Slab Foundation Repair in Gregg County

Why slabs move here specifically

A slab-on-grade is a rigid plate. It tolerates the whole plate moving together and it does not tolerate one part of the plate dropping while the rest stays put. Everything about the Gregg County subsurface encourages exactly that unevenness.

The general soil map for this county and neighboring Upshur shows sandy upper soils sitting on firm clay-rich subsoils. Water enters the sand fast during a spring storm, reaches the clay, and stops. It then travels laterally along the top of the clay, following whatever slope the buried clay surface has — which is not necessarily the slope of your yard. That water arrives under one part of the house and not another.

Then the season turns. Longview's driest stretch falls in late summer, with August highs averaging around 95 degrees. The clay under the wet side gives up moisture and shrinks. The clay under the dry side was never saturated and has less to give. The result is differential movement, which is what cracks houses.

Add the fact that much of this county rolls rather than lies flat, so building lots are commonly cut on the uphill side and filled on the downhill side. Fill compacts over time. The filled corner of a slab is very often the corner that drops.

How slab piers work

Pressed concrete piers

Cylindrical concrete segments are hydraulically pressed into the ground beneath the foundation beam, one on top of the next, using the weight of the house as the reaction force. They are driven until the resistance indicates competent bearing soil. Widely used, relatively economical, and well suited to typical residential loads.

Steel pipe piers

Sections of steel pipe are pressed the same way but can generally be driven deeper and through more resistant layers. In parts of the county where the firm clay or weathered material is deeper or more variable, steel gives a better chance of reaching consistent bearing.

Helical piers

Screw-type piers turned into the ground with a torque motor rather than pressed. Torque readings correlate with capacity, so installation is measurable rather than inferred. Often chosen for lighter structures, additions, or locations where access limits the equipment that can be used.

No pier type is universally correct. The right answer depends on your soil profile, the load, the access and how far the house has to come back up. Be cautious of any company that installs only one type and recommends only that type.

What "lifting" actually means

A lift does not return a settled house to factory condition. Concrete that has cracked stays cracked. Sheetrock that has torn stays torn until it is patched. Doors that were re-planed to fit a settled opening may not fit once the opening returns to square. What a lift does is restore the structure toward level and, more importantly, transfer its weight onto piers that reach past the zone of seasonal moisture change.

Realistic expectations should be written into the proposal: how much lift is being attempted, at which points, and what cosmetic consequences are anticipated. A contractor who promises a perfectly level floor and no new cracking is overselling.

Your written scope should specify

• Pier count and exact locations shown on a plan of the house
• Pier type and the criterion used to stop driving each one
• How much lift is targeted at each point, based on the elevation survey
• Whether interior piers require breaking and repouring floor sections, and how those are finished
• Plumbing considerations — lifting a slab stresses supply and drain lines, and a post-repair hydrostatic test is a reasonable request
• Landscape and hardscape restoration
• Warranty terms, exclusions and transferability
• Which jurisdiction the permit is pulled in and who pulls it

What a pier job looks like day by day

Before anyone digs

Utilities are located and marked. This matters more than it sounds, because exterior pier locations sit right where gas, water, electrical and irrigation lines commonly run parallel to a foundation. Interior locations have to account for plumbing under the slab.

Excavation

A hole is opened at each pier location down to the bottom of the foundation beam, roughly two to three feet across. On exterior locations this means removing landscaping, and on interior locations it means cutting and removing a section of floor covering and slab. Anything you want preserved — a shrub, a piece of stone edging, a section of decorative concrete — should be discussed before the crew arrives, not after.

Driving

The hydraulic ram is set against the underside of the beam and pier segments are pressed down one after another. The operator watches pressure. When resistance reaches the specified figure and holds, that pier is considered to have reached bearing. On a Gregg County lot, the depth this occurs at can vary substantially from one side of a house to the other, because the clay and weathered material below is not a flat uniform layer.

Lifting

Once all piers on a section are placed, they are loaded simultaneously and the house is raised in small increments while someone monitors the interior. Doors are checked, existing cracks are watched, and the elevation readings are re-taken as the lift progresses. This is where an experienced crew earns their money, because lifting too far or too fast on one point does more damage than the settlement did.

Locking off and backfilling

The piers are shimmed to hold the achieved elevation, the load is transferred off the jacks, holes are backfilled and compacted, and interior slab sections are repoured. Backfill compaction is worth watching — loosely dumped soil in a pier hole against a foundation creates a preferential path for surface water straight down to the beam, which is the opposite of what you want in this climate.

Perimeter piers, interior piers and why the count varies so much

Most residential slab repair places piers around the perimeter beam at a spacing determined by the beam's ability to span between them — commonly six to ten feet, tighter under heavy loads like a masonry fireplace or a two-story section.

