Concrete Repair · Problem Signs · Since 1994

Lift Your Sinking Garage Floor — Often In One Day

Epp Foundation Repair has stabilized sinking garage slabs across Nebraska, Iowa, Kansas, and Missouri since 1994 using polyurethane foam injection that cures in 15 minutes.

Let's take the first step toward a healthy home.

A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate. no cost, no pressure.

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What this symptom means

Sinking Garage Floors: diagnosed and explained.

Epp Foundation Repair inspects roughly 380 sinking garage slabs each year across the Lincoln, Omaha, Des Moines, and St. Joseph markets. A garage floor settles when the engineered fill placed beneath it during construction loses volume, and on 1960s through 1980s Nebraska and Iowa builds that fill was often sand, native loess, or pit-run gravel placed in lifts thicker than 12 inches without proper compaction testing. Dave Epp documents drops of 1 to 4 inches at the apron joint, with corner settlement concentrated where the slab meets the stem wall. The slab itself is usually intact, which is why foam lifting is viable on roughly 9 out of 10 garage floors Epp diagnoses.

Sinking Garage Floors diagnosed by Epp Foundation Repair

Catch It Early

Why Acting On A Sinking Garage Floor Now Saves You Thousands

Early warning signs of sinking garage floors on a Midwest home

Visible Gap Between Slab And Stem Wall

When you can see daylight or insert a tape measure between the garage floor and the foundation wall, the slab has dropped enough to compromise the door threshold seal. Mice, snakes, and water enter through gaps over 3/8 inch.

Garage Door Won't Close Flush

A garage door that gaps 1/2 inch or more at one corner of the threshold indicates differential settlement of 1 inch or more across the slab. The opener will continue cycling normally for months while the seal fails, then the bottom panel rusts at the gap.

Water Pooling Inside The Garage

A flat or back-pitched garage floor pools snowmelt against the stem wall and the drywall above. Dave Epp has documented stem wall efflorescence, sole plate rot, and mold colonization on roughly 12% of sinking garage floor inspections where the homeowner waited more than 18 months to address visible pooling.

Cracks Radiating From The Apron Corner

Stair-step cracks that radiate from the front corners of the slab toward the rear wall mean the slab is bending under its own weight as the corner support fails. Once a crack exceeds 1/4 inch in width, foam lifting alone cannot restore structural continuity and the homeowner needs sectional replacement.

Most Common Causes

What causes sinking garage floors in Midwest homes.

Inadequate Original Fill Compaction

Builders constructing homes in eastern Nebraska and western Iowa between 1960 and 1985 routinely placed sub-slab fill in 18 to 24 inch lifts when modern practice calls for 8 inch lifts compacted to 95% Standard Proctor density. That uncompacted fill consolidates 1 to 4 inches over 30 to 50 years as moisture cycles through the soil column, dropping the garage slab away from the stem wall.

Plumbing Leak Voids

Washing machine drain lines, water softener discharge, and freeze-burst supply lines beneath the garage slab erode fill and create voids that the slab eventually falls into. Epp Foundation Repair locates the leak source first, requires the homeowner to repair the plumbing through a licensed plumber, and then injects polyurethane foam to fill the void and re-level the slab.

Loess And Expansive Clay Soil Behavior

Loess soils across the Platte, Missouri, and Nishnabotna river valleys collapse on first saturation, a behavior called hydroconsolidation that drops fill 2 to 6 percent of its dry thickness. Expansive clays in central and southeastern Nebraska with plasticity indexes above 30 swing 12 to 15 percent in volume between summer drought and spring saturation, and that seasonal movement fatigues the slab-soil bond until the slab settles.

Vehicle Weight Cycling On A Thin Slab

Most residential garage slabs in this region were poured 3.5 to 4 inches thick over uncompacted subgrade. A 5,500 pound SUV cycling daily across the same wheel path for 20 years pumps fines out of the subgrade through any micro-crack, hollowing the support beneath the slab until visible settlement appears at the wheel track.

Apron-To-Driveway Joint Failure

The expansion joint between the garage apron and the driveway is the most common settlement initiation point. Water enters the joint, erodes the fill beneath the apron, and the corner of the garage slab drops first. Dave Epp sees this on roughly 60% of garage floor calls in older Lincoln and Omaha neighborhoods.

Underlying cause of sinking garage floors in Midwest homes

Permanent Solutions

How concrete repair specialists actually fix sinking garage floors.

