Foundation Tunneling in Savannah, GA

Foundation tunneling creates access beneath a slab foundation so repairs, pier installation, and plumbing work can be done from below — without jackhammering through your finished floors. It keeps your home livable during under-slab work.

Why Tunneling Is Used

When a slab home needs pier installation, void filling, or a plumbing repair beneath the foundation, tunneling reaches the work area from outside the home. This protects interior finishes, avoids relocating the household, and keeps the mess outside.

What Tunneling Includes

• Planning the tunnel route and access points
• Hand-excavated tunnels sized for the repair
• Under-slab pier, void filling, or plumbing work
• Proper backfill and compaction to restore support
• Site restoration

When Tunneling Makes Sense

• Under-slab plumbing leaks or repairs
• Pier installation beneath a slab foundation
• Preserving finished floors and staying in the home
• Access that would otherwise require interior demolition

What Foundation Tunneling Is and Why Savannah Homes Need It

Foundation tunneling is a hand-dug excavation method that lets a crew reach
the piers, grade beams, and under-slab plumbing beneath your home without
jackhammering through your interior floors. Instead of breaking the concrete
slab from the inside, technicians dig a horizontal tunnel from the exterior
perimeter and bore underneath the structure to the exact work area. For many
Savannah and coastal Georgia homeowners, this is the difference between
keeping their tile, hardwood, and daily routine intact and living through
weeks of interior demolition, dust, and displaced furniture.

Tunneling matters most when the problem is deep under the slab: a failing
cast-iron or clay sewer line, a slab leak on a supply line, or the need to
install support piers and underpinning to correct settlement. Because coastal
Georgia sits on soft, moisture-heavy soils, under-slab repairs are common
here, and tunneling gives our crews clean access to fix the root cause. If you
are also dealing with cracks or uneven floors, tunneling often pairs with
broader
foundation repair so
the structural and plumbing issues are solved at once.

How Solid Foundation Repair Of Savannah Tunnels Under a Home

The process is methodical, and doing it correctly protects both your home and
our crew. Solid Foundation Repair Of Savannah follows a controlled sequence on
every tunneling project:

• Diagnosis first. For plumbing failures, a hydrostatic test
  fills the drain lines with water to confirm whether they hold, isolating the
  leak location before any digging begins.
• Access shaft. The crew opens a vertical entry at the
  foundation perimeter, then turns horizontal to begin the tunnel.
• Hand excavation. Workers dig a roughly three-foot by
  three-foot tunnel with specialized shovels, sized to give a plumber or
  foundation technician room to work and bring tools underneath the slab.
• Shoring as needed. In loose or wet ground, the tunnel walls
  are braced to prevent collapse and keep the excavation safe and stable.
• The repair. The technician replaces damaged pipe with new
  PEX or copper, or installs piers and underpinning to lift and stabilize the
  foundation.
• Backfill and compaction. The same soil is returned to the
  tunnel and compacted in layers so the ground does not settle later.

Because the entire operation happens outside and beneath the home, your
interior floors, cabinets, and living space are never disturbed.

Tunneling vs. Breaking Through the Slab

Every under-slab repair comes down to two paths: cut through the slab from
inside, or tunnel in from outside. Each has trade-offs, and the right call
depends on where the failure is and how much of the plumbing needs work.

• Breaking the slab can be quicker and cheaper for a single,
  easy-to-reach leak, but it means jackhammers indoors, torn-up flooring, dust
  throughout the house, and rooms you cannot use during the work. Flooring
  replacement often adds significant cost afterward.
• Tunneling keeps the mess outside, leaves your slab and
  finishes untouched, and lets the crew reach multiple repair points through a
  single tunnel. It typically costs more and takes longer for a long run, but
  for extensive or multiple failures it avoids weeks of interior disruption
  and flooring damage.

In short: one isolated pinhole leak near the perimeter may favor a small slab
cut, while multiple breaks, a full sewer replacement, or any repair under
finished flooring usually favors tunneling. We walk Savannah homeowners
through both options honestly before recommending a route. Call
(912) 642-3890 to talk through your situation.

Coastal Georgia Soil and Water Table Challenges

Tunneling under a home in the Lowcountry is not the same as tunneling on high,
dry ground. Savannah, Chatham County, and the surrounding coastal plain are
known for sandy soils and a high water table, and both factors directly affect
how a tunnel must be dug and braced. Sandy ground can silt into an open
excavation and undermine tunnel walls, especially below the water line, so
shoring and careful excavation are essential rather than optional.

• Dewatering. When groundwater is present, the excavation may
  need wellpoints or pumps to draw the water level down and keep the tunnel
  workable and safe.
• Shoring for loose sand. Sandy, water-bearing soil is prone
  to caving, so tunnel walls are supported to protect the crew and the
  structure above.
• Settlement awareness. Dewatering loose sand can cause minor
  settlement, which is why proper backfill compaction and, where warranted,
  underpinning are part of the plan.

Handling these coastal conditions correctly is exactly why local experience
matters. A crew that understands Savannah ground plans the tunnel, shoring,
and dewatering together instead of improvising once water shows up.

When Tunneling Is the Right Choice

Tunneling is usually recommended when the repair is deep under finished living
space and cutting the slab would cause more damage than the fix itself.
Consider tunneling if you have under-slab sewer or supply-line leaks beneath
tile or hardwood, if multiple breaks exist along a line, if you need piers or
underpinning installed beneath the slab, or if you simply cannot vacate the
home for interior demolition. For a single accessible leak at the perimeter, a
targeted approach may be enough.

Solid Foundation Repair Of Savannah has served the Savannah area and coastal
Georgia since 1989 and is licensed and insured. If you suspect an under-slab
plumbing failure or foundation settlement, reach out for a
free estimate and we will assess whether tunneling
is the smartest, least disruptive path for your home.