Interior piers are a different decision. They require breaking the floor, which means the work happens inside your house and the finishes have to be dealt with. They are used when the elevation survey shows the interior has dropped independently of the perimeter — the dish pattern — rather than as a default.

This is the single biggest reason two proposals for the same house differ so widely. One company perimeters the whole house at tight spacing; another piers only the section the survey shows has moved. Ask each of them to justify the count against the readings, and ask what would happen if you did fewer.

Plumbing: the step people skip and regret

A slab has water supply lines and drain lines running through and beneath it. When you lift a slab, those lines move with it, and cast iron drain lines in older houses are brittle. A leak under a slab is also itself a cause of foundation movement, because it introduces a continuous water source into the subgrade — which in a sand-over-clay profile will migrate laterally and produce exactly the localized swelling you are trying to eliminate.

Two tests are worth knowing about. A static test isolates the drain system and holds water in it to see whether the level drops. A hydrostatic test does the same under specified conditions. Running one before the lift tells you whether a leak is contributing to the problem. Running one after tells you whether the lift broke something. Both are reasonable requests and some contractors include them; if yours does not, ask what it costs to add.

In Texas, the plumbing portion of any repair has to be performed by a plumber licensed through the Texas State Board of Plumbing Examiners, regardless of who is doing the foundation work.

Voids under the slab

When soil beneath the middle of a slab shrinks away, the slab does not always follow it down — it can bridge, leaving a gap. After a lift, gaps can also open where the slab has been raised off soil that stayed put. Those voids are usually filled by pumping grout through small holes, which supports the slab and, importantly, prevents them becoming reservoirs for water moving laterally through the sand layer.

Void filling is not always necessary and is sometimes sold when it is not. Ask what evidence there is that a void exists before agreeing to fill one.

Decoding the warranty

• What is covered. Usually the piers placed and the specific area worked on. Almost never the rest of the house.
• What triggers it. Typically further settlement at a repaired point beyond a stated tolerance. Find out what that tolerance is.
• What voids it. Commonly includes failure to maintain drainage or watering around the foundation, which is a real obligation you are taking on.
• Whether it transfers. Matters enormously at resale. Some transfer freely, some for a fee, some not at all.
• Who backs it. A warranty from a company is worth what that company is worth in ten years. Ask whether it is backed by anything beyond the business itself.

Why the edge of a slab moves before the middle

Almost all slab movement in this region starts at the perimeter, and understanding why explains a great deal about both diagnosis and repair.

The soil directly beneath the centre of a slab is unusually well protected. It is covered by concrete, so rainfall does not reach it. It is shaded from sun and wind, so evaporation is minimal. Over years it settles into a stable moisture content and largely stays there, changing very slowly if at all.

The soil at the perimeter has no such protection. It receives rainfall directly, including everything the roof delivers. It dries in the sun. It loses moisture to evaporation along the exposed slab edge, and it is where tree roots concentrate, because that is where the water is. In a county receiving close to fifty inches of rain a year with a pronounced spring peak followed by a hot dry late summer, the perimeter soil goes through a large annual swing while the interior soil barely moves.

That differential is the engine. The house is bearing on ground that changes volume at the edges and holds steady in the middle, and a rigid concrete plate cannot accommodate that indefinitely. It is also why the dome-shaped elevation pattern, with a relatively high centre and low edges, is so common on older slabs here, and why the distress shows up first at exterior wall openings rather than in the middle of the house.

The practical consequence is that perimeter conditions deserve most of the attention. Roof water, grading, the width of any paving against the house and the position of large trees all act on precisely the band of soil that is doing the moving. Stabilising that band addresses the mechanism rather than the symptom.

What your property looks like during and after the work

Slab pier work is disruptive in ways that are entirely normal and still worth being told about in advance.

Exterior pier locations require a hole at each point large enough to work in, which means beds, shrubs, edging and turf in those areas come out. Spoil from the excavation is stacked on site during the work. Equipment needs a route to the work area, and on a fenced lot that sometimes means removing a section of fence. Concrete removed from interior locations has to be broken, carried out and hauled away.

Afterward, holes are backfilled and compacted, interior slab sections are repoured, and the ground is generally left rough rather than restored to its previous appearance. Turf takes a season to recover. Backfilled soil settles further over the following months and usually needs topping up, which is worth planning for rather than treating as a defect.

What is worth agreeing in writing beforehand is who restores what. Whether shrubs are preserved and replanted or simply removed, whether turf is replaced or left to recover, whether spoil is hauled off or spread on the property, and whether the finished concrete inside the house is left ready for your flooring or matched to it. These are ordinary items that become disputes when nobody wrote them down.

Related services

Available across Gregg County and nearby

See all service areas →