Floor Crack Repair in Montgomery, AL

Floor cracks are common in concrete slab foundations and basement floors in Montgomery,

Alabama. While many are cosmetic, some indicate deeper foundation problems.

Understanding floor crack repair helps you know when to simply fill a crack and when to call a

professional.

Types of Floor Cracks

Shrinkage cracks occur as concrete cures and are usually hairline (less than 1/8 inch) and

random. Settlement cracks appear when the soil beneath the slab compresses or erodes,

causing the slab to crack along stress lines. Heaving cracks result from the slab being pushed

upward by swelling clay. Control joint cracks follow the intentionally cut lines in the slab; these

are normal. Montgomery Foundation Repair Co evaluates the pattern, width, and location of

floor cracks to determine the cause.

When Floor Cracks Are Cosmetic

Hairline cracks (less than 1/8 inch) with no vertical displacement (one side not higher than the

other) are usually cosmetic. They do not affect the structure and can be filled with concrete

crack filler or epoxy. Control joint cracks are also normal. If you have a few such cracks and no

other foundation symptoms, you can safely ignore them or repair them cosmetically.

Montgomery Foundation Repair Co offers a low‑cost inspection to confirm that your floor

cracks are not a sign of settlement.

When Floor Cracks Indicate Foundation Problems

Cracks wider than 1/4 inch, cracks with vertical displacement, or cracks that run continuously

across the slab often indicate foundation settlement or heaving. Also concerning are multiple

parallel cracks, cracks that extend from the wall into the floor, or cracks that are growing over

time. In these cases, the underlying foundation movement must be addressed (with piers or

drainage improvements) before the floor crack is repaired. Simply filling the crack will not stop

the movement, and the crack will reopen.

Repair Methods for Floor Cracks

For cosmetic cracks, use a concrete patching compound or epoxy filler. For cracks that are

leaking water (in basements), polyurethane injection is more effective because it expands to fill

the crack completely. For structural cracks caused by settlement, we install piers to stabilize

the foundation, then fill the crack. For heaving cracks, we may need to remove and replace the

heaved section of floor. Montgomery Foundation Repair Co can recommend the appropriate

method after inspection.

Frequently Asked Questions