Epoxy & Polyurethane Injection Specialists

Foundation Crack Repair in Fort Collins, CO

We seal and repair foundation cracks in Fort Collins homes with epoxy and polyurethane injection: fast, clean, and built to last.

Fixing a Foundation Crack the Right Way

If you've found a crack in your foundation wall, the first question is always the same: is it serious? Our inspection answers that directly, and if a repair is needed, we get to it fast. Most foundation crack injections are completed same-day, with no excavation and no torn-up landscaping. Whether the crack is a hairline shrinkage line or a wider structural split, we diagnose it honestly and repair it with the method built for that specific problem.

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Proud to Serve Northern Colorado

Photo of epoxy injection sealing a foundation crack

What's Included

Full Crack Inspection & Diagnosis

Every job starts with an in-person look at the crack, the surrounding wall, and any related signs inside the home (moisture, staining, or nearby drywall movement) before we recommend anything.

Epoxy Injection (Structural)

For cracks that need to be structurally bonded back together, we use a low-viscosity epoxy injected under pressure along the full depth of the crack.

Polyurethane Injection (Waterproofing)

For cracks where water intrusion is the main concern, we use a flexible polyurethane injection that creates a permanent, flexible water seal, even in cracks that move slightly with the seasons.

Exterior Waterproofing (Add-On)

For cracks tied to a larger drainage or grading issue, we can pair interior injection with exterior waterproofing recommendations. This is especially relevant for homes on sloped lots or with grading that directs water toward the foundation, a common contributor to recurring cracks in older Fort Collins-area neighborhoods.

Structural vs. Cosmetic: How We Tell the Difference

Not every crack needs the same fix. We identify which category yours falls into during the initial inspection, before recommending any repair.

Cosmetic Cracks

  • Hairline-thin and usually vertical
  • Show up in the first year or two as concrete cures and settles
  • Rarely need more than a sealant to keep moisture out

Structural Cracks

  • Wider, and often diagonal or stair-stepped along mortar joints
  • Tend to keep growing over time rather than stay put
  • Can appear alongside sticking doors, windows, or uneven floors

Water-Related Cracks

  • Don't have to be wide to let water through
  • Weeping or white mineral deposits (efflorescence) are a warning sign
  • Worth sealing with polyurethane before it leads to a damp basement

What It Costs

Every foundation is different, and so is every crack. Length, depth, width, and cause all affect the right repair method and the price. Rather than guess at a number that doesn't apply to your situation, we give every homeowner a free, in-person quote before any work starts.

Repair TypeWhat's InvolvedPrice
Hairline Crack SealingSurface sealant for minor, non-structural cracksFree On-Site Quote
Epoxy Injection (Structural)Full-depth structural bonding for load-bearing cracksFree On-Site Quote
Polyurethane Injection (Waterproofing)Flexible water seal for active or water-related cracksFree On-Site Quote
Exterior Waterproofing Add-OnGrading/drainage work paired with interior injectionFree On-Site Quote

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Before-and-after photo of a foundation crack repair, raw crack on the left and sealed repair on the right
Before (left): an untreated diagonal crack with mineral staining. After (right): the same wall, fully injected and sealed.

Why Choose Fort Collins Crack Repair

We Diagnose Before We Sell

If a crack doesn't need injection, we'll say so. Every recommendation is based on what we actually find during the inspection.

Built for Colorado Soil

Our repair methods are chosen with Front Range clay soil and freeze-thaw cycles in mind, the same conditions that caused the crack in the first place.

Warrantied Work

Every injection repair is backed by our workmanship warranty.

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A cracked foundation shouldn't be a mystery.

Photo of Northern Colorado neighborhoods served

Our Repair Process

1

Inspect

An in-person evaluation of the crack and any related symptoms. No repair is recommended sight unseen.

2

Diagnose

A plain-language explanation of what's causing the crack and which injection method fits.

3

Inject & Seal

Full-depth epoxy or polyurethane injection, completed in most cases in a single visit.

4

Warranty

Every completed repair is covered by our workmanship warranty.

Common Questions

Can a foundation crack be fixed?

Yes. Most foundation cracks, whether hairline shrinkage cracks or wider structural cracks, can be permanently sealed and stabilized using epoxy or polyurethane injection, without full excavation. The right method depends on whether the crack is structural, water-related, or both, which is exactly what our free inspection is for.

How big of a foundation crack is serious?

Width is one factor, but not the only one. As a general rule, cracks wider than about 1/4 inch, cracks that are actively growing, cracks with a diagonal or stair-step pattern, or cracks accompanied by doors and windows that no longer close properly all warrant a professional inspection.

How much does it cost to repair a cracked foundation?

Cost depends on the length, depth, and cause of the crack, along with which injection method it needs. Because every foundation and every crack is different, we give every homeowner a free, in-person quote rather than a generic number that may not apply to their situation.

Can Flex Seal fix a foundation crack?

Surface sealants like Flex Seal can temporarily slow a minor leak, but they don't bond a structural crack back together or create a permanent seal against water pressure from outside the wall. For a lasting fix, an injection repair performed from within the crack itself is the more reliable option.

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Our Services

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