Solving sinking garage floors means addressing the underlying soil, pressure, or settlement cause. Not just patching the visible damage. Below are the engineered solutions we install most often for this symptom in Nebraska, Iowa, Kansas, and Missouri homes.

Concrete Repair solutions

Engineered concrete repair solutions for this problem.

Each method is matched to a specific failure mode and soil profile. Browse the toolkit we draw from when diagnosing your home.

Polyurethane Foam Injection

Epp Foundation Repair has injected closed-cell structural foam beneath driveways, sidewalks, garage floors, and pool decks across Nebraska, Iowa, Kansas, and Missouri since 1994. The slab lifts. The void fills. The work finishes in a single day.

Polyjacking

Epp Foundation Repair has installed polyurethane foam slab lift. Whether the contractor calls it polyjacking, foam jacking, or poly lift. Across Nebraska, Iowa, Kansas, and Missouri since 1994. Same closed-cell foam. Same 5-year warranty.

Slab Piers

Epp Foundation Repair has installed small-diameter helical slab piers under ranch homes, slab additions, and light commercial slabs across Nebraska, Iowa, Kansas, and Missouri since 1994. Engineered for slab-on-grade loads, warrantied for life on the pier.

Regional Context

Why concrete fails differently in Nebraska, Iowa, Kansas, and Missouri

Loess soils consolidate under slabs after the first deep water exposure. Expansive clay heaves and contracts seasonally. Salt damage from 60+ freeze-thaw cycles per winter accelerates surface failure. Generic concrete repair ignores the soil under the slab, which is why settled concrete returns within a season or two. Regional repair starts with the cause underneath, not the crack on top.

36 to 42"

Frost penetration depth

Eastern Nebraska average

60 to 80

Freeze-thaw cycles / year

Lincoln to Omaha corridor

35 to 40"

Annual precipitation

NE / IA service region

30+

Years of regional inspections

30,000+ homes assessed

Loess soils and the crack patterns they produce

Most of eastern Nebraska and western Iowa sits on wind-deposited loess. a fine, silty soil 10 to 200+ feet deep. Loess holds its structure when dry but loses cohesion rapidly when saturated. After a wet spring, saturated loess expands against foundation walls. After a dry Nebraska summer, it contracts. pulling away from footings, creating voids beneath slabs, and producing the vertical and diagonal settlement cracks we see most frequently on the Lincoln, Omaha, Council Bluffs corridor.

The Marshall and Sharpsburg loess series. dominant across the eastern Nebraska service area. are particularly prone to this cyclical volume change. Homes built in the 1960s, 1980s on uncompacted loess backfill show the highest incidence of progressive settlement cracking in our inspection data.

Frost depth, freeze-thaw cycles, and horizontal cracking

Eastern Nebraska's 36, 42" frost penetration depth means the soil below grade freezes and thaws 60, 80 times per year. Each cycle applies lateral pressure to basement walls. A wall that holds through ten cycles can fail in the eleventh if drainage has worsened, backfill has settled, or the wall was already at capacity. Horizontal cracks near the soil grade line are almost always a freeze-thaw story in this region.

In eastern Kansas, expansive clay pockets near the surface introduce a different failure mode . consistent volume change regardless of frost depth. Horizontal cracking in Kansas foundations typically traces to clay expansion; the same pattern in Nebraska more often indicates frost-driven hydrostatic pressure.

"If your garage floor settled because the original 1970s builder skipped compaction testing, the floor isn't broken. The fill is. Lifting the slab with foam takes a morning and lasts decades. Pouring a new slab over the same fill costs four times more and settles again in 20 years."

Dave Epp

President, Epp Foundation Repair

Why Choose Epp

Care and expertise from a team that's been doing this since 1994.

Epp Foundation Repair is locally owned and operated, with crews dedicated exclusively to foundation, basement, and concrete work across the Midwest.

Specialized expertise.

Foundation repair, waterproofing, and concrete leveling are our entire focus. not a sideline.

Locally owned since 1994.

Three decades of experience with Midwest soils, basements, and weather conditions.

BBB Integrity Award winner.

Recognized in 2011 and 2016 for ethical business practices and customer transparency.

Warrantied solutions.

Most product solutions carry 10 to 25-year warranties backed by the original installer.

EPP · SINCE 1994

Why hire Epp Foundation Repair.

MEET THE TEAM · 2 MIN

Frequently Asked Questions

Answers to common questions about Sinking Garage Floors.

Don't see your question here? Our team is happy to help. Reach out anytime.

