What's the difference between a vertical and horizontal crack?

Vertical cracks are more often caused by normal concrete curing and shrinkage and tend to be less serious. Horizontal cracks, especially with visible bowing, can point to soil pressure pushing on the wall and usually deserve a closer structural look.

Can I just fill a small crack myself?

A surface patch might slow a minor seep temporarily, but it won't address water pressure behind the wall the way a proper injection does, and it can mask a problem that's still getting worse.

Does crack injection stop the wall from cracking again elsewhere?

Injection seals the specific crack it's applied to, but it doesn't change the soil pressure or drainage conditions causing cracks in the first place. If cracking keeps happening, that's a sign to look at grading or exterior drainage.

How long does a typical crack repair take?

An interior injection job is usually finished in a matter of hours. Anything involving exterior excavation takes longer and depends on wall length and depth.

Foundation crack repair in Rock County

Not every foundation crack needs a full exterior dig-and-waterproof job. Many are handled with interior crack injection, using epoxy or polyurethane pumped directly into the crack to seal it from the inside, which is far less invasive and disruptive than excavating the outside of the wall.

The split that matters here is whether the crack is a contained, non-structural seep point or a symptom of a larger problem, like a settling foundation, hydrostatic pressure pushing on the wall, or a section of wall that's bowing. A contractor should inspect the crack's width, direction, and whether it's actively leaking or just staining before recommending injection alone versus pairing it with exterior grading, drain tile, or a membrane system.

Rock County's freeze-thaw winters and clay-heavy soil in parts of the county put extra stress on foundation walls, which is part of why cracks show up and why a quick, honest read on severity matters before paying for either a patch or a bigger dig.

What it costs

Cost depends mainly on whether the fix is a contained interior injection job or requires exterior excavation to address the wall from outside, plus how many cracks need attention and whether there's any sign of structural movement that needs an engineer's opinion first. A single interior injection is a much smaller job than exterior work involving digging along the foundation.

Top 3 by our score

Ranked from our published scoring of public Google reviews for exterior & below-grade waterproofing.

1. Rote's Landscaping And Waterproofing
4.9★ · 73 reviews

89
2. Flood Pros Waterproofing
5.0★ · 33 reviews

82
3. Brady's Waterproofing & Concrete
5.0★ · 55 reviews

81

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FAQ

What's the difference between a vertical and horizontal crack?: Vertical cracks are more often caused by normal concrete curing and shrinkage and tend to be less serious. Horizontal cracks, especially with visible bowing, can point to soil pressure pushing on the wall and usually deserve a closer structural look.
Can I just fill a small crack myself?: A surface patch might slow a minor seep temporarily, but it won't address water pressure behind the wall the way a proper injection does, and it can mask a problem that's still getting worse.
Does crack injection stop the wall from cracking again elsewhere?: Injection seals the specific crack it's applied to, but it doesn't change the soil pressure or drainage conditions causing cracks in the first place. If cracking keeps happening, that's a sign to look at grading or exterior drainage.
How long does a typical crack repair take?: An interior injection job is usually finished in a matter of hours. Anything involving exterior excavation takes longer and depends on wall length and depth.