A slab that has dropped an inch at a joint is a trip hazard today and a drainage problem next season, and lifting it back is often a quarter of the cost of replacing it. The catch is that lifting treats the symptom. If water is still running under the slab from a leaking line or a bad downspout, the void will return, so we look for the cause before we drill the first hole.
We level and lift settled sidewalks, entrance slabs, loading dock approaches, warehouse floors, parking areas and equipment pads using injected polyurethane foam or cementitious slurry, depending on the weight above and the size of the void. Holes are small, the equipment is compact and most areas can return to service within a short time after the lift, which matters to owners who cannot close a dock or an entrance for long.
We also tell owners when lifting will not work: a slab that is broken into many pieces, or one that has failed from heavy overload, usually needs replacement. Below is how we decide, how we plan the work and what we ask from the owner.
Why slabs settle in this part of Texas
Midland is dry, with a normal precipitation of about 13.51 inches a year at the airport, so settlement here is more often tied to localized water than to constant wet soil. A cracked sprinkler line, a downspout that dumps at a slab edge, or a poorly compacted utility trench can wash fines out from under a slab in a few seasons. The 1991 to 2020 normals for the same station show 24 days at or above 100 degrees F and 58 mornings at or below freezing, and that wide swing opens joints and lets runoff in.
Public and private investment also changes ground loads. Improvements in downtown Midland, such as the $42 million Bush Convention Center and the $22 million Centennial Park along Texas Avenue, cited in the city's Hotel Santa Rita release, bring new paving and heavier foot and vehicle traffic. Campus work adds more: the University of Texas Permian Basin built a three-story, 105,801 square foot engineering building on its Midland campus. Walks, plazas and service drives around such buildings are the places we most often see small settlements.
Finding the cause, lifting, and checking the result
We begin with a level survey to measure the elevation difference across the slab and mark the areas that have dropped. We sound the slab for hollow zones, check drainage and ask about nearby plumbing. If we suspect a leak, we recommend a plumber before lifting, and if a utility line crosses the slab, we confirm its location.
Next we choose a material. Foam is light and cures quickly, so it suits thin slabs, sensitive subgrades and sites that need quick reopening. Slurry has more weight and is common under heavy slabs and in deep voids. We drill small injection holes, lift in measured stages while watching a laser or level, and stop when the slab reaches the target elevation. Afterward we patch the holes and check joints and edges, and we recommend joint sealing and repair where cracks or open joints remain.
What we ask before we quote
Photos help, but we need to know how the slab is used. A walkway that sees foot traffic needs one tolerance, while a forklift aisle needs another. We ask about the age of the slab, any history of prior lifting, the thickness if known and whether the slab has dowels or tie bars at joints. Reinforcement can change how the slab responds to lifting, and we plan injection points accordingly.
Weather and temperature also matter. In the hottest weeks we work in early hours, since materials behave differently at high surface temperatures. Where a slab is next to a building or a sidewalk that connects to others, we level the connected sections together so the repair does not simply move the trip point a few feet down the walk.
Owners who use lifting
Property managers and commercial developers call us most often, because entrances, parking and walkways draw tenant complaints and liability risk. Industrial and warehouse operators call about dock aprons, aisles and floor joints that make forklifts bounce, which damages product and equipment.
Public owners and campus facility groups form a third group. Schools and healthcare owners have strict rules about accessible routes and trip hazards, and they want repairs done with minimal disruption during the school or clinic day. We adapt hours, set barricades and clean up before the first student or patient arrives.
On any property, we recommend a short walk-through with the owner after the lift. We point out the corrected areas, show the injection patches and discuss what to watch, such as new cracking at a joint or standing water after a rain. That conversation tends to catch a lingering drainage problem while it is still a small repair, and it gives the owner a clear picture of what was done.
Schedule and return to service
Most lifts take hours, not days. A typical visit includes setup, drilling, injection and cleanup in a single working day for small areas, and larger floors may be divided into zones that can stay in use. Foam usually allows traffic after a short wait, while slurry takes longer to gain strength, and we tell the owner which one applies before we mobilize.
Access is part of the schedule too. Small injection rigs fit through gates and doorways that a pump truck cannot, and they can work from a pickup bed on sites with tight parking. We still need a clear path to the slab, a water source for cleanup and a place to stage material, so we ask for those in advance and confirm them the day before the visit.
We combine nearby jobs where we can, so a property with several settled spots receives one visit instead of several. If the settlement has an underlying drainage problem, we place the lifting after the drainage correction, and we note any areas that should be monitored over the next season. A short written summary follows each lift, with elevations before and after.
Send photos of the settled area
Send pictures and a short description of the slab, its use and any known leaks. We will visit, measure the settlement and quote a lift or a full replacement, based on what the slab needs.
Common Questions
How long does a lifted slab stay in place?
If the cause of settlement was addressed and the injected material is sound, the lift is typically long lasting. If water continues to wash soil away, the void can return. We therefore ask about drainage and leaks as part of the estimate.
Is foam or slurry better?
Neither is better in every case. Foam is lighter and cures quickly, which suits thin slabs and sites that must reopen soon. Slurry is heavier and can fill larger voids. We recommend one based on the slab and subgrade.
Can any slab be lifted?
No. Slabs that are shattered, too thin or failing from structural overload may not lift cleanly, and we say so. Replacement can be the better choice, and we price that option too.
Will lifting close my entrance or dock?
Usually only for a short period. We schedule around your operations, stage work by zone and let you know when traffic can resume.
Do you level interior floors?
Yes, in warehouse and industrial floors where settlement or curling has created an uneven surface. We assess equipment loads and floor flatness needs before recommending a method.