Houston, TX · Concrete Leveling
Concrete Leveling in Houston
Concrete leveling lifts sunken driveway, sidewalk, patio and pool deck slabs back into place in Houston, often in hours and for less than replacement.
01 — What this covers
The work itself
- Driveway and driveway apron lifting
- Sidewalk and walkway trip-hazard leveling
- Patio and porch slab lifting
- Pool deck leveling and void filling
- Garage floor and step lifting where accessible
- Polyurethane foam lifting
- Mudjacking (cement slurry lifting)
- Joint and crack sealing after the lift
02 — Detail
Why slabs sink in Houston
A slab sinks when the support under it disappears. In the Houston area that usually means clay that shrank during a dry spell, fill that was never compacted properly when the house was built, or water that washed soil out from under an edge through an open joint or a downspout.
Driveways often drop next to the garage, where roof water lands and the fill against the foundation was placed loosely. Sidewalks settle where tree roots dried out the ground. Patios sink at the outside edge, which tilts them back toward the house and sends every storm straight to the foundation.
The good news is that the concrete itself is often fine. If a slab is still in one piece or a few large pieces, it doesn't need to be broken up and hauled away just because the ground let it down. It can be lifted back to level and the empty space underneath filled.
03 — Detail
Foam lifting and mudjacking
There are two main ways to lift concrete. Mudjacking, also called slabjacking, pumps a cement and soil slurry through holes about an inch and a half across. The slurry fills the voids and raises the slab as pressure builds. It has been done for decades and works well on heavier slabs.
Polyurethane foam lifting injects an expanding foam through smaller holes, around five-eighths of an inch. The foam is much lighter than slurry, adds almost no weight to soft clay, resists water and cures in minutes, so the slab can usually be walked on and often driven on the same day.
Each method has its place. Foam costs more per pound but needs fewer and smaller holes and is less likely to load weak soil; slurry is often chosen where large voids need filling. A contractor should explain why they recommend one for your slab, rather than offering only the one they happen to own.
04 — Detail
What leveling can and can't fix
Leveling works on flatwork: driveways, sidewalks, patios, porches, pool decks and some garage floors. It is at its best when a slab has dropped as a unit or in a few large pieces, when the concrete surface is still sound and when the cause of the settlement is understood.
It isn't the answer for concrete that is crumbling, for slabs broken into many small pieces or for thin overlays. It also isn't foundation repair. If the house's slab foundation has moved, with cracks in brick, sticking doors or sloping interior floors, that calls for a foundation specialist and a different kind of support.
Lifting doesn't stop the cause on its own. If a downspout dumps water at the edge of the driveway or a joint lets rain run under the slab, the soil will keep washing out. Fixing the drainage and sealing the joints after the lift is what keeps a leveled slab level.
05 — Detail
How a lift is done
The crew marks the low areas and drills a pattern of holes through the slab. Material is injected slowly, a little at a time, while someone watches the slab rise against a string line or a straightedge. The goal is a controlled lift, not a rush: pushing too fast can crack a slab or raise the wrong side.
Once the slab is back where it belongs, the holes are patched with a cement mix, the cracks and joints along the lifted area are sealed and the site is cleaned up. On a typical residential driveway or sidewalk the work takes part of a day, rather than the several days a tear-out and pour would need.
The patched holes stay visible as small circles, more noticeable on colored or stamped concrete. Ask to see a finished job so you know what to expect. For most homeowners a few round patches are a fair trade for a level, safe slab and no week of torn-up driveway.
06 — Detail
Trip hazards and when to act
A sidewalk panel an inch higher than the next one is enough to catch a toe. On a walkway used by children, older relatives or delivery drivers, leveling those offsets is often the most useful concrete work a homeowner can do, and it is usually quick.
A slab that is dropping also tends to drop faster once water can get underneath it. Leveling early, while the void is small and the concrete is still in one piece, costs less than waiting until the slab breaks and has to be replaced.
Signs it is time to call: water pooling where it didn't before, a gap opening between the driveway and the garage floor, a patio that now slopes toward the house, or steps pulling away from the porch. Each of those can usually be measured and corrected in one visit.
How we work
Step by step
- 01
Call back to understand which slabs moved, when, and where water collects.
- 02
Site visit to measure the drop, check the concrete and look for the cause.
- 03
Written estimate naming the method, the number of holes and what's included after the lift.
- 04
Controlled lift, hole patching and sealing of joints and cracks.
- 05
Advice on downspouts, grading or joints so the soil stops washing out.
What it costs
Leveling is usually priced by the area lifted and the material needed to fill the voids underneath, which nobody can know exactly until the slab is drilled. A fair estimate explains how any extra material would be charged.
Questions
Concrete Leveling — asked and answered
Is foam or mudjacking better?
Neither is better everywhere. Foam is lighter, cures in minutes and needs smaller holes; slurry is heavier but often fills large voids economically. The right choice depends on the slab, the soil and the size of the voids.
How long does concrete leveling last?
As long as the support under it stays put. Lifting fills the void, but if water keeps washing soil out, the slab can drop again. Fixing drainage and sealing joints after the lift makes the biggest difference.
Can you level stamped or colored concrete?
Yes, it can be lifted the same way, but the drilled holes will show as small patches. Color-matching the patches helps; it rarely makes them invisible.
Can you level the floors inside my house?
No. Sloping floors, cracks in walls or doors that stick point to foundation movement, which needs a foundation repair company. Leveling is for driveways, walkways, patios and other flatwork.
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