A sinking garage floor is moderately serious. The slab itself is structurally independent from the foundation walls in roughly 95% of homes built since 1960, so settlement does not threaten the house structure. However, sinking creates door seal gaps that admit pests and water, snowmelt pooling that rots sole plates and drywall above, and trip hazards at the door threshold. Epp Foundation Repair sees roughly 15% of ignored sinking floors progress to stem wall damage requiring foundation-scope repair within 5 years. Acting at 1 to 2 inches of drop is the cost-efficient window.

Epp Foundation Repair typically prices a sinking garage floor lift between $1,500 and $5,000 for a standard 2-car residential garage in Nebraska, Iowa, Kansas, or Missouri. Foam material runs $5 to $25 per square foot of injection area depending on void depth, with the lower end applying to settlement under 1 inch and the upper end to deep voids 4 to 6 inches below the slab. The written estimate after on-site inspection reflects your scope, slab dimensions, and access conditions.

Polyurethane foam injection is non-destructive to intact concrete. Epp Foundation Repair drills 5/8 inch ports, smaller than a US quarter, and patches them with color-matched hydraulic cement that is nearly invisible once cured. The foam itself is inert, does not leach chemicals into the soil, and adds no point-load stress to the slab. Slabs with existing cracks wider than 1/4 inch may show movement at the crack during the lift, which is why Dave Epp screens for this in step 2 of the process.

Epp Foundation Repair does not pour new concrete and does not perform full slab replacement. When inspection shows cracks-through exceeding 50% of the slab area, debonded sections, or rebar corrosion, Epp writes a referral to a licensed flatwork contractor for replacement and provides the homeowner the engineering documentation. Roughly 1 in 10 garage floor inspections falls into this category. The honest scope keeps Epp focused on what we do best, which is lifting and stabilizing salvageable concrete.

Stem wall repair is foundation-scope work, not concrete leveling scope. Epp Foundation Repair does perform foundation repair as a separate service through our foundation crews using helical piers, push piers, and wall anchor systems, but the diagnosis and pricing are separate from a garage floor lift. If the on-site inspection identifies stem wall settlement contributing to the slab drop, the technician documents both issues and provides separate written estimates.

Closed-cell polyurethane foam is hydrophobic, does not absorb moisture, and is not subject to freeze-thaw degradation. Epp Foundation Repair has documented foam lifts performed in 2012 still holding elevation in 2026 across 1,400+ Lincoln and Omaha jobs we track. The 5-year written warranty covers settlement, but the foam itself has a service life measured in decades. The variable is whether the original cause was addressed. An unrepaired plumbing leak will re-erode any fill the foam supports.

Pricing ranges above are general estimates only and are not project quotes. A precise figure is provided on each written estimate after on-site inspection.

Other concrete repair warning signs to watch for.

If you see one, it's worth checking for the others. Most foundation problems show up as more than one symptom.

Concrete Cracks Diagnosed and Repaired

Epp Foundation Repair diagnoses exterior concrete cracks on driveways, sidewalks, patios, garage floors, and pool decks across a four-state territory covering more than 130,000 square miles. Dave Epp founded the company in 1994, and after 30-plus years reading slabs, the field rule holds: roughly 70 percent of widening exterior cracks trace back to subgrade movement, not the concrete itself. A hairline crack 1/16 inch wide that has not moved in two years is almost always shrinkage from the original cure. A 1/4-inch crack with one side dropped lower than the other is a settlement signal, and the slab is telling you the dirt under it is gone or going.

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Cracking Expansion Joints

Expansion joints are the soft filler strips set between concrete sections so the slabs can move without crushing into each other. Concrete expands in summer heat and contracts in winter cold, and across eastern Nebraska and western Iowa that swing happens through 50 to 70 freeze-thaw cycles every year. Each cycle works the joint a little harder. The filler dries out, shrinks, and eventually cracks or falls out. Once the joint opens, water runs straight down into the soil under the slab. That soil is often expansive clay or loess, which swells when wet and shrinks when dry, so the very water the joint was meant to keep out starts moving the slab from below. A cracked joint by itself is rarely a structural emergency. The reason to act is what follows: open joints feed water under the concrete, and water under concrete in this region is the leading cause of settlement, lifting, and slab separation. Sealing or replacing a joint early is a low-cost step. Waiting until the slab has settled or heaved turns it into a leveling or replacement job.

