Concrete removal in Katy for cracked driveways, patios, walks and slabs

Why concrete fails on west Houston clay

The soil across Katy and the rest of the west side is mostly expansive clay. In a dry stretch it pulls away from the bottom of a slab and leaves hollow spots; after heavy rain it swells and pushes back up. A driveway on that ground moves every season until the movement opens a crack. Flat lots make it worse, because water sits against the edges and softens the clay right where the concrete needs support.

Roots are the second big cause; a thick oak root can raise one panel well above the next. The third is a weak base, often a thin layer of sand over raw clay that has washed out through the joints over the years. When a slab is cracked into several pieces, has sunk or lifted at the joints, or slopes water back toward the garage, removal and a fresh pour usually make more sense than another round of patching.

What concrete removal usually covers

Most calls are about flatwork, though the same equipment handles more. Common pieces include:

• Driveways, from a short two-car pad to a long run back to a detached garage, along with the approach where it meets the street
• Back patios and the slab under an old covered porch or pergola
• Front walks, side walks along the house and the paths that lead to a gate
• Stand-alone slabs: an old shed pad, a basketball court, a dog run, a slab left behind by a carport or an equipment pad
• Front steps, stoops and small landings poured against the house
• Footings and piers buried in the yard from old posts, clotheslines, carports or play sets
• Curbing and mow strips around beds that have cracked and shifted

Thickness and steel decide most of the effort

Two slabs that look alike from above can take very different amounts of work. A thin, unreinforced walkway breaks into manageable chunks with a few passes of a breaker. A thick driveway with turned-down edges and a tight grid of rebar fights back the whole way. The contractor learns what is inside from a broken edge, a small test cut, or knowing how that subdivision was built.

Reinforcement comes in a few forms. Welded wire mesh is a flat grid of light wire that holds cracked pieces together; it is easy to cut but tangles in the rubble. Rebar is heavier bar that has to be sheared or torched where the slab is broken. Some newer flatwork uses fibers mixed into the concrete, which adds toughness without any steel to separate. Each one changes how the pieces break and where they can go afterward.

Saw cutting a clean edge for partial removal

Not every job means taking all of it. Often only the panels near the garage have sunk, or a patio extension needs to come out while the original slab stays. In that case the line between keep and remove is cut first with a concrete saw. A full-depth saw cut gives a straight, square edge for the new pour to butt against, and it stops the breaking from spreading cracks into concrete that was supposed to survive.

Saw cutting is wet, loud work; water cools the blade and holds down silica dust. Where new concrete will tie into old, the person pouring may want steel dowels drilled into the cut face. Where a driveway meets a public sidewalk or the street, the cut is often set at an existing joint, since the city may have a say about the approach.

How the breaking is done

The method depends on the amount, the thickness and how close the slab sits to the house or a neighbor. A typical removal runs like this:

1. Locate what is buried. A call to Texas811 gets the public utility lines marked; private lines such as sprinkler pipe, landscape lighting, a gas line to a grill or a buried feed to a detached building are found by asking the owner and looking around.
2. Cut the edges that have to stay clean, including any line along the house, the garage slab or a section that is being kept.
3. Break the slab. Small or tight jobs get a handheld breaker or jackhammer. Larger areas get a hydraulic breaker mounted on a skid steer or a mini excavator, which shatters the concrete in a grid pattern into pieces a machine can lift.
4. Pry and lift. A bucket or grapple works under the broken pieces and lifts them free, with workers cutting mesh or rebar where it still ties pieces together.
5. Load out. Rubble goes into a dump truck or a roll-off container parked where it will not crush the lawn or block the street longer than needed.
6. Clean up the subgrade, rake out leftover fragments and leave the ground in the condition agreed on in the proposal.

Protecting the house, the yard and everything that stays

The riskiest edge on any removal is the one against the house. Driveways and patios often butt right up to the foundation or the brick ledge, and hammering hard at that joint can chip the slab edge or crack brick. A careful contractor saw cuts that line, breaks the last strip by hand or with a light breaker, and leaves the foundation face alone. The same care applies at the garage door, where the driveway meets the garage slab.

Out in the yard, loaded trucks and track machines rut wet clay fast, so the haul path is planned before anything breaks and mats go down on soft days. Sprinkler pipe near the slab edge almost always takes some damage and is worth discussing up front. If a valued tree has roots under the driveway, an arborist's opinion before work starts is cheap compared with losing it. Chips can fly a surprising distance, so windows and parked cars get covered too.

Steps, stoops and buried footings

Front steps and stoops look minor but often take more thought than a large patio. They are poured against the house, sometimes filled with rubble and sometimes pinned to the foundation with steel, so they have to be separated without harming the slab edge, the brick or the threshold.

Footings are the hidden half of the job. An old carport, a pergola, a swing set or a long-gone mailbox may have left a block of concrete well below the grass. These come out with a mini excavator or by hand, and the hole is filled and tamped so it does not settle into a soft spot later. If a larger structure is coming down with its slab, such as a detached garage or shed, that work is covered on the garage and shed demolition page.

Where the broken concrete goes

Clean concrete is one of the easiest demolition materials to recycle. Around the Houston area, crushing yards take broken slabs, run them through a crusher, pull out the steel with magnets, and sell the result as crushed concrete base for roads, pads and driveways. Rebar and mesh that come out on site are bundled and sent to a scrap metal buyer. Rubble that is mixed with dirt, wood, asphalt or trash is harder to place and may have to go to a landfill or transfer station instead.

So sorting matters even on a small job. Weight matters too: a truck hauling broken slab fills by weight long before it fills by volume, and the number of loads is one of the clearest drivers of the final price.

The base under the slab

Once the concrete is gone, the ground underneath shows why it failed: a sand cushion washed into voids, wet gray clay that pumps under foot, spreading roots, an old layer of gravel or shell, and now and then an earlier slab buried beneath the one just removed.

For a new driveway, the replacement contractor usually wants soft material dug out, the subgrade shaped to drain away from the house, and fresh base placed and compacted. For a yard going back to grass, topsoil and a level grade are what count. Settle who does this preparation before work begins; a blurry line here is how an owner ends up with an open dirt patch and nobody scheduled to finish it.

Getting ready for the new driveway or patio

Removal and replacement work best as one plan, even when two different companies do them. Bare clay left open during a week of summer thunderstorms turns to mud, softens and has to be dried or dug out again before anyone can pour. Coordinating dates so the forms go in soon after the old slab comes out protects the base and keeps the lot usable.

Homeowner associations in many Katy subdivisions have rules about driveway width, finish and color, and some want plans approved first. Settle any new layout before demolition so the cuts land in the right place. If an old pool and its deck are part of the picture, see the pool removal page.

Cost drivers and what a solid proposal spells out

Every concrete job is priced after the contractor sees it, because the numbers that matter cannot be read from a photo. The things that move the price most are:

• Total area and thickness, which together set how much material has to be broken and hauled
• Reinforcement: no steel, wire mesh, rebar or fibers, and how densely it was placed
• Access for equipment, including gate width, side-yard clearance, overhead lines and how far the haul path runs
• How much of the edge sits against the house, the garage or concrete that is staying, and how much saw cutting that requires
• Disposal: whether the rubble is clean enough to go to a crushing yard and how many truckloads it makes
• Base work after removal, such as digging out soft clay, grading and placing new base
• Repairs to sprinklers, sod and anything else the removal disturbs, and whether those are included

Concrete removal in Katy for cracked driveways — common questions

Related work

Across the metro