Garage & Shop Floor Slabs in Green Bay, WI
Green Bay Concrete Pros replaces garage and shop floor slabs across Green Bay and Brown County, Wisconsin. We are a licensed and insured concrete contractor. A cracked or settled garage floor comes out and gets repoured on a compacted base and a vapor barrier, with thickened edges and control joints, so the new slab takes vehicles, cold, and moisture without breaking up.
The slab is four inches thick over four to six inches of compacted crushed stone, with a poly vapor barrier under it and reinforcement of mesh or fiber, in 4000 PSI air-entrained concrete. We thicken the edges where the walls and the door track load the slab, and saw-cut control joints so it cracks on our lines. A garage floor poured thin on bare clay, with no base and no barrier, sweats moisture, settles, and cracks across the middle.
The Base Under the Slab
A garage floor lives and dies by what is under it, same as a driveway. We dig out the failed slab and its soft base, then build back up in compacted lifts of crushed stone on solid ground. That base carries the weight of the vehicles and does not settle when the ground around the garage freezes. Skip it and the flattest pour in the world still sinks.
Vapor Barrier and Dry Concrete
Green Bay ground holds water, and a bare slab pulls that moisture straight up. We lay a poly vapor barrier over the base before the pour so the ground moisture stops at the sheet instead of coming through the floor. A dry slab is one you can coat or paint later. A slab with no barrier stays damp and pushes any coating right back off.
Thickened Edges and Control Joints
The load on a garage floor is not spread evenly. It piles at the edges and the door opening, so we pour those thicker. Then we saw-cut control joints across the field of the slab so the concrete cracks along tooled lines instead of wandering. Between the thick edges and the joints, the floor takes the traffic and the cold on our terms.
What It Costs
Garage and shop floor slabs in Green Bay run about $4,000 to $9,000. A standard two-car garage on a clean tear-out sits toward the low end. A larger shop floor, a deep base rebuild, or a slab that has to be worked around existing walls sits higher. Every floor gets a free written estimate first.
Tired of a garage floor that cracks and sweats? (920) 555-0163 gets you a free estimate. If the old slab has to come out first, we handle the tear-out in the same visit, and we pour garage floors in Suamico and Hobart too.
Why is my garage floor cracked and uneven?
The slab moved because the ground under it did. A garage floor poured on loose fill or wet clay settles in spots and cracks along the low lines, and in Green Bay frost at the edges makes it worse. We tear out the bad slab, compact a proper stone base, and pour a new floor that sits flat because the ground under it was built to hold it.
Does a garage slab need a vapor barrier?
Yes. A sheet of poly under the slab keeps ground moisture from wicking up through the concrete, which is what leaves a garage floor damp and helps a coating or paint fail later. We lay the vapor barrier over the compacted base before the pour. It is cheap while the ground is open and impossible to add once the concrete is down.
What are thickened edges and why do they matter?
The edge of a garage slab carries the most load, from the door track, the walls, and vehicles rolling on and off. We thicken the concrete along those edges so it does not crack under that stress. A slab poured one flat thickness edge to edge has its weakest concrete exactly where the heaviest load lands.
Can you replace a garage floor without redoing the walls?
Usually, yes. We can pull and repour the slab inside the existing garage walls, isolating the new floor from them so each moves on its own. We protect the base of the walls and the door track while we work. If the walls sit on the slab itself we talk that through first, but most garage floors replace as a slab on their own.