Every commercial property has a spot everybody steps around. The panel by the front door that dropped half an inch. The dock apron that holds a puddle all spring and turns to ice by December. The shop floor joint where every pallet jack wheel slams down.
The holdup is usually the same: nobody wants to close an entrance for a week, rope off half the lot, or tear up a floor that's otherwise fine. That's the problem foam lifting solves.
Here's where it fits on a commercial property, where it doesn't, and how to get a quote without anyone tying up your afternoon.
Walk Your Property: Where Commercial Concrete Sinks
Settlement on a commercial site tends to show up in the same handful of places.
| Problem | Business risk | Usual fix |
|---|---|---|
| Entrance walk panel sunk below its neighbor | Trip-and-fall claims. A lip that can fail ADA limits on your accessible route. | Lift the low panel flush, then caulk the joints |
| Entrance slab tipped toward the building | Water pools at the threshold and freezes, and gets under the slab at the wall | Lift to restore pitch away from the door, then seal the gap at the wall |
| Dock apron settled near the building | Ponding and ice where drivers and dock staff walk. Trailers can sit lower than the dock, so the leveler works at a steeper angle. | Lift the apron, then seal its joints and the gap at the dock wall |
| Dumpster pad sunk or rocking | Edges break off under truck wheels. Water ponds around the enclosure. | Lift if the pad is in one piece. Replace it if it's shattered. |
| Drive-thru lane dipped at the window | Ice right where customers stop and lean out of the car | Lift the settled panels, then caulk the joints |
| Shop or warehouse floor joint offset | Forklift and pallet jack wheels hammer the edge. Loads shift. Chipped edges get worse. | Lift the low side, if the floor is a good candidate (see below) |
Lot slabs and catch basins get their own parking lot repair guide.
We're a small, owner-operated crew. That's a good match for storefronts, restaurants, offices, small strip centers, shops, and churches with a few problem areas. If you've got a campus-sized list, we'll tell you honestly what we can take on and when.
Why Commercial Slabs Settle in Northeast Wisconsin
- Big roofs, few downspouts. One inch of rain on a 10,000 sq ft roof works out to roughly 6,000 gallons, sent to a handful of downspouts. If one dumps at the corner of your entrance walk, the soil underneath doesn't stand a chance.
- Loose backfill along the building. Walks and aprons that butt against the foundation sit on soil that was dug out and backfilled during construction. It keeps settling for years.
- Utility trenches. Poorly compacted backfill over gas, water, and storm lines sinks in a stripe you can sometimes trace across the concrete.
- Snow piles and plows. Plow piles on the same island all winter add weight, then soak the ground for weeks in spring. Plow blades chip any raised edge.
- Salt and freeze-thaw. Salt brine runs into open joints. Water under a slab freezes, lifts it, thaws, and leaves it sitting on a soft spot.
- Clay underneath. Much of Brown County sits on heavy red clay subsoil. It drains slowly, so water that gets under a slab stays there, keeps the soil soft, and helps open up voids under the concrete.
The Liability Side
A sunken panel is cheap to fix and expensive to explain.
Wisconsin's safe-place statute (Wis. Stat. 101.11) holds employers and owners of public buildings to a higher duty than ordinary negligence to build, repair, and maintain their property so it's safe. How that applies to your walk or lot is a question for your attorney or insurance carrier, not a concrete crew. But a known trip edge sitting through another season is not where you want to be.
If a walk is part of the accessible route to your entrance, the ADA standards also cap vertical changes in level at 1/4" (up to 1/2" with a bevel). Our ADA sidewalk requirements guide breaks down the numbers.
Inside the Building: Shop and Warehouse Floors
Foam lifting works on interior slabs too, and the case for it is often stronger indoors, where tearing out floor means moving racking, equipment, and inventory, then waiting on new concrete to cure.
Good candidates include a section that dropped along a utility trench, floor drain, or old addition; joint offsets in forklift lanes; and areas that sound hollow when you tap them or drag a chain across them.
