Cedar Park · Williamson County
Concrete Slab Leveling in Cedar Park, TX
Slabs on Cedar Park's mixed ground crack and settle where rock meets fill. Polyurethane foam lifts patios, walks and garage slabs and fills voids from erosion. It is light and quick to cure. Mudjacking uses a heavier cement slurry that needs larger holes. We also fix the runoff that caused the void. Leveling cannot fix rock heave, but it handles fill settlement well.
Concrete Slab Leveling for Cedar Park homes
Concrete slab leveling raises sunken patios, pool decks, garage floors and walkways without breaking them out. In Cedar Park, much of the concrete is under twenty years old, poured during the fast growth of recent decades. That might sound young, but slabs can still drop. Builders often place patios on fill dirt next to the house, where backfill around the foundation is looser than the ground around it. Rain finds the gap between the patio and the wall, soaks into the fill and compacts it. The slab then settles, leaving a slope toward the house or a gap at the edge. The gap often shows first as a dark line along the wall, and water running into it speeds the sinking each time it rains hard.
Foam leveling injects a lightweight polyurethane through small holes in the slab. It expands, fills the void and lifts the concrete. Mudjacking uses a heavy mix of cement and soil, pumped through larger holes. Foam weighs only a few pounds per cubic foot, while mudjacking slurry weighs more than 100 pounds per cubic foot. On a patio over fill dirt, the lighter material adds less load to ground that is already settling. On a thick, heavy slab over firm soil, mudjacking may be a reasonable lower-cost option. In Cedar Park, where rock may lie just below the fill, a contractor should probe to see where the void is. Either way, the injection holes are small and are patched afterward, and the slab can often be used again quickly once the work is done.
Stop the water first. If a downspout or sprinkler soaks the fill beside the patio, the slab will sink again, so fix the source with a downspout line, a short drain or regraded soil. Leveling also does not replace a structural fix. A slab that is part of the home foundation is not a leveling job, and a structural engineer should evaluate it. For outdoor flatwork, check HOA rules, since a few require approval for changes near property lines. Seal the joints afterward with a flexible sealant to keep water from returning to the same weak spot. Ask for a written scope that lists the material, the number of holes and the target height, so everyone agrees on what finished looks like. It also helps if you want a second opinion.
What to know in Cedar Park
Backfill settlement near the wall
The strip of soil along a foundation is usually looser than the ground around it, because it was dug and refilled during construction. Patios and porches that sit on that strip are the first to drop. Lifting them works, but only if water is kept from soaking the backfill again. Ask about grading and gutters as part of the plan.
Probe before you inject
Limestone close to the surface means the void under a slab may be shallow and uneven. A careful contractor taps and probes to map where the slab is hollow before drilling. Injecting in the wrong spot can lift one corner too far or crack a thin panel. Ask how the crew checks progress as the slab rises.
Foam or slurry for your slab
Foam uses smaller holes and adds little weight, which helps over soft fill. Slurry costs less on large, thick slabs but is heavy and needs bigger holes. Neither is better for every job. Ask which material is proposed, why it suits your slab and soil, and how the patched holes will look when finished.
Signs you may need concrete slab leveling
- Water puddling on a slab that used to drain
- Gaps between the slab edge and the soil or the house
- Trip hazards that catch toes or cane tips
- Cracks running across a settled section
How concrete slab leveling works
One firm boundary: we level exterior slabs that are separate from your house, such as patios, sidewalks, steps, pool decks, and driveways. We do not lift the house slab or do structural foundation repair, which includes piers and slab jacking under the home. Mudjacking and foam can only lift slabs that are not structurally attached to the foundation of the house, and lifting a house calls for engineering. If a patio is tied to the house with rebar, or if you see cracks in interior floors and walls, stop and get a structural engineer or a foundation repair company to look first. They can tell you whether the movement is cosmetic or serious, and our work is then planned around their findings.
How can you tell when a slab is a good candidate? Look for a step at a joint, a slab that tilts toward the house, or a hollow sound when you tap it with a hammer or the heel of a shoe. If the concrete is mostly intact and the settling is under a few inches, leveling is usually practical. If the slab is shattered, or the soil under it is washing away fast, the underlying cause comes first. Before any drilling, Texas law calls for an 811 notice at least two business days before digging. Leveling holes are shallow, but buried lines can run under patios and walks. Check HOA and city rules too, especially for slabs near an easement.
What to expect on a Cedar Park visit
- 01
Inspect the slab and the cause
We look at slab thickness, cracks, joints and how far it has dropped. We also trace the likely cause, such as a downspout, irrigation leak or low ground, because a slab will settle again if the water problem remains. Photos and a quick level reading are taken, so we can show you exactly how much lift the slab needs.
