Block and Base Foundation Repair in Savannah, GA

Block and base foundation repair restores homes built on concrete block piers set on poured footings — a common construction style across older Savannah neighborhoods. Over time, coastal moisture and shifting soils cause these supports to settle, tilt, or crumble, leaving floors uneven and framing unsupported.

Why Block and Base Homes Settle in Savannah

Block-and-base supports rely on stable soil beneath their footings. Savannah’s reactive clay and high water table cause footings to sink and heave, while moisture deteriorates mortar and block. The result is sloping floors, gaps at trim, and bouncing subfloors.

What Our Block and Base Repair Includes

• Inspection of every pier, footing, and beam in the crawl space
• Re-shimming and re-leveling of settled supports
• Replacement of cracked or deteriorated block and footings
• New supplemental piers where spans are unsupported
• Optional helical piers for deep, lasting support

Signs You Need Block and Base Repair

• Sloping, sagging, or bouncy floors
• Cracked or leaning block piers
• Gaps around doors, windows, and trim
• Visible moisture or rot in the crawl space

How Block-and-Base Foundations Work Under Older Savannah Homes

Many of Savannah’s older homes — from Victorian District cottages to
mid-century houses across Chatham County — sit on a block-and-base (also
called pier-and-beam or CMU pier) foundation rather than a poured slab.
Instead of resting on a continuous concrete pad, the house is carried by a
grid of individual masonry piers stacked from concrete blocks on a small
concrete footing, or “base.” Wood or steel shims sit on top of each pier, and
the wood beams (girders) and floor joists rest on those shims, leaving a crawl
space beneath the house.

This system was designed to lift living space above damp coastal ground and
allow air to circulate underneath — a sensible choice in a high-humidity
climate like coastal Georgia. But each pier is only as strong as its blocks,
its mortar, its shims, and the soil beneath its footing. When any one of those
elements fails, the load path breaks and the floor above starts to move.
Understanding the assembly is the first step toward a lasting
foundation repair.

Why Block-and-Base Piers Fail in Coastal Georgia

Savannah’s environment is especially hard on masonry pier systems. Several
factors work together to degrade block-and-base foundations across the
Lowcountry:

• Mortar joint deterioration: Decades of moisture cycling
  break down the mortar bonding the concrete blocks, so piers loosen, tilt,
  and lose their carrying capacity. This is common in pre-1960 construction
  throughout Savannah’s historic neighborhoods.
• High water table and crawl-space moisture: Coastal
  Georgia’s shallow water table and persistent humidity keep crawl spaces
  damp, corroding steel shims, rotting wood shims and beams, and softening the
  ground under footings.
• Expansive and shifting soils: Local soils swell when wet
  and shrink when dry. These expansion-and-contraction cycles push and settle
  piers unevenly, displacing blocks and knocking shims out of contact with the
  beam.
• Undersized or shallow footings: Many older bases were
  poured small and shallow. When saturated soil loses bearing strength, those
  footings sink, taking the pier and the floor above with them.
• Wood rot and pest damage: Chronic moisture invites rot and
  insects that weaken the wood beams and shims transferring load from the
  piers to the floor.

Warning Signs Your Savannah Block-and-Base Foundation Needs Repair

Because the damage happens out of sight in the crawl space, homeowners usually
notice it first in the living space above. Watch for these signs, which are
the questions Savannah homeowners most often ask us about:

• Sagging, sloping, or dipping floors — often the clearest
  sign that a beam has dropped off its pier or shims.
• Bouncy or spongy floors that flex when you walk across
  them, pointing to a lost support point or a rotted beam.
• Gaps between the floor and baseboards, or visible
  separation where interior walls meet the floor.
• Doors and windows that stick or no longer latch as frames
  shift out of square.
• Cracks in drywall, especially above doorways and at wall
  corners.
• Visibly leaning, cracked, or crumbling piers when you
  inspect the crawl space, along with fallen shims on the ground.

If you notice any of these, a crawl-space inspection tells us exactly which
piers have failed. Call (912) 642-3890 to
schedule one.

How Solid Foundation Repair Of Savannah Repairs Block-and-Base Foundations

The right fix depends on how far the pier system has degraded. At Solid
Foundation Repair Of Savannah, we match the repair to the actual condition of
each pier rather than replacing everything by default. Common methods include:

• Re-shimming and re-leveling: When the pier is sound but the
  beam has settled, we add durable steel shims and re-level the floor,
  restoring solid contact between pier and beam.
• Rebuilding or replacing failed piers: Cracked blocks,
  crumbled mortar, and leaning stacks are torn down and rebuilt with fresh
  concrete blocks on a stable base.
• Adding new support piers: Where beams span too far or the
  original grid was too sparse, we install additional piers to distribute the
  home’s weight evenly and stop future sagging.
• Replacing wood shims with steel: Compressible wood shims
  are swapped for steel to resist Savannah’s crawl-space moisture and hold
  level far longer.
• Steel support and underpinning: For deeper problems, we add
  steel supports or underpin failing footings down to soil that can carry the
  load reliably.

Protecting Your Repair for the Long Term

A re-leveled foundation lasts only as long as the crawl space stays healthy.
Because coastal Georgia moisture is the root cause of most block-and-base
failures, we pair pier repairs with drainage and moisture control so the fix
holds. Managing water away from footings, improving crawl-space ventilation or
encapsulation, and periodic re-shimming checks every few years all keep piers
and shims in solid contact. As a family-owned contractor serving Savannah and
the Lowcountry since 1989, we back our work and inspect the whole load path —
not just the one pier you noticed. To find out what your home needs, request a
free estimate.