What we need to know first:
- In-floor heat. A lot of Wisconsin shops have radiant tubing in the slab. Drilling into a heat loop is an expensive mistake, so we need to know where the tubing runs before deciding whether lifting is an option. With the heat running, an infrared camera can often show the loops.
- Drains and under-slab plumbing. Foam follows open gaps and pipes, so we plan the hole pattern around them.
- What's sitting on the slab. Racking anchored across a joint, machine bases, and vehicle lifts change how a slab moves. Heavy equipment may need to come off the section we're raising.
- How flat it has to be. If your equipment needs a precision floor, that's a conversation before we quote.
Working Around Your Hours
- Walk on it right away. Drive on it the same day. No curing period, no barricades sitting out for a week.
- One section at a time. On an entrance or drive lane, we can usually work one part while people use the rest.
- Early or off-hours starts can be arranged when an entrance, dock, or drive-thru can't be blocked during business hours.
- Hours, not days. Most small commercial jobs, like a few entrance panels or a dumpster pad, are done in hours. The rig parks at the curb or in a nearby stall.
We lift from spring thaw to freeze-up, because frozen ground won't let us lift accurately. If you've got a list, get it to us well before the snow piles show up. For the step-by-step, see our concrete lifting process.
When Lifting Isn't the Fix
- The concrete is broken into pieces or crumbling. A shattered dumpster pad or a badly spalled entrance slab needs replacement by a concrete contractor.
- The slab was pushed up, not down. Frost and tree roots raise slabs, and foam can only raise concrete. Grinding or replacement may make more sense.
- The lip is tiny and the slab is stable. A small edge on a solid walk can often be ground into a bevel. You may not need us at all.
- Water is still washing soil out. A broken storm line or a drain emptying under the slab will keep undermining it. Fix that first, or at the same time.
- It's asphalt, or the building itself is moving. Asphalt is a paving contractor's job. Cracked foundation walls or a failing dock wall call for a structural engineer.
Keep Water and Salt Out After the Lift
Lifting fixes the slab. Water is what sank it. Here's the follow-through, in the order the work happens.
- Move the roof water. Extend downspouts and scupper outlets away from walks and aprons. Nothing else lasts if a downspout keeps soaking the same corner.
- Clean the concrete. Pressure washing takes off oil drips, rust stains, and mildew around entrances, drive-thrus, and dumpster enclosures. Too much pressure or the wrong tip etches stripes into concrete, and a rotary surface cleaner gives a more even result than a wand alone. Keep wash water with cleaners out of storm drains: they generally run to local streams and the bay, not a treatment plant, and many Wisconsin communities prohibit putting anything but stormwater in them.
- Caulk the joints. Open joints and the gap where a walk meets the building funnel meltwater straight under the slab. We seal them with a flexible, self-leveling polyurethane joint sealant, with closed-cell backer rod where the joint is deep, usually right after the lift. Joints need to be clean, dry, frost-free, and about 40°F or warmer, and traffic stays off fresh sealant as long as its label says.
- Seal the surface. Penetrating silane and siloxane sealers soak in and leave no coating on top. They cut down how much water and salt brine the surface absorbs.
On a combined job: clean, let it dry, lift, patch the holes, caulk, then seal once the caulk has cured.
What to Send Us for a Commercial Photo Quote
You don't need to meet anyone on site to get a number. Send us:
- Photos. A wide shot of each problem area showing the building, lot, and any drains nearby, plus a close-up of the worst edge with a tape measure standing next to it.
- Rough square footage. Length and width of each area is plenty. Paced off is fine.
- Hours you can't have work done. Business hours, delivery windows, the drive-thru rush, shift changes, events.
- Access. Where a truck can park near the work, gate or door codes, dock schedules, and who to call on site.
- What's in or under the slab. Floor drains, trench drains, catch basins, in-floor heat, known utility lines.
- Any notices from the city, a landlord, or an insurance inspection.
- Vendor paperwork requirements, if your company or property manager has them.