Foundation crack repair in Montgomery runs $400–$1,500 for most injections and reinforcement. The critical step is free: measuring whether the crack is active. On Black Belt clay, a crack that widens between spring and August is a movement problem, not a sealing problem.
Here's how Montgomery cracks get triaged before anyone quotes material.
Reading a crack on expansive clay
This market writes cracks in two hands. Brick and block homes crack along mortar joints in the classic stair-step pattern, following the footing that dropped beneath them — the width at the top versus the bottom of the run tells you which end moved. Slab homes crack in the concrete and telegraph it through flooring: a line through tile, a ridge under vinyl, a diagonal from a door corner.
Either way the diagnostic is the same and it costs nothing: mark the crack ends, date it, and look again after a full wet-dry cycle. Black Belt clay guarantees that cycle will test the crack honestly within a year. Cracks that hold still get sealed. Cracks that grow get measured properly and priced as the structural question they are.
Material follows the diagnosis
- Polyurethane injection — flexible, water-stopping, and the usual choice where seasonal movement continues
- Structural epoxy — rigid load transfer, specified when an engineer calls for it and the movement cause has been corrected
- Carbon fiber staples — used across cracks with a widening history to resist further separation
- Mortar repointing — restores brick appearance and sheds water once the structure below is stable
Why we quote the cause beside the crack
Sealing is inexpensive. Sealing the same crack three times is not. Every crack scope we write names what we believe is driving it — drainage, settlement, or ordinary shrinkage — and prices that separately, so you can see whether you're buying a repair or a temporary patch. On this soil, that distinction is the whole conversation.
Crack questions, straight answers
Which cracks actually matter?
Width, direction, and trajectory. Hairline vertical cracks in slab or block are usually shrinkage and need sealing at most. Stair-step cracks through brick mortar that exceed a quarter inch, or any crack that measurably widens between spring and fall, indicate active movement — those get structural attention, not caulk.
Can I just seal it myself?
You can seal a hairline crack against water, and sometimes that's genuinely all it needs. What DIY sealing can't do is tell you whether the crack is still moving. A dated pencil mark across the crack, checked after one full wet-dry cycle, answers that for free — and we'll tell you honestly when that's the right next step instead of a repair.
What's the difference between epoxy and polyurethane?
Epoxy is rigid and structural — it welds a crack shut and is specified where an engineer wants load transfer and the movement cause has been corrected. Polyurethane stays flexible, which suits cracks that still experience seasonal movement. On soil this active, flexible material is the more common right answer.
Do you repair cracks in brick veneer?
Yes, though brick cracks are usually a symptom rather than the problem. Repointing mortar joints restores appearance and keeps water out, but if the underlying footing is still settling, the crack returns along the same line. Our scopes name the cause beside the masonry line so you can decide the order of operations.
Get a free Montgomery foundation evaluation
Tell us what the house is doing — stair-step cracks, doors that stick every August, sloping floors, separating trim — and we’ll schedule an evaluation with photos and measurements. We reply the same business day.
