Concrete Slab Repair in Savannah, GA

Concrete slab repair fixes cracked, sunken, and uneven slabs — patios, walkways, garage and shed floors, and porches — that shift as Savannah’s clay soils swell and settle beneath them.

Why Slabs Crack and Sink Here

Flat concrete poured over reactive coastal soil moves as that soil expands with moisture and shrinks in dry spells. Washout and voids beneath the slab remove support, causing cracks, trip hazards, and pooling water.

What Slab Repair Includes

• Assessment of cracking, settlement, and voids
• Polyurethane foam lifting and re-leveling
• Crack repair and joint sealing
• Void filling beneath the slab
• Surface finishing to blend the repair

Signs You Need Slab Repair

• Cracked or uneven exterior slabs
• Trip hazards where sections have dropped
• Water pooling on patios or walkways
• Gaps between slabs and the house

Why Concrete Slabs Crack and Sink in Savannah, GA

Most slab problems in Savannah trace back to what is happening in the ground
beneath the concrete, not the concrete itself. Poured slabs — interior floors,
garage pads, patios, driveways, and walkways — depend on continuous, evenly
compacted soil support. When that support disappears, the slab loses its
footing and settles, cracks, or tilts. Coastal Georgia’s sandy soils and
shallow water table make this a common story across Chatham County.

The recurring culprits we see include:

• Void formation under the slab: Sandy coastal soil is highly
  permeable. Water flows through it fast and carries fine particles away,
  hollowing out cavities beneath the concrete that once carried its weight.
• Water table and drainage: Savannah’s high, fluctuating
  groundwater table washes out finer soil layers, and each wash-out opens the
  path for more erosion under the slab.
• Poor original compaction: If the base was not compacted
  properly before the pour, the soil keeps compressing unevenly for years,
  leaving gaps and hollow pockets.
• Repeated wet-dry cycles: Heavy rain and coastal humidity
  swing the soil between saturated and dry, and that constant movement
  fatigues the support underneath.

Signs Your Savannah Slab Needs Repair

Concrete rarely fails without warning. Catching the early symptoms lets us
lift and stabilize a slab before it fractures beyond a simple fix. On Savannah
properties, watch for:

• Sunken or tilted sections where one part of a patio, walkway, or garage
  floor sits noticeably lower than the rest.
• Cracks that keep widening, or slabs that have separated at a joint or seam.
• A hollow sound when you tap or walk across the slab — a strong sign of a
  void underneath.
• Pooling water on a patio or driveway that used to drain, indicating the
  surface has shifted out of level.
• Trip hazards where slab edges have lifted or dropped, common on aging
  Savannah sidewalks and entryways.
• Surface spalling — flaking or pitting — which points to moisture intrusion
  and worn concrete.

Concrete Slab Leveling Methods We Use in Coastal Georgia

The goal of slab leveling is to fill the void beneath the concrete and raise
the slab back to its original position without tearing it out. There are two
established approaches, and the right choice depends on the slab, the soil,
and the load it carries.

• Polyurethane foam lifting (polyjacking): A high-density
  expanding foam is injected through small holes — roughly the diameter of a
  coin. The foam expands, fills every void, and applies controlled upward
  pressure to raise the slab with precision. It is lightweight (about 2 to 4
  pounds per cubic foot), so it will not overload already-eroded coastal soil,
  and it is waterproof and resists the erosion that undermined the slab in the
  first place. It also cures in minutes, so a driveway or garage is usable
  almost immediately.
• Mudjacking (slabjacking): A cement-and-sand slurry is
  pumped through larger holes to fill the cavity and lift the slab. It is a
  proven traditional method, but the slurry is heavy — up to 100 pounds per
  cubic foot — and can wash out over time in wet, sandy ground, which is a
  real consideration in the Lowcountry.
• Void filling and crack repair: Where a slab sits level but
  is undermined, we fill the void to restore support and re-anchor the
  concrete. Structural cracks are sealed to keep water and further erosion
  out.

For a coastal Savannah property with sandy soil and a high water table, the
lightweight, water-resistant nature of polyurethane foam frequently makes it
the more durable long-term solution. Every slab is evaluated on its own
conditions before we recommend a method. Solid Foundation Repair Of Savannah
will walk you through the options during a
free estimate.

Slab Repair vs. Full Replacement

Many homeowners assume a cracked or sunken slab has to be demolished and
re-poured. In most cases, that is not true — and repair is faster, cleaner,
and far less disruptive than replacement. Lifting an existing slab back to
level typically costs a fraction of tearing it out, and there is no curing
delay before you can use the surface again.

Replacement becomes the smarter path only when the concrete is severely
fractured throughout, crumbling from deep spalling, or too thin and
deteriorated to hold together when lifted. If the slab is structurally intact
but has simply lost its soil support, leveling almost always wins. When a
sinking slab is tied to a larger structural issue at the perimeter of the
home, it may connect to
foundation repair, and
we assess both together so you are not solving half the problem.

Protecting Your Slab After Repair

Lifting a slab solves today’s problem; keeping water away from it prevents the
next one. Because erosion drives most slab failure in Savannah and coastal
Georgia, drainage control is the single most effective way to protect your
investment. We recommend:

• Directing downspouts and gutters well away from slab edges so runoff does
  not undermine the soil.
• Grading the surrounding ground to slope away from patios, driveways, and
  garage pads.
• Sealing repaired cracks and joints to block moisture from re-entering the
  base.
• Watching for early re-settlement and addressing it before a new void grows.

If your concrete is cracking, sinking, or sounding hollow, have it evaluated
before the damage spreads. Call Solid Foundation Repair Of Savannah at
(912) 642-3890 to schedule an inspection
anywhere in the Savannah area.