A concrete floor is a slab that has to carry weight, shrug off water and stay flat year after year, and most of what decides whether it does happens before the truck arrives. We install concrete flooring for residential and commercial property in North Decatur: garage floors, basement slabs, workshop floors, patios and the driveways that lead up to them. Some owners want a plain broom finish. Others want a decorative surface, stamped or colored, that looks as settled inside the house as it does outside. We pour both, and we build them the same way underneath.
The job starts with the ground. Soil varies from lot to lot, so every site is tested individually before we set a form or order materials. Around Alpharetta the dominant type is Rion soil, which drains well, but we never assume a North Decatur lot matches it until the test says so. From there we grade and compact the base, set the reinforcement at the right height inside the slab, and plan the joints before the pour, not after. Finishing and curing run at the pace the concrete sets, and that pace changes with the weather on the day.
Most concrete floors that fail do so because of water or a thin base. Our area sees about 50 inches of rain a year, and a slab poured over soft fill, or with nowhere for that water to go, will settle, crack or lift at the edges. Reinforcement laid flat on the dirt does nothing. It has to sit within the concrete to hold it together. Joints cut late let cracks choose their own line across the surface. With about 2 inches of snow a year against all that rain, water is the thing we plan around.
Getting it right costs time more than anything else. Proper base preparation, steel placed where it belongs, a mix suited to the conditions and a cure that is not rushed all add hours that a cheaper quote tends to leave out. We would rather spend those hours on the ground than leave a floor that starts cracking soon after it goes into use. The price of any project depends on its size, access, finish and what the site test turns up, so figures come after we have seen the property and measured it.
Whether the floor is going into a garage, a basement, a shop or a commercial unit, the approach stays the same: test the site, build the base, reinforce the slab, finish it well. Decorative and stamped surfaces follow the same construction underneath, with the design work done on top once the structure is sound. If you are planning a concrete floor in North Decatur, call us for a free estimate and tell us what the space needs to do. The more we know about how it will be used, the better the floor we can plan for it.
What moves the number on a slab is mostly what sits under it and around it. A soft or uneven subgrade means more digging and more compacted gravel. Thicker sections under posts or a future hot tub mean more concrete and more steel. Tight access can mean pumping instead of pouring straight off the truck. Removing an old slab adds its own line. We walk the site, test the ground, and price the slab from what we find there.
A driveway fails from the bottom up. We cut out the soft spots, lay and compact a gravel base, and set rebar on chairs so the steel ends up in the middle of the slab instead of lying in the dirt. Edges get thickened where tires roll off. Control joints go in at the right spacing, so the cracks that will come follow the lines. Broom finish is standard. Stamped and decorative borders are an option.
Interior floors (basements, garages, workshops, additions) need a flatter, harder surface than anything outside. We put down a vapor barrier over the compacted base, place the concrete, and power trowel it once it can take the weight. From there the finish is your call: a smooth troweled floor, a ground and polished surface, or a sealed floor that shrugs off oil and tire marks. Saw cuts go in early, before the slab decides for itself where to crack.
Not every cracked slab needs to come out. Hairline shrinkage cracks can be routed and sealed. A slab that has sunk at one corner can often be lifted and the void underneath filled. When the base has washed out or the concrete is breaking up across the whole surface, patching only buys time, and we will say so. We look at why it failed first. A repair laid over the same problem fails the same way.
Walks and paths are thin pours, so the base does most of the work. We grade them to shed water to the side, away from the house and off the path, set forms straight or on a curve, and tool the edges by hand. A light broom finish keeps them from getting slick when wet. Where a new walk meets a driveway or steps, we dowel it into the existing slab so the joint has something holding it together.
Every job starts on the property itself, looking at where water drains, what the slab has to carry and what is already in the ground. A garage floor under a loaded truck needs a different build than a patio under a grill. We test the soil at every site individually, since ground conditions change from one lot to the next. Then we call in utility locates, mark the layout and set the finished grades.
Most slab failures start here, not in the concrete. We strip topsoil, roots and anything organic down to firm subgrade, then bring in a crushed stone base and compact it in thin lifts with a plate compactor or roller. Soft spots get dug out and replaced rather than covered over. Where moisture matters for the floor finish, a vapor barrier goes down over the base, and the grade is set so water runs away from the house.
Forms are straight lumber or steel, staked tight and checked against a string line so the finished edge runs true. Patios and walks get a standard residential thickness, while driveways and garage floors that carry vehicles get more, with thickened edges where the slab needs extra support. Rebar on a grid or welded wire mesh sits on chairs in the middle of the slab. Steel lying flat on the dirt does nothing, and it is a common shortcut.
