Hardscaping in Delaware on Sand and a High Water Table

Patios, walls, driveways and the rest

Most Delaware projects start with a paver patio or a paver driveway. Both put the most surface area on the ground, so both depend on the base beneath them. From there, the work branches into the other structures that connect a property.

• Walkways and steps that cross sandy yards without shifting
• Pool decks and coping built to shed water fast
• Grading and drainage that moves water away from the house
• Outdoor kitchens and fire pits for screened porches and sunrooms
• Gravel driveways on a compacted stone base
• Retaining walls for sloped lots

What happens after you call

The process starts with a written price, not a promise. You get a number in writing before any digging begins. That price covers the base, the edge restraint, the pavers, and the labor to compact everything in place.

You need to be present to confirm the layout and the paver choice. You do not need to be there while the crew prepares the ground. The process page walks through each step. The cost guide explains what goes into the number you receive.

What moves the price up or down

Sand and a high water table put the cost in compaction and edge restraint, not in the digging. The excavation is shallow and the season is long, which keeps the base cost down. The labor is in getting the base dense and keeping the edges from spreading.

In Kent and Sussex, the sand compacts quickly when dry, but wet ground near the coast delays the work. In New Castle County, the clay and silt loam need different handling. Those conditions shape the price more than the size of the patio does.

Sand does not fail. It migrates.

Sand holds weight well when it is confined. The problem starts when it moves. Rain pushes fine sand sideways, and foot traffic pumps it out from under a paver edge. That is how a patio sinks in the middle and spreads at the outside line.

The edges fail first. Without a solid edge restraint, the pavers at the perimeter walk outward a fraction of an inch each season. The gap grows, the sand washes through, and the surface drops. This happens fastest where the water table is high, because saturated sand carries more easily than dry sand does.

The fix is not a thicker paver. It is a compacted base that holds the sand in place and an edge restraint that locks the perimeter. That applies on the sandy coastal plain in Sussex County and the beaches, and it applies in Dover and Kent County. Wilmington and New Castle County have heavier soil, but the same rule holds: stop the migration and the surface stays put.

The bed under the pavers

Every installation starts with excavation to the right depth. The crew places GABC Type B in lifts and compacts each layer before adding the next. Loose sand does not get a patio set on top of it. The base is specified by DelDOT type, and the yards may call it crusher run, but the spec is the same.

A high water table changes the drainage detail. The crew slopes the base so water moves sideways and out, not down into a saturated zone. Edge restraint is set in concrete along the perimeter. The setting bed goes on top, screeded flat, and the pavers are compacted into it.

Pool decks get the same treatment, because standing water next to a pool finds every gap. Screened porch floors and sunroom additions sit on the same compacted base, so they do not settle differently from the house. Beach house decks near the coast get extra attention to edge restraint, since the sand is deepest there.

Work runs year round with a slow stretch in the coldest weeks. Wet ground near the coast delays compaction more than frost does, so the crew schedules around the weather rather than fighting it.