Duluth · Superior · North Shore
Concrete Lifting & Leveling in Duluth, MN — Built for Frost Heave Country.
St. Louis County sits in Minnesota's Zone I: 5-foot frost depth, the deepest in the state. Your driveway, walk and garage apron sit far above that line, so they ride the frost every winter. We lift them back to grade — and we plan the work around the climate that moved them.
- 106
- days a year below freezing
- ~42
- freeze-thaw cycles annually
- 5 ft
- Zone I frost depth
Tell us what's moving
Three fields. We call you back to set up a look at the slab.
Climate authority
Why concrete moves in the Northland
Leveling concrete in Duluth is not the same trade it is in Kansas City. Six measurable facts explain almost every settled slab in the Twin Ports:
5-Foot Frost Depth
Minnesota Rule 1303.1600 puts St. Louis County in Zone I — footings must reach 5 feet to clear frost, the deepest requirement in the state. Your driveway sits inches down, not feet.
106 Days Below Freezing
Duluth's daily high stays below 32°F an average of 106 days a year — second-highest of any city in the contiguous United States — with roughly 42 freeze-thaw cycles annually.
90 Inches of Snow
Average snowfall is about 90 inches, with snow on the ground an average of 137 days. That snowpack is the water supply that saturates the soil under your slabs every spring.
Clay Till Underfoot
The USDA soil series literally named "Duluth" is loamy soil over firm clay till at 20–35% clay with poor drainage. Meltwater perches on that clay directly under slabs, then refreezes.
80+ Winters of Heave
More than 40% of Duluth's housing was built before 1940. Original walks, garage aprons and basement floors have been cycling through heave and settlement for eight decades.
Late-March Thaw Signal
MnDOT's spring load restrictions in the North frost zone — the state's official "the ground is thawing" marker — typically begin in late March. That's when settled slabs show worst.
Put them together and you get the Northland pattern: fall rain saturates loamy soil sitting on firm clay till, winter freezes that water into lenses that push slabs up, and spring thaw drops everything back — except the soil never returns to the same volume. The void grows a little each year until the slab finally drops. Read the full frost heave guide.
What we lift
Concrete leveling services
Driveway Lifting
Sunken driveway slabs and settled garage aprons lifted back to grade.
View details →Sidewalk & Step Leveling
Heaved walks and dropped front steps — trip hazards squared up.
View details →Garage & Basement Floors
Interior slabs poured before modern base prep, raised and re-supported.
View details →Patio & Walkway Leveling
Pitch corrected so meltwater sheds away from the foundation.
View details →Polyurethane Foam Lifting
5/8" ports, two-pound expanding foam, back in service in under an hour.
View details →Mudjacking / Slabjacking
Sand-and-cement slurry lifting — the lower cost per square foot option.
View details →How it works
Four steps, no mystery
Step 01
Inspect and measure
We check the actual drop with a level, look at where water is entering, and decide whether the slab is settled, heaved, or both. Cracked and crumbling slabs get told the truth — some concrete is past lifting.
Step 02
Drill small ports
Polyurethane foam goes in through 5/8-inch ports, roughly dime to nickel size. Mudjacking uses about 1-inch ports because slurry is a heavier material.
Step 03
Lift in controlled stages
Material is injected in stages while we watch the slab move, filling the void first, then raising the panel back to grade so the seams line up with the concrete next to it.
Step 04
Patch and seal joints
Ports are patched with grout and joints are caulked so surface water stops draining straight back under the slab — which is what feeds the next heave cycle.
Service area
Twin Ports and North Shore
We work Duluth proper — Central Hillside, East Hillside, Lincoln Park, Lakeside, Woodland and Congdon Park — plus five neighboring communities. St. Louis, Carlton and Lake Counties are all Zone I; Douglas County across the bridge brings its own red lacustrine clay.
Reviews
We're just getting started here
We're a new concrete leveling service in the Twin Ports, and we're collecting reviews from our first Duluth-area projects. We'd rather show you nothing than show you something invented — no stock testimonials, no borrowed star ratings, no fake job counts. Check back soon, or see our reviews page.
FAQ
Questions Duluth homeowners ask
+Can you lift concrete during a Duluth winter?
Polyurethane foam cures in cool, damp conditions and sets in under an hour, so foam work is possible into the shoulder seasons whenever the slab surface is accessible and not buried in snowpack. Mudjacking slurry needs above-freezing conditions to cure properly, so we schedule slurry work in the open season. Frozen ground also masks the true resting height of a slab, which is one more reason we prefer to lift after thaw.
+Why does my driveway sink again every spring?
Duluth averages roughly 42 freeze-thaw cycles a year and about 90 inches of snow, with snow on the ground an average of 137 days. When that snowpack melts, water perches on the firm clay till under the slab instead of draining. Wet soil freezes, lifts the slab, then loses volume on thaw. Each cycle leaves a slightly bigger void underneath, so the drop shows up worst in late March and April.
+How deep does frost go here?
Minnesota Rule 1303.1600 places St. Louis County in Zone I, which requires footings 5 feet deep — the deepest frost-depth requirement in the state. Driveways, sidewalks, patios and garage aprons sit nowhere near that depth, so they ride the frost every single winter while the house next to them stays put.
+How big are the holes you drill?
Polyurethane foam injection uses 5/8-inch ports — roughly dime to nickel size. Mudjacking needs larger ports, about 1 inch, because the sand-and-cement slurry is a much heavier material. Either way, ports are patched with grout when the lift is finished, and joints are sealed so surface water stops running back under the slab.
+Is leveling actually cheaper than replacing the slab?
In most cases, yes. Typical ranges run about $3–8 per square foot for mudjacking and $5–25 per square foot for polyurethane foam, while full removal and replacement runs roughly $6–15 per square foot before any landscaping repair. Leveling generally lands 50–70% below replacement cost, and the slab is usable the same day with foam.
+Which towns do you cover?
Duluth and Hermantown, Proctor, Cloquet, Two Harbors, and Superior, Wisconsin across the harbor. Carlton and Lake Counties are also Zone I with the same 5-foot frost-depth requirement, so the soil behavior we plan around is consistent across the whole Twin Ports and North Shore area.
Get a straight answer on your slab.
Tell us what's sinking. We'll call you back and set up a look.
Call (218) 423-5449Duluth · Superior · Hermantown · Proctor · Cloquet · Two Harbors