Foundation repair across Texas, explained before you are sold anything.

Because of the soil, not the construction. Much of populated Texas sits on expansive clay — soil that physically changes volume as its moisture content changes. The Houston Black series of the Blackland Prairie, the Texas state soil, is documented by USDA-NRCS at a plasticity index of 40 to 60. Building codes classify soil as expansive at a plasticity index of 15. Soil surveys record cracks up to four inches wide and six feet deep opening in that clay during extended dry weather.

A house built correctly on stable soil in another state would move here too. The foundation is not failing so much as the ground underneath it is changing shape.

No, and this is where most homeowners are misled. Concrete shrinks as it cures, and fine hairline cracks appearing in the first year or two are usually shrinkage rather than movement. What matters is the pattern and the behaviour: cracks wider than about a quarter inch, cracks that run in a stair-step through brick mortar joints, cracks that are wider at one end, and cracks that measurably change over a season. A crack alone is a symptom. Reading foundation cracks properly is what separates a cosmetic repair from a structural one.

It depends on what you need. A foundation contractor will evaluate and quote a repair. A licensed professional engineer works for you rather than for the repair, and will tell you whether a repair is warranted at all. Engineers typically charge for a report; many contractors evaluate at no cost.

If you have been given a large quote, if you are buying the house, or if two contractors disagree, an independent engineer's report is usually worth what it costs. For a first look at whether anything is actually wrong, a contractor foundation evaluation is a reasonable starting point.

Nobody can answer this honestly without seeing the house, and you should be wary of anyone who tries. Published industry estimates give a range: G.L. Hunt puts pier installation at roughly $1,000 to $3,000 per pier; Thomas Engineering, a Texas professional engineering firm, estimates $8,000 to $25,000 for slab repairs and $6,000 to $15,000 for pier and beam work on a typical home; LevelUp CS quotes $4,000 to $12,000 for slab repair in the DFW area.

Those are third-party figures published by other companies, not quotes from us. The number that matters is the one a contractor gives you after measuring your house. See what actually drives the cost below.

Usually not. Standard Texas homeowners policies generally exclude settlement and earth movement, which is the cause of the large majority of foundation damage in this state. Some policies do cover damage resulting from a sudden plumbing leak beneath the slab, which is a different thing and worth investigating, because an undetected under-slab leak is a common trigger for localised settlement.

Read your own policy rather than relying on what a contractor tells you about it.

It can, and this is the cost most homeowners do not budget for. Supply and drain lines run beneath a slab. When a house is lifted, those lines move with it, and lines already strained by years of settlement can fail. Thomas Engineering notes that under-slab plumbing repairs can equal or exceed the cost of the foundation work itself.

A pre-repair and post-repair hydrostatic plumbing test is a reasonable thing to ask about. It will not prevent a problem, but it establishes what condition the lines were in beforehand.

For a typical residential underpinning job, the physical work is often measured in days rather than weeks, though access, the number of piers and whether tunnelling is required all change that. Interior work through the slab is slower and more disruptive than perimeter work.

The contractor assigned to your call is the only one who can give you a schedule, and that schedule depends on their current workload as well as your house.

Many contractors offer warranties on piers, and some are transferable to a future owner, which matters at resale. Warranties vary a great deal in what they actually promise — whether they cover only the piers installed, whether they cover further movement elsewhere on the house, and what voids them.

Ask for the warranty in writing before work begins and read the exclusions. We do not issue warranties; any warranty is between you and the contractor who performs the work.

Yes, and consistency matters more than volume. The damaging condition is uneven moisture — one elevation saturated while another has dried and shrunk — because the wet side heaves while the dry side settles. The Foundation Performance Association, which publishes foundation maintenance guidance for Texas clay, calls for watering at least a foot out from the wall. Closer than about six inches and the water pools against the beam instead of soaking the soil that carries the load; beyond roughly 24 inches it may never reach that soil at all.

The City of Denton publishes its own homeowner guidance on this. Our drainage and moisture page covers the practice in more detail.

An unrepaired one hurts it more. Foundation movement shows up in a buyer's inspection whether or not it has been disclosed, and at that point it is a negotiating lever against you. A documented repair with a transferable warranty and an engineer's letter is a far easier conversation than visible cracks and no paperwork.

Keep every document: the elevation survey, the scope of work, the warranty, and any engineer's report.