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Gaps Between Concrete Slabs and Walls

Gaps form between concrete slabs and walls when the soil under the slab settles and the slab drops with it, while the wall or the next slab stays in place. Across Nebraska, Iowa, Kansas, and Missouri the soil doing the settling is usually expansive clay or loess, which compacts and shrinks as it dries and washes out where drainage is poor. A patio pulling away from the house, a garage floor separating from the foundation wall, or concrete steps leaning back from the porch are all the same story: the slab has lost support underneath. The reason to take an early gap seriously is water. An open gap is a funnel. Every rain and snowmelt pours water straight into the soil beneath the slab and, where the gap is against the house, down along the foundation wall. That water accelerates the very settlement that opened the gap, and near the foundation it can find its way toward the basement or crawl space. The 50 to 70 freeze-thaw cycles this region sees each year widen the gap as trapped water freezes and expands. Sealing a thin gap is simple. A wide gap with a settled slab needs the slab lifted and the void filled before sealing makes sense.

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Pitting, Flaking, and Staining on Exterior Concrete

Epp Foundation Repair inspects surface deterioration on driveways, sidewalks, patios, garage aprons, and pool decks throughout a four-state territory where winter de-icing salt and 50 to 110 annual freeze-thaw cycles are the dominant accelerator of concrete surface failure. Dave Epp founded the company in 1994. After three decades of inspections the pattern holds: 80 percent of pitting and flaking calls we look at are cosmetic. The structural slab beneath is sound, but the 20 percent that reach the reinforcement steel below need a different conversation. We tell you which category yours falls into on the first visit, and we tell you when the right answer is a coating contractor, not us.

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Pool Deck Settling and Tilting Around the Pool

Epp Foundation Repair diagnoses and lifts settled pool decks across a four-state territory where backfill compaction at pool installation rarely meets the 95 percent Proctor standard structural fill requires. Dave Epp founded the company in 1994. In three decades of pool-deck inspections, the pattern is consistent: roughly 85 percent of settling deck calls trace back to poorly compacted backfill around the pool walls. Fill that settles 1 to 4 inches in the first 5 years. The remaining 15 percent involve pool shell movement or expansive clay heave, and those require a different contractor or a different approach. We tell you which one yours is before any work is scoped.

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Sinking Driveways Diagnosed and Lifted Back to Grade

Epp Foundation Repair diagnoses and lifts sinking driveways across a four-state territory dominated by two soil behaviors that account for the majority of driveway settlement: hydroconsolidated loess fill in eastern Nebraska and western Iowa, and expansive clay in central Kansas and northern Missouri. Dave Epp founded the company in 1994. In three decades of driveway inspections, the field rule holds: 90 percent of sinking-driveway calls trace back to water reaching the subgrade through a fixable source. A downspout, a broken sprinkler, a low spot in the grade. We walk the water before we scope the lift, and we will not warranty a lift while the water source is still feeding the void.

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Service Areas

Serving Nebraska, Iowa, Kansas & Missouri.

Local crews based in six regional offices, dispatched daily across four states. If your town isn't listed, call us. we likely serve your area.

Top cities we serve

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Our Process

Take the first step toward a healthy home.

A straightforward path from initial inspection to completed repairs.

Step 01

Schedule your inspection.

A local specialist visits your home, evaluates the foundation, and answers your questions on site. No cost, no obligation.

Step 02

Receive an estimate based on your needs.

We provide a clear, written estimate with a scope of work tailored to your home's specific issues. Typically within one business day.

Step 03

Get your repairs.

Our certified crews complete the work on schedule and back it with product warranties of up to 25 years.

Schedule Your Inspection

Customer Reviews

Over 1,750 homeowners have shared their experience.

A 4.9-star average across Google, with verified reviews from homeowners throughout Nebraska, Iowa, Kansas, and Missouri.

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Free Estimate

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Schedule your inspection in seconds with our Driive booking tool, or share a few details and a local specialist will follow up within one business day.

What to expect

A local foundation specialist on site
A complete walk-through of the findings
A written estimate within one business day
No cost, no obligation, no high-pressure sales

Prefer to call

402-423-9192

Nebraska · Iowa · Kansas · MissouriSince 1994

Let's take the first step toward a healthy home.

A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate. no cost, no pressure.

Book instantly with Driive

BBB Accredited

Fully Insured

"By Your Side" Guarantee

From the Blog

Expert guidance on protecting your home.

Practical articles from the Epp team on foundation health, waterproofing, and home preservation.

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Why foundation problems are common in Des Moines homes.

Iowa's expansive clay soils and freeze-thaw cycles are particularly hard on residential foundations. A practical guide to what's happening below grade and why local…

Dave Epp·Feb 18, 2026