use the long screed board across the excavation with a spirit level shimmed at one end — a 12mm packer per metre of length gives you 1:80 — and check the floor of your excavation drops at the right angle. The road base, sand and pavers all just follow this. The clay is what controls the long-term drainage.
Step 4: Lay geotextile (in clay soils)
If you’re on reactive clay — most of Sydney west of Strathfield, most of inner Melbourne, parts of Adelaide and the Perth Hills — drop a layer of geotextile fabric over the dirt before the road base goes down. Stops the road base migrating into the clay over years. About $40 a roll from Bunnings or any landscape yard. Coastal sand soils dont need this — pure sand drains too well to be a migration problem.
Step 5: Spread and compact the road base
Spread the road base in two 50mm lifts. Wet each lift lightly with the hose — barely damp, not soggy — then run the plate compactor over it four passes. Don’t try to dump 100mm in one go and compact it; you’ll get a soft middle that fails inside a season. Two lifts. Always. The plate compactor sounds aggressive but its doing the real structural work — this is what makes the path last.
Step 6: Set screed rails and lay the bedding sand
Lay two lengths of 25mm conduit pipe along the path, sitting on the compacted road base, parallel to the path direction, at the correct height for sand-bed top. Pour bedding sand between them. Pull your screed board across the conduits — sand levels off perfectly to 25mm. Pull the conduits out and fill the channels with sand. Don’t walk on the screeded sand. Don’t compact it. Compacted bedding sand defeats the whole point of having a levelling layer.
Step 7: Lay the pavers
Start at one end against a fixed edge — wall, edge restraint, anything solid. Lay each paver gently. Don’t slide it across the sand or you’ll plough furrows. A 2-3mm gap between pavers is the goal; some pavers have spacer lugs that set this for you. Tap each one level with the rubber mallet. Check across three pavers with the spirit level constantly. Working off a wide knee pad saves your legs on a long path.
Step 8: Cut the edges
You’ll have edge cuts at the end of each row. Mark with a chinagraph pencil, cut with a wet saw (Kennards hire, $50 a half day) or a brick bolster and lump hammer if you’re old-school. Wear earplugs and safety glasses. Granite and bluestone pavers will eat a cheap diamond blade — buy a decent blade or hire a cutter that comes with one included. The cheap blades shed segments and are genuinely dangerous.
Step 9: Install edge restraints
Pavers laid on sand WILL spread sideways without an edge restraint. Quikedge — the black plastic L-section — pegged every 300mm with 300mm steel pins is the easy option. Treated pine 100×50 pegged the same way works on rustic paths. Concrete haunching works on driveways. Pick one. Don’t skip it. The path spreads 5-10mm a year without restraint, joints open, polymeric sand cracks out, and weeds invade the gaps. A weekend job becomes an annual chore.
Step 10: Polymeric sand and final compaction
Sweep polymeric sand into the joints. Polymeric — not regular sand. Polymeric contains a binder that activates with water and locks the joints. Regular sand washes out with the first heavy rain. Mist the path with the hose set to fine spray (not jet) until the sand is wet through but not flooded. Let it cure 24 hours. Then run the plate compactor over the finished pavers — fit a rubber pad to the plate first or you’ll chip them — for two passes. That seats everything and the path is done.
When to call a tradie or pro
Two situations where I tell people not to DIY. Driveway pavers on a slope — anything steeper than about 1:20 (call it 50mm fall per metre) needs a proper paver-laying contractor with concrete haunching. The forces on a sloping paver driveway under the weight of a car are not the same as a flat backyard path. Get it wrong and you’ve got slipping pavers and a cracked driveway. Large-format natural stone — 600×600 bluestone or travertine, 1.2m granite slabs — these need a mortared bed on a proper concrete sub-base, not sand on road base. Mortared paving is a paver’s licensed trade-equivalent skill and worth paying for. Cheaper to do once.
Common screw-ups
- “Just sand, no base”: looks great for one summer, slumps in winter, owner relays on the same sand and it slumps again. Always road base.
- No edge restraint: path spreads sideways, joints open, weeds invade. Quikedge or pine, install on day one.
- Reverse fall toward the house: water drains under the slab. Termites and rising damp follow. Always check fall with the spirit level before committing.
- Regular sand in joints: washes out in the first storm. Polymeric only.
- Skipping the plate compactor: hand-tamped road base settles unevenly. Hire the compactor for $90 a half day. Always.
Cost & time
For a small 5 square metre path: road base $80, bedding sand $30, polymeric sand $30, edge restraint $40, plate compactor hire $90. Pavers depend on choice — National Masonry concrete pavers $20/sqm; bluestone $80-120/sqm. Total materials $200-700, plus pavers. Time: one long Saturday for the dig and base prep, one Sunday for laying and polymeric. Two-day weekend job, no worries.
Bunnings paver base is bedding sand, not base. Road base is the structure, sand is the levelling layer, polymeric is the sealant. Three layers, three jobs. And the fall belongs in the clay, not in the sand. Get those two right and you’ll never relay a path in your life. The sand-only shortcut version is the path that cracked apart by 2027. While you’ve got the plate compactor on hire, knock out the garden shed base the same weekend, and if your old path was a pressure-wash candidate, our driveway pressure-wash guide covers safe nozzle choices. If the path runs past your hedge run, time the hedge trim to the paver job — both look better fresh together. Beauty.
