Types of Foundation Cracks in Montgomery Homes
| Crack Type | What It Means |
|---|---|
| Hairline shrinkage | Common in poured concrete walls, typically non-structural, though it can allow water seepage |
| Diagonal (45-degree) | Runs from corners of openings; indicates differential settlement - the foundation moving unevenly |
| Horizontal | Most serious - indicates lateral soil pressure is overwhelming the wall's structural capacity |
| Vertical, wider than 1/4 inch | Usually requires repair |
We measure, photograph, and classify every crack as part of the inspection.
Crack Repair Methods We Use
Crack repair methods we use:
- Epoxy injection - for structural cracks where the two faces must be bonded together; a two-part epoxy is injected under low pressure, filling the crack from the bottom up and restoring structural continuity
- Polyurethane foam injection - for cracks that are actively leaking; the foam expands to fill the crack and creates a waterproof seal, but does not bond the wall structurally
- Carbon fiber straps or wall anchors - added when a crack indicates ongoing wall movement that must be stopped
When Is a Crack an Emergency?
Horizontal cracks, or any crack accompanied by inward deflection of the wall, are structural emergencies requiring prompt professional evaluation. Stair-step cracks in block walls that are widening or showing displacement are also serious. Cracks that are growing - where new crack extensions appear over time - indicate active movement. If you are unsure, call us for an inspection; we will tell you honestly whether the crack requires immediate action or monitoring.
Reading a Wall Crack in Montgomery Before Paying to Fill It
Filling a crack is cheap and sometimes exactly wrong, so ask for the triage first. Width, direction, and offset are the signals: hairline vertical cracks in concrete are often shrinkage from curing, while a crack that widens toward one end, steps diagonally through brick mortar joints, or shows one side displaced out of plane indicates movement, and sealing it hides the evidence without stopping the cause. Ask what was measured and whether it was photographed with a scale and dated. Ask whether the recommendation is monitoring for a season with a crack gauge, injection, or structural stitching, and what each assumes about the cause. If injection is proposed, ask which material and whether it restores strength or only blocks water, because those are different products sold at similar prices. Ask as well whether the same crack has been repaired before, since a second failure at the same location argues for movement rather than for a better sealant.
- Require crack width, direction, and offset documented with a scale
- Ask whether monitoring for a season is the honest first step
- Ask what the recommendation assumes about the cause
- For injection, ask whether it restores strength or only seals water
- Red flag: sealing offered before anything is measured
Frequently Asked Questions
Do you offer free estimates in Montgomery, AL?
Yes. Montgomery Foundation Repair Co provides free on-site inspections and written estimates throughout Montgomery County - no obligation. Call (334) 835-5928 to schedule.
Which wall cracks are structural emergencies?
Horizontal cracks in block or concrete walls are the most serious - they indicate soil pressure is overwhelming the wall. Stair-step cracks in brick veneer signal differential settlement. Cracks wider than 1/4 inch or cracks that are actively growing require immediate attention. Call (334) 835-5928 if you see these patterns.
What is the difference between epoxy and polyurethane crack injection?
Epoxy injection restores the structural strength of concrete - best for load-bearing cracks. Polyurethane foam expands to fill voids and create a waterproof seal - best for wet cracks and basement wall leaks. Montgomery Foundation Repair Co selects the appropriate material based on crack type, location, and moisture conditions.
Will repaired cracks reopen?
If the underlying cause (soil movement, drainage, settlement) is not addressed, cracks can reopen. Montgomery Foundation Repair Co always checks for ongoing movement before recommending crack injection. When piers or drainage corrections are needed first, we complete those repairs before sealing cracks to ensure lasting results.