- 02
Mark injection points
The slab is mapped, and we mark a pattern of small drill locations based on size and the amount of lift needed. Foam holes are small, usually about five eighths of an inch, so the pattern is less noticeable than a mudjacking layout. Hole spacing is usually tighter near edges and corners, where slabs sag most, and wider across the middle.
- 03
Drill through the slab
We drill the marked holes straight through the concrete into the void below. Dust is controlled, and we protect nearby landscaping and finished surfaces. Holes are kept clear of rebar, post-tension cables and known utility locations. A hollow tap test before drilling tells us where voids sit, which helps us avoid drilling over solid soil.
- 04
Inject in small stages
The expanding foam is injected slowly while we watch the slab. We use levels and string lines to track the lift, working in small steps so one corner does not jump ahead of its neighbor and crack the concrete. Foam expands as it reacts, so the amount is metered carefully, and we stop the moment the slab reaches grade.
- 05
Check the grade and joints
Once the slab is at the target height, we confirm it drains the right direction and that joints line up. A slab raised too far can trap water or create a new lip, so we measure before moving on. Water should run off the slab toward the yard, never toward the house, so we confirm that direction by pouring a bucket across it.
- 06
Patch, clean and review
Holes are filled with a non-shrink patch, and the work area is cleaned. We explain the cure window, what to watch over the next few weeks, and which drainage fixes will help protect the lift. Plan on avoiding heavy loads like furniture sets or planters for the stated cure window, even if foot traffic is allowed sooner.
Our approach in Cedar Park
- We walk the property in Cedar Park and trace where water comes from, where it collects and where it can legally go
- We explain what we find in plain language, with photos where they help
- Repairs and installs are planned around Williamson County permitting requirements
- You get written options before any repair work begins
- We call 811 to mark buried utilities before any digging
Soil and drainage conditions around Cedar Park
Problems in Cedar Park usually involve water running or seeping where it should not. Downspouts empty onto slopes and erode the soil. Water sits on the rock layer and appears as wet patches in yards below. Retaining walls hold back water that has no way out. Sidewalks and driveways crack where fill meets rock. Patios sink where erosion cuts voids under them. Fixes include French drains that catch seepage, buried downspout lines, catch basins at the base of slopes, swales and selective regrading. Foam leveling lifts settled concrete, and sealing slows water entry at joints. If you notice stair-step cracks or sticking doors, a structural engineer or foundation repair company should evaluate the house. We do not do piers or structural repair, but we can improve the water control around the home.
Concrete Slab Leveling questions from Cedar Park homeowners
Why did my patio sink so soon?
Newer homes often have patios resting on backfill, the loose soil placed against the foundation after it was built. Water gets in along the edge, compacts the fill and drops the slab. Poor gutters, sprinklers or a low spot nearby make it worse. Leveling can lift it, but the water source should be addressed too. Fix the gutter and soil slope first, then lift the slab.
Can you lift the slab inside my house?
No. We handle patios, pool decks, walkways, driveways and similar flatwork, not the structural slab under your home. If floors inside slope or you see cracks in walls, call a structural engineer or a foundation repair company to evaluate it. Drainage work outside can then help control moisture around the house. Cracks, thickness and what is underneath all affect whether lifting will hold.
Is leveling cheaper than replacing the slab?
Usually, yes, because there is no demolition, haul-off or new pour. Prices vary with slab size, the amount of lift and the material used, so costs differ from site to site and are not a quote. Replacement may still be better when concrete is broken, crumbling or too thin to lift in one piece. Ask for a written estimate that lists the material and the number of holes.
How long before I can walk on a leveled slab?
Foam generally sets within minutes, and many contractors say foot traffic is fine shortly after the work. Mudjacking needs longer. Your contractor should give you a clear timeline for your slab. Vehicle traffic on driveways may require a longer wait, so ask before parking on it. Ask about the cure window for furniture and planters too, not only for people, since heavy items stress a fresh lift.
Will the slab sink again?
It can if the cause is still active. Leaking downspouts, irrigation lines and runoff under the slab keep eroding the base. Foam resists washout better than cement slurry, but it does not cure a water problem. Fix the drainage and the lift is more likely to last. A gutter extension is cheap compared with repeating the lift, so many owners fix it at the same visit.
Is leveling cheaper than replacing the slab?
Often, but not always. Leveling avoids demolition, hauling and new concrete, so it is commonly less expensive than replacement for sound slabs. If the concrete is crumbling or badly cracked, replacement may be the better value. Costs vary by site, and a general market range is not a quote. Ask for photos of the slab edges so you can judge condition before choosing between lifting and replacing.
More about concrete slab leveling → · All services in Cedar Park →
Need concrete slab leveling in Cedar Park?
Call or send a request. We will look at where the water goes, check the grade and give you a written estimate.