Concrete Leveling & Lifting in Green Bay

Yes. Concrete leveling, lifting, raising, slab jacking, polyjacking and foam jacking all describe raising an existing slab back into place. Polyjacking specifically means doing it with polyurethane foam, which is what we use. Mudjacking is the older method using a cement slurry.

Two liquid components are mixed at the gun and injected under the slab. The mix expands into a rigid foam that first fills the empty voids and then pushes up on the slab. We inject in short shots and watch a level or string line so the slab rises to the right height and stops.

The foam itself does not rot, wash out or break down in wet soil, so a lift typically lasts as long as the concrete does. What can cause new movement is the soil below the foam continuing to settle or water undermining the edges, which is why we seal joints and point out drainage problems.

It can, but it's uncommon when the cause is handled. Foam weighs only a few pounds per cubic foot, so it doesn't add load to weak soil the way a heavy slurry does. Sealing joints and moving downspouts away from slabs removes the most common cause of repeat settling.

The foam reaches most of its strength within minutes. You can usually walk on the slab as soon as we pack up, and drive on it the same day once the hole patches have set.

The holes are about 5/8 inch across, roughly the size of a penny. They're filled with cement grout and finished flush. On new concrete they blend in well; on weathered concrete the patches can be a shade lighter at first.

Usually, yes. A slab cracked into a few large pieces can be lifted piece by piece and the cracks sealed afterward. A slab broken into many small pieces can't be raised as one surface and is better replaced.

Most lifts are between one and four inches. Larger lifts are often possible when the slab is intact and there's room for it to move, and we judge those from your photos.

Once cured, the foam is an inert, rigid plastic that sits under the slab. During the injection we ask that kids and pets stay inside or away from the work area, and we clean up any overspray before we leave.

No. Our rig carries its own power and material, so we don't need to get into the house. We just need the concrete clear of cars and furniture and a way to reach it. We'll text when we start and when we're done.

We lift from the spring thaw until the ground freezes. Once the soil under the slab is frozen solid, lifting isn't reliable because the frozen ground moves again when it thaws. Photos sent in winter get a price and a spot on the spring schedule.