Questions
Concrete Leveling Questions
The ones people actually ask on the phone, including the ones where the honest answer is that you should call somebody else.
Concrete leveling lifts a settled slab by injecting material beneath it through small holes. In Rockford it runs $500 to $3,000 for most residential jobs, takes a few hours, and the surface is usable the same day.
The basics
- What is concrete leveling?
- Concrete leveling lifts a settled slab back to its original height by drilling small holes through it and injecting material into the void underneath until the concrete rises. Nothing is demolished, nothing is poured, and the surface takes weight the same day.
- How long does a job take?
- Most residential jobs are a few hours. A single sidewalk section can be under an hour; a full driveway with several settled panels takes most of a day. The lift itself is quick, and the time goes into setup, checking which panels moved, and patching.
- Can I drive on it afterwards?
- With polyurethane foam, within minutes of the lift, because it cures almost immediately. With mudjacking, the same day once the slurry has set. Neither needs the days of cure time a fresh pour requires.
- How big are the holes and will I see them?
- Foam injection uses holes about the size of a penny. Mudjacking needs larger ones, an inch or more. Both get patched with grout, and the patches stay visible as small round marks. They fade with weathering but they do not disappear.
- Does it work in winter?
- Foam injection works in cold weather and through most of a Rockford winter, since it cures chemically rather than needing warmth. Frozen or snow-covered ground makes access harder and can mask how far a slab has actually dropped, so scheduling often slips to spring by choice rather than necessity.
Cost
- What does concrete leveling cost in Rockford?
- Mudjacking runs $3 to $8 per square foot and polyurethane foam $5 to $25. Most residential jobs total $500 to $3,000. Replacing the same slab runs $2,000 to $10,000.
- Is leveling always cheaper than replacing?
- For an intact slab, leveling is typically a third to a half the cost of replacement and there is no cure time. Where the concrete itself has failed, crumbling, spalling or cracked through in several places, replacement can be the better value even though the sticker price is higher.
- Why do quotes vary so much between companies?
- Usually method and scope. A foam quote and a mudjacking quote for the same slab are not comparable prices for the same thing. Scope varies too: one crew quotes the panel you reported, another walks the whole run and quotes everything that has moved. Ask which you are being given.
- Do you charge for the quote?
- Assessing the slab and giving you a fixed number costs nothing. Photos and a measurement are often enough to quote without a visit at all, which is faster for everyone.
Whether it will last
- How long does concrete leveling last?
- Polyurethane foam typically holds 10 to 15 years and mudjacking 5 to 10 years. Neither changes the soil conditions that caused the settling, so what actually determines the lifespan is whether the water feeding the void was dealt with.
- Will the slab sink again?
- It can, if the cause is still active. A downspout discharging beside the slab or a leaking buried line will wash soil out again regardless of what was injected. This is why a quote that mentions drainage is worth more than one that is only about concrete.
- Is there a warranty?
- Terms vary by contractor and by method, and they are worth reading rather than taking on trust. Ask specifically what happens if the same slab settles again within the warranty period, and whether the warranty survives if the drainage was never addressed.
Whether it is actually the slab
- Does a sinking driveway mean my foundation is failing?
- Usually the opposite. A house in Rockford sits on footings 42 inches down, below the frost line, while a driveway is poured a few inches into the ground. They are built to different rules and move independently. A drive pulling away from the garage is normally the drive leaving.
- When should I call a foundation contractor instead?
- Sticking doors and windows inside the house, stair-step cracking in brick or a foundation wall, a bowing basement wall, or a garage floor that dropped along the wall rather than in the middle. Any of those point at the structure rather than the flatwork.
- Are cracks in my driveway a problem?
- Surface cracking from shrinkage is normal and is not a sign of settling by itself. What matters is movement relative to the neighbouring slab. A joint with a lip you can catch a foot on has settled; a thin crack across an otherwise flat panel generally has not.
- My concrete is new. Why is it already sinking?
- New construction settles more often than people expect. The ground around a new house was excavated and backfilled, and that fill keeps compacting for years after the slab went down on top of it. Newer areas like Cherry Valley see this more than the older neighbourhoods do.
Working with us
- Which towns do you cover?
- Rockford and the surrounding Winnebago County towns: Rockford, Loves Park, Machesney Park, Roscoe, Rockton, Belvidere, Cherry Valley. Belvidere is in Boone County and is covered too.
- Do you need to visit before quoting?
- Often not. A wide photo, a low shot along the surface, and a measurement at the worst joint are usually enough for a fixed number. Larger or more complicated jobs get walked first, and that visit is free.
- What if lifting is the wrong answer for my slab?
- You get told that. A slab that is cracked through, crumbling, or moving because the foundation is moving will not be improved by lifting it, and quoting you for one anyway would be selling you a job that does not work.
Still deciding between methods? That is covered in detail on mudjacking versus foam. Want to check the slab yourself first? Use the free sunken slab checklist.
Question not answered here?
Send a photo of the slab and ask. You get a straight answer, and a fixed quote if you want one.