Paver Sand

These are not the same material even though both get called paver sand. Bedding sand is a coarser, washed concrete sand spread in a 1 inch layer over the compacted gravel base. Its job is structural leveling, giving every paver a uniform, stable seat. Joint sand is finer and goes in after the pavers are set, swept across the surface and worked down into the gaps to lock units together against lateral shift. Polymeric sand is regular fine joint sand blended with a polymer binder. It is bagged rather than sold loose because the binder has to stay dry until the installer is ready to activate it with water on site, an open bulk pile would harden or clump before use. Once wet and cured, it resists washout far better than plain sand, which is why it is common in wet climates, sloped patios, or anywhere heavy rain or sprinklers hit the joints directly. Plain sand is cheaper and easier to resweep, a reasonable call for sheltered, low traffic areas.

Start with a compacted gravel base, not bare soil. Sand is not a substitute for that structural layer. Set screed rails or pipes at the height needed for a 1 inch sand layer, dump the sand between them, and drag a straight board across the rails to strike it level. Do not compact this layer with a plate compactor before laying pavers, screeding alone should leave it firm enough to hold shape while pavers are set into it. Once the pavers are down, sweep joint sand across the surface and run the plate compactor over the whole patio to vibrate sand down into the joints and seat the pavers into the bed. Repeat the sweep and compact pass a second time to fully fill joints, since the first pass rarely fills them completely. Keep bedding sand dry during screeding, damp sand clumps and will not strike off level.

Compared with polymeric sand. Polymeric sand is plain fine sand with a polymer binder added, applied the same way but hardened with water afterward to resist washout and weeds. Plain paver sand costs less and is easier to fix, a fair trade for low traffic, well drained, tightly jointed areas.

Compared with paver base (crushed stone). Paver base is the coarse, angular compacted aggregate that forms the structural foundation beneath the sand. Sand only levels the top inch, it never replaces the compacted base and will not support driveway or heavy traffic loads on its own.

How much sand do I need. A cubic yard covers about 324 square feet at a 1 inch bedding depth. Measure your patio or walkway square footage, divide by 324, then add about 10 percent for waste, screeding loss, and settling. Joint sand volume is much smaller, figure it separately based on joint width and paver spacing rather than folding it into the bedding estimate.

How it is sold and delivered. Paver sand is sold in bulk by the cubic yard for larger jobs and delivered loose by dump truck to the driveway or job site, which is the practical way to handle the volume a patio or walkway bedding layer requires. Bagged sand, including polymeric blends, covers small joint fill top offs or projects too small to justify a bulk load. Order by weight if moisture content is a concern, since wet sand runs noticeably heavier per yard than dry.