Slab Foundation Repair in Montgomery, AL

Slab‑on‑grade foundations are common throughout Montgomery, Alabama because they are

less expensive than basements and perform adequately on well‑compacted soil. But when the

red clay beneath a slab expands or contracts, the concrete can crack, settle, and even

separate from the rest of the house. Slab foundation repair in Montgomery requires specialized

techniques that address both the concrete surface and the supporting soil below.

Why Slab Foundations Fail in Montgomery’s Soil

A concrete slab is only as strong as the ground beneath it. During wet periods, Montgomery’s

clay swells, pushing up on the slab’s center or edges. During drought, the clay shrinks, creating

voids that leave the slab unsupported. Over time, the slab cracks, and sections sink by 1 to 4

inches. You might notice cracked floor tiles, gaps between baseboards and flooring, or a

sloping living room. Unlike pier‑and‑beam homes, slab foundations offer no crawl space for

easy access, which makes diagnosis and repair more challenging. Montgomery Foundation

Repair Co uses non‑invasive soil sounding and floor‑level surveys to map settlement patterns.

Slab Pier Installation for Deep Support

The most permanent slab foundation repair involves installing helical piers or push piers

through the slab itself. Montgomery Foundation Repair Co cuts small access holes (about 12

inches square) inside your home, typically along interior load‑bearing walls or at points of

maximum settlement. We excavate a small pit through the slab, attach a bracket to the top of

the footing (the thickened edge of the slab), and drive or torque a pier to stable soil. Once all

piers are in place, we lift the slab back to level, grout the access holes, and patch the floor

covering. This method does not disturb your landscaping and works even in finished homes

with hardwood or tile floors.

Polyurethane Foam Lifting for Minor Settlement

When settlement is less than 2 inches and the slab remains structurally sound, polyurethane

foam injection offers a minimally invasive alternative. Montgomery Foundation Repair Co drills

small 5/8‑inch holes through the slab and injects two‑part polyurethane foam. The foam

expands rapidly, filling voids and lifting the slab from below. Unlike mudjacking, the foam is

lightweight (only 2 to 4 pounds per cubic foot) and does not add significant weight to the

already stressed clay. This method works best for isolated sunken areas, such as a garage slab

or a settled patio. However, foam does not provide deep foundation support and should not be

used for ongoing settlement caused by active clay movement.

Preventing Future Slab Problems After Repair

Once your slab is stabilized, proper drainage becomes critical. Montgomery Foundation Repair

Co will check your gutters, downspouts, and yard grading to ensure water flows away from the

foundation. We recommend installing soaker hoses around the perimeter during dry summer

months to keep the clay from shrinking excessively. A consistent moisture routine—neither too

wet nor too dry—helps maintain the condition of your repaired slab. We also advise against

planting large trees or shrubs within 15 feet of the foundation, as roots extract moisture from

the clay and accelerate settlement.

Frequently Asked Questions