A ready-mix truck arrives with a mix ordered for the job, and we check it at the chute before it goes in. Adding water to make concrete easier to spread is the quickest way to weaken a slab, so we do not do it. The crew places concrete in sections, rakes it into the corners and screeds it level off the forms. Rain in the forecast means we move the pour rather than rush it.
Timing matters more than technique here. We bull float to push the aggregate down and bring cream to the top, then wait for the bleed water to leave before touching the surface again. Troweling too early traps water and leads to scaling and dusting later. Edges get rounded, control joints are cut so cracks land where we choose, and exterior surfaces get a broom finish for grip. Stamped and decorative finishes go on during this same window.
Concrete keeps gaining strength for weeks after it looks finished. If the surface dries too fast, it shrinks unevenly and crazes with fine cracks across the top. We keep it moist, either with a spray-on curing compound or by covering it, depending on the finish and the conditions that week. Foot traffic comes first and vehicles much later. Parking on a new driveway too soon is how edges and corners break off.
Once the slab has cured, a sealer protects it from water, oil and staining. On plain broom-finished driveways and patios we use a penetrating sealer that soaks in and leaves the surface looking natural. Stamped and colored concrete usually gets a film-forming acrylic that deepens the color and adds a slight sheen. Interior floors can take a harder epoxy or urethane coat. Sealers wear down with traffic and sun, so resealing every few years keeps the surface protected.
Most of what moves the price of a concrete job is on the site itself, and you can walk out and check it before anyone quotes you a figure. Two driveways the same size on the same street in North Decatur can come in far apart, because one sits on level, open ground with a clear run for the truck and the other has a cracked slab to break out first.
| What changes the price | Which way | Why |
|---|---|---|
| An old slab, asphalt or pavers still in place | costs more | It has to be broken up, loaded and hauled off before we can grade. |
| No room for a mixer truck to back up to the pour | costs more | Concrete then goes in by pump or wheelbarrow, which adds equipment and hands. |
| Ground that slopes or sits low | costs more | We cut, fill and compact the base so the slab lands at the right grade. |
| Downspouts or runoff aimed at the area | costs more | Water needs a way out, so we add pitch, drains or extra gravel base. |
| A driveway that carries trucks or trailers | costs more | Heavier loads call for a thicker slab and more reinforcement. |
| Tree roots or stumps in the footprint | costs more | Roots have to come out, or they lift and crack the surface later. |
| Irrigation, gas or electrical lines under the work | costs more | They get located and worked around or moved before we dig. |
| A sound, level existing slab | costs less | Sometimes it can be resurfaced instead of torn out and replaced. |
When you compare bids, set them side by side on the details, not the bottom line. Check the slab thickness, the reinforcement (rebar, wire mesh or fiber, and at what spacing), how deep the gravel base goes, and whether removing the old surface is included. Ask where the control joints go and how the concrete is cured. A low bid usually saves on one of those, and it shows in the slab a few years on.
Yes. We break the job into sections and work one lane or bay at a time, so cars and delivery trucks keep a path in and out while we cut, form and pour. Cones, signs and a marked route go up before any saw touches the surface. Fresh concrete needs time to gain strength before it carries vehicle weight. That section stays closed until it's ready, and traffic moves onto it only then.
The best one for your house is the contractor who walks the site before quoting, tests the soil, and explains the footing, the reinforcement and the drainage in plain terms. Ask how they handle water around the foundation. Ask what they do when the ground turns out different from what they expected. Someone who answers those questions clearly, and puts the answers in writing, is worth more to you than anyone claiming the title.
Before equipment rolls in, we lay plywood over any lawn or finished paving the trucks and wheelbarrows have to cross. Plants near the pour get covered. Washout goes into a lined pit, never into a storm drain or your yard. Saw cutting is done wet to keep the dust down. At the end of each day we pick up, sweep, and leave the property safe to walk through, because you still live there while we work.
Yes. A retaining wall on a slope is structural work first and decorative work second, and most of what matters sits below grade. We test the soil on every site before work starts, then size the footing and the steel reinforcement to the load the wall has to hold back. Drainage matters as much as the concrete. Gravel backfill and weep holes let water out instead of letting it push. Taller walls get an engineered design.
Ask any contractor you're considering to show current license, insurance and bonding paperwork before you sign a contract, then check it yourself with the issuing agency and the insurer. A certificate of insurance should come straight from the insurance company, not as a photocopy handed over on the driveway. Keep copies with your project file. If the name on the paperwork doesn't match the name on the estimate, stop there and ask why.
There isn't one width that fits every job. For a commercial sidewalk, the width comes from local code, the site plan approved for that property, and federal accessibility rules covering wheelchair passing space, cross slope and curb ramps. We build to the approved drawings and the permit, not to habit. When the plans leave width or slope unclear, we settle it with the designer before a single form goes down.