Concrete Resurfacing vs Replacement in Polk County

Concrete Resurfacing vs Replacement: One Question Settles It

An overlay is a thin new surface glued to the slab you already have, so it can only be as good as what it's stuck to. When the slab is level and solid and just stained, worn or crazed, resurfacing makes it look new for a fraction of the price. When the slab has moved, the new surface hides it only until the crack comes back through. So the concrete resurfacing vs replacement call is about the slab first and looks second.

Concrete Network's resurfacing guide draws the same line. The concrete underneath has to be sound, heaved or badly cracked concrete isn't a good candidate, and an overlay won't cure a soil problem. That's why every estimate starts with one question: is this slab still sitting where it was poured? Our concrete repair and resurfacing page covers the overlay systems themselves. This guide helps you choose between them and a new pour.

Six Checks to Run on Your Own Slab Before Anyone Quotes

Grab a level and a pencil. Ten minutes gets you a long way into the concrete resurfacing vs replacement question before a contractor shows up.

1. Lay a level across each crack. If one side sits higher than the other, the slab has moved. Flat on both sides points to shrinkage at the surface.
2. Measure the width. Concrete Network treats cracks and holes under about 1/4 inch as patch-and-fill repairs and says wider ones can point to a bigger problem.
3. Mark the crack ends and date them. Check again after a rainy season. A crack that grew is a crack that's still moving.
4. Look for ridges near trees. UF/IFAS notes that live oaks planted close to driveways and sidewalks can grow roots large enough to lift and crack them.
5. Watch where the water goes. Puddles on one panel, a washed-out edge or sand pushed out of a joint can mean the base is eroding. Concrete Network puts most sinking down to a poorly compacted subgrade or soil erosion, and names a leaky pipe as one cause of that erosion.
6. Read the surface. Flaking, pitting, oil stains and faded color are surface wear, which is what overlays are built for.

When an Overlay Is the Right Call

In concrete resurfacing vs replacement, an overlay wins when the trouble is skin deep: stains, a worn top layer, shallow pits, hairline crazing, a color you're tired of, or a surface that's gotten slick. It wins on price too. A spray-texture or microtopping overlay runs $3 to $7 per sq ft, and a stamped or decorative overlay runs $7 to $15 per sq ft. Concrete Network describes stamped overlays as polymer-modified cement layers roughly 1/4 to 3/4 inch thick, so they're a different product from a thin cosmetic coat.

Prep, not the topcoat, decides how long an overlay lasts. Concrete Network calls poor prep the most common reason overlays fail, and it names grinding or shotblasting among the most effective ways to rough up the surface. Cracks get filled before the overlay goes on. A professionally installed overlay can be expected to last 10 years or more, and Concrete Network rates a stamped overlay at 10 to 20 years or more with a fresh sealer every 2 to 5 years. See the stamped concrete page if the pattern is the point.

When Replacement Is the Honest Answer

Some slabs shouldn't get a new skin. If a panel has dropped at the garage door, if one side of a crack has stepped up, if a root is pushing a section out of line, or if a void has opened under the edge, the problem is below the surface. An overlay will follow the slab and crack along the same line. By the concrete resurfacing vs replacement test, those slabs are replacement jobs, or at least need the ground fixed first.

Sometimes a sunken panel can be raised instead. Slabjacking pumps a mix of sand, cement and fly ash under the panel to lift it back into place, per Concrete Network. The same guide warns that when roots or a leaky pipe are behind the damage, replacement may be the only choice. Where the whole slab is moving, tear-out adds $2 to $4 per sq ft and the new pour is $8 to $14 per sq ft for a driveway. We pour a driveway at 4 inches or more. The Florida Building Code sets 3.5 inches as the minimum for residential slab-on-ground floors, and 4 inches is practice. Our concrete driveway page lays out the full spec.

What Polk County Ground Does to a Slab

Polk ground isn't one kind of soil. UF/IFAS reports that Florida's sandy Entisols, about 7.5 million acres statewide, are more than 98 percent sand with low water-holding capacity, and that most flatwoods Spodosols, Myakka and Immokalee among them, are poorly drained. Candler sand, an excessively drained ridge soil, is the most common map unit at NRCS sample points in Winter Haven, Haines City and Lake Wales, yet all three also hold poorly drained flatwoods or muck units inside city limits. Two lots on the same street can sit on different ground. Sand shifts when water moves through it, so a base that wasn't compacted or a downspout that dumps at the slab edge can end up as a settled panel.

Then there's the limestone under it. USGS says west-central Florida, Polk included, sits on carbonate rock under a sand and clay cover, and that sinkholes are a common, natural feature. Where the cover is thick, permeable sand, they tend toward slow cover-subsidence. A sag that keeps widening, with cracks fanning out across several panels, isn't an overlay problem. State maps of reported Polk sinkholes also include non-karst causes like collapsed septic systems and water mains, so a sunken slab doesn't prove a sinkhole. Take that question to a geotechnical engineer, not a concrete estimate. Roots, drainage and a poorly compacted base are the other causes to rule out.

Pricing a 600 Sq Ft Driveway Three Ways

Here's the math on a sound but stained two-car driveway of 600 sq ft, using our ranges. All of it comes with a free written estimate after we see the slab.

• Spray-texture or microtopping overlay: 600 sq ft at $3 to $7 is $1,800 to $4,200.
• Stamped or decorative overlay: 600 sq ft at $7 to $15 is $4,200 to $9,000.
• New broom-finish driveway: 600 sq ft at $8 to $14 is $4,800 to $8,400, and tear-out adds $2 to $4 per sq ft on top.

A 300 sq ft patio works the same way: an overlay is $900 to $2,100 and a new broom-finish pour is $2,400 to $4,200. On a sound slab, the plain overlay wins by a wide margin. On a moving slab, you pay twice: the overlay cracks, then the tear-out and new pour still come. In the end, concrete resurfacing vs replacement comes down to the slab. An overlay is cheap insurance on a good one and a bad bet on a bad one. The Winter Haven concrete cost guide has every other job priced.

Rainy Season, Heat and Cure Time

The National Weather Service puts the rainy season for most of West Central Florida at May 25 to October 10, with the heaviest rain from July to early September. Overlay products carry their own limits on surface temperature and rain after application. The installer's product sheet sets the schedule, and a fresh overlay needs a dry window. A new slab has its own clock. NRMCA says curing should start right after finishing and typically run 3 to 7 days, and concrete left to dry out can lose as much as half its potential strength. Either job goes smoother in the drier months, but you can do both year-round if you watch the forecast.

Permits and Paperwork: Overlay or New Pour

A new driveway, apron or slab raises the permit question. The part in the public right-of-way is the piece most likely to need one. Florida's under-$7,500 exemption in section 553.79 may reach a small job on a single-family property with a written request, but not a lot in a flood hazard area and not structural work, so confirm with the building department. An apron or public walk in the right-of-way is treated differently from a private patio, and the office can tell you which you have. A lien-law Notice of Commencement applies over $2,500 either way. Our Polk County concrete permits guide sorts out who issues what, city by city.

Whichever way the concrete resurfacing vs replacement call goes, ask about the permit before the work gets scheduled.