A concrete slab is only as good as what sits under it. We pour slabs for garages, patios, sheds, additions and commercial floors across Norcross, and most of the work happens before a truck ever shows up. We dig out the soft material, bring in and compact a stone base, and set the forms to a grade that moves water away from the structure. Reinforcement goes in next, either wire mesh or rebar on chairs so it sits in the middle of the slab where it does its job, not flat on the ground underneath. None of it shows once the concrete is down, which is exactly why we take our time on it.
Water is what undoes most slabs. This area sees about 50 inches of rain a year, and a slab poured flat, or on a base that holds moisture, settles and cracks along the low side. Soil varies from one lot to the next, so every site is tested individually before work starts, and the base depth follows what that test shows rather than a number we use everywhere. We cut control joints so the slab cracks where we choose, in a straight line, instead of wherever it wants. Then we let it cure properly, because concrete rushed into service stays weaker for the rest of its life.
A slab gets priced after we have walked the site, not over the phone. Thickness drives most of it: 4 inches suits a shed pad or patio, while 6 inches with rebar suits a slab carrying a vehicle or a workshop. Then come excavation depth, the compacted gravel base, the vapor barrier, and whether a pump truck is needed to reach the pour. Our estimates list each of those separately. Call for a free estimate.
Most driveways we pour are 5 inches thick over compacted crushed stone, with rebar set on chairs so the steel sits mid-slab instead of lying in the dirt. Where the driveway meets the street apron or takes delivery trucks, we thicken the edge. Control joints are cut at regular spacing so the slab cracks where we choose, not where it wants. Broom finish gives grip. Stamped or decorative borders are there if you want pattern.
Interior floors go down over a vapor barrier, then get a steel-trowel finish if they stay bare concrete, or a lighter finish if tile or wood goes on top. Garage and basement floors are the usual residential work. Commercial spaces in Norcross often need a floor that takes racking, carts and steady foot traffic. Polished and stained surfaces are options, though a floor only polishes as well as it was placed and cured.
Not every cracked slab needs tearing out. Hairline shrinkage cracks can be routed and sealed, and a section that has settled can often be lifted with the void underneath filled. What we look at first is why it failed: water running under an edge, a base that was never compacted, or roots pushing up from below. Patch the surface without fixing that and the crack comes back. When a slab is broken through in several places, replacing that section is the honest answer.
Walkways are usually 4 inches thick with a slight cross slope, so rain runs off instead of sitting in a puddle by the front door. We tool control joints along the length and set expansion joints where the walk meets the house, the driveway or the steps. A broom finish keeps it from turning slick when wet. A new walk can be matched to an existing finish, though fresh concrete always reads a shade lighter for a while.
A slab is only as good as the ground under it, so that is where our work starts. We test every site before a form goes down, because conditions change from one lot to the next and a guess shows up later as a crack. Then we build the base to suit what we find: compacted subgrade, the right depth of stone, and reinforcement sized to the load the slab will carry. A patio and a driveway that takes a loaded truck are not the same job, and we do not pour them as if they were. None of this is visible once the concrete sets. It is still most of the work.
Water is the other thing we plan around. The area sees about 50 inches of rain a year, and a slab that sheds it toward a foundation or holds it in a low corner will cause trouble long after the trucks leave. We set the slope and lay out control joints before the pour, not after it. Every surface gets a finish that suits its use: a broom texture where people walk in the wet, a smoother trowel inside a garage or workshop. Those choices are easy to get right on the day and hard to fix later. On a Norcross property or anywhere else we work, that is the standard. Call for a free estimate.
Before anything gets formed, we walk the property and look at where water goes now and where it will go once the slab is down. Soil varies from one lot to the next, so every site is tested individually before work starts. We check the existing grade, any old surfaces that need breaking out, utility locations and whether a truck can reach the pour. Then we mark the layout on the ground.
Most slab failures start under the concrete, not in it. We strip topsoil, roots and anything organic, cut down to firm subgrade and compact it. Crushed stone goes on next, graded and compacted in lifts. Soft spots get dug out and replaced, never covered over. Where a slab meets the house, we set the pitch to carry water away from the foundation instead of toward it. Skipping this step is how settled driveways happen.
Forms are straight lumber or steel, staked tight, set to finished height and pitched for drainage. Inside them goes the reinforcement: rebar on a grid for driveways and anything carrying vehicles, welded wire mesh or fiber for lighter patios and walks. Steel sits up on chairs so it ends up in the middle of the slab, where it actually does structural work. Expansion joints go wherever new concrete meets an existing structure.
Pour day moves fast, and it goes well because of the planning before it. The truck backs in or we pump over, depending on access, and we place concrete from the far end toward the exit. Nobody adds water at the chute to make spreading easier. That weakens the surface and invites cracks. We screed it flat, work it around the steel, and keep a close eye on the forecast. The area sees about 50 inches of rain a year.
Once the bleed water leaves the surface, we float it and run the edges. A broom finish gives driveways and walks grip in the wet. Patios can go smooth trowel, exposed aggregate, or stamped and colored for a decorative surface. Control joints get tooled or saw-cut deep enough to decide where the slab cracks. Concrete does crack. The point is that it cracks straight, along a line we chose, instead of wandering across the middle.
Concrete keeps gaining strength for weeks after it looks done, and how it is treated early decides how it wears for years. We keep the surface damp or apply a curing compound so the top doesn't dry faster than the bottom. When it does, you get crazing and a dusty, flaking surface. Foot traffic returns well before vehicles. We give you the dates for your slab, based on the mix and that week's weather.
Sealer goes on after the slab has cured enough to take it. A penetrating sealer soaks in and leaves a broom-finished driveway looking like plain concrete while keeping out water, oil and road grime. Stamped and colored work usually gets a film-forming acrylic that deepens the color and adds some sheen. Either way, sealing is maintenance. Reapplying every few years keeps the surface tight and the color from fading.
A plain slab with a broom finish is the workhorse option, and for a driveway, a garage floor or the pad under a shed it is usually the right one. The texture gives tires and shoes something to grip. From there the choices widen. Stamped concrete takes on the pattern of stone, brick or slate. Color can run through the whole pour or sit on the surface. Exposed aggregate brings the stone inside the mix up to the top. Commercial slabs follow the same logic, built for heavier loads.
Every one of these starts the same way underneath. Soil varies from one lot to the next, so we test each site before work starts and build the base around what we find. Thickness and reinforcement follow the load: fiber or wire mesh for a patio, rebar for a driveway that takes a loaded truck. Decorative work adds steps on top of that structural base, never in place of it. A stamped patio is still a slab first, and it gets poured like one.
Most slab problems come from picking a finish for looks and forgetting what the surface has to do. With about 50 inches of rain a year, a slab needs enough slope to shed water away from the house. A smooth sealed stamp can turn slick when it is wet, so we add texture where people walk. Sealer on stamped and colored work wears and needs renewing. Control joints go where the cracks want to run, not where they look tidy. Call for a free estimate and tell us how the slab will be used.
Two slabs of the same size can come in far apart on price, and most of the reasons are visible from the curb or a shovel's depth down. Walk your property with this list before anyone quotes it. You will know which way the number is likely to move, and why.
| What changes the price | Which way | Why |
|---|---|---|
| An old slab, driveway or patio still in place | costs more | It has to be broken out, loaded and hauled off before any new work starts. |
| Roots, stumps or old footings under the work area | costs more | Anything that rots or shifts has to come out, or the new slab settles over it. |
| A clear path for the mixer truck to the forms | costs less | Concrete chuted straight from the truck saves the pump or wheelbarrow crew. |
| Slope across the site | costs more | A sloped yard needs taller forms, more fill and more grading to get a sound base. |
| Slab thickness the use calls for | costs more as it goes up | A driveway carrying vehicles needs more depth than a patio, so more concrete and a deeper base. |
| Rebar grid instead of wire mesh | costs more | Rebar takes more material and more time to cut, place and tie. |
| Downspouts or low spots that send water toward the pour | costs more | With about 50 inches of rain a year, water has to be regraded or piped away first. |
| Stamped or decorative finish instead of broom | costs more | Stamping adds materials, color and a crew working against the set time. |
When you compare bids, line them up on thickness, reinforcement type, base depth, and whether removal and haul-off are included. A lower number that leaves one of those out is quoting a different slab. Ask each contractor whether they test the soil before work starts. We test every site, because conditions vary from one property to the next.