A repaired foundation never moves again, and other myths I correct every week

The honest answer about never moving again

No. A properly repaired foundation should stay stable where it was supported, but no honest company promises the house will never move again. Piers hold the sections of slab they sit under. The clay under the rest of the house still swells and shrinks with the weather, and a new leak, a drainage change or a big tree can start movement somewhere the piers are not. Even our own lifetime warranty states that it does not guarantee no future work will be needed.

I evaluate foundations for FCS Foundation & Concrete, and this belief is the one I correct most often, usually with homeowners who bought a house with a past repair and are surprised by a new crack. A written warranty is a good place to see what a repair really promises, so I start there.

A written foundation warranty is a specific promise, and it is worth reading what it says rather than what the word lifetime suggests. Ours covers pressed pilings and states its goal in numbers: to stabilize the repaired portion of the foundation to within one part in 240, which is about 1 inch in 20 feet. That is a tolerance, not perfection. Houses on clay were never perfectly level, even when new.

The warranty also lists conditions that void it, and they are a useful map of what moves a repaired house. Plumbing leaks that undermine the foundation, erosion, a pool or underground structure built too close, another company altering the piers, a story added without approval, and a house that is not reasonably maintained, including improper or uncontrolled watering, gutters and drainage. Each of those is a way to start new movement. I explain how to stay on the right side of them in what to do after foundation repair.

Myth: every crack means the foundation is failing

Most houses here have cracks. Concrete shrinks as it cures, drywall seams open with humidity, and houses on clay move a little every year. Plenty of the hairline cracks I look at are cosmetic or seasonal, and I say so. What matters is the pattern: cracks that keep growing, stair-step cracks in brick wider than a quarter inch, several signs clustered on one side of the house, and floors you can feel sloping. Our Dallas page suggests booking an inspection when two or more warning signs appear.

If you are trying to decide which kind of crack you have, my guide to stair-step cracks and sticking doors walks through the signs and a simple inspection you can do yourself.

Myth: homeowners insurance will cover it

Usually it will not. The Texas Department of Insurance notes that companies will not pay for damage that happens over time, and settling from clay soil is that kind of slow movement. Standard policies typically exclude it. The exception worth knowing about is damage caused by a plumbing leak, which some Texas policies may cover through a specific endorsement, depending on the wording.

So the cause matters for more than the repair plan. If a leak may be involved, call your agent before work starts and ask what the policy requires. This is general information, not insurance advice, and only your policy and your carrier can answer the question for your house.

The practical lesson is to establish the cause before you file anything or sign a repair contract. A plumbing test that documents an under-slab leak, with dates, is the kind of record a claim depends on. A claim built on a guess, either way, tends to go badly for everyone.

Myth: piers fix every kind of movement

Piers lift and support a slab that has dropped. They cannot push down a slab that is being lifted. When clay under the middle of a house swells, usually because of an under-slab plumbing leak, poor drainage or heavy irrigation on one side, the floor heaves upward. Our own page on heaving says it directly: piers alone cannot push a slab back down against expanding soil. The water source has to be stopped first.

When piers go in under a heave, the result is predictable. The floor keeps rising in the middle, the piers hold the edges, and the slab is stressed between them. The fix was a plumbing repair and time, and the piers were money spent in the wrong place. That is why, when the elevations show a high center rather than low edges, I want the plumbing tested before anyone talks about piers.

Myth: the cheapest bid and the biggest bid are both safe bets

Homeowners tend to assume one of two things: that all foundation companies do roughly the same work, so the lowest price wins, or that the bid with the most piers must be the most thorough. Neither holds up. Our pricing page warns that unusually low quotes may under-pier a home, which leaves sections unsupported and invites a second repair. A bid padded with piers the readings do not justify just costs more.

The right number of piers comes from the elevation survey. Ask every company to show you its readings and explain why each pier sits where it does. The cost side of this is covered in detail in what foundation repair costs in Dallas.

Myth: if the cracks close in winter, the problem is gone

This one is seasonal. A crack that opens in a dry August and closes after fall rains is a house moving with the clay. The movement has not stopped; it has reversed for a few months. Cracks that cycle like that are worth watching, and the watching should include marking the ends with a pencil and dating them so you can tell whether the cycle is getting bigger each year.

The opposite mistake is just as common: waiting for rain to fix a drought crack. Steady moisture around the house helps, but a wet spell does not lift a slab that has settled. What you can do with water and drainage, and where it stops working, is in my guide to watering and drainage you can handle yourself.

Myth: cut down the tree and the problem goes away

A large tree close to the house can draw moisture out of the clay on one side, and that drying can drop the slab edge nearest the tree. So the instinct to remove the tree makes sense. The catch is what happens next. Our heaving page lists removing a large tree as one of the causes of heave: the soil the tree kept dry slowly re-wets and swells, and that can push the slab up over the following years.

That does not mean every tree should stay. It means the decision deserves a measurement first and a plan for the soil afterward. Steady, even watering around the house and good drainage matter more after a big tree comes out, not less. If a tree is already gone and the floor near that side has started to rise, tell your evaluator when it was removed.

Myth: a foundation repair makes a house hard to sell

A known foundation problem that has not been addressed is what tends to complicate a sale. Buyers' inspectors find it, lenders ask about it, and the negotiation turns on an unknown. A repair that has been documented is a different conversation. When a seller can hand over the final elevations, the scope of work and a warranty that transfers to the new owner, the buyer has answers instead of questions.

That is why I tell sellers and buyers to keep every page of foundation paperwork and to follow the warranty's transfer steps on time. Ours transfers to each new owner, with no limit on the number of transfers, as long as the transfer is requested in writing within 30 days after the title changes hands.

Myth: foundation work turns the house upside down for weeks

People picture a house jacked up on blocks with the family in a hotel. A typical slab repair is far less dramatic. Our average job takes two to three days, most of the work happens outside along the foundation, and families usually stay home throughout. Interior piers are more disruptive in the rooms where they go, because flooring has to be lifted and the slab opened, but even then the rest of the house stays livable.

The longer timeline is the one after the crew leaves. A lifted house keeps adjusting for weeks, which is why cosmetic repairs wait 8 to 12 weeks. Plan for that patience rather than for weeks of construction.

Myth: patch the cracks first, then call someone

Filling cracks and repainting before anyone has measured feels like progress, but it erases the evidence an evaluator reads. Crack width, direction and pattern tell me where a house moved and how much. Leave them alone until after the evaluation. After a repair, our FAQ recommends waiting 8 to 12 weeks before cosmetic work so the structure can settle into its new position.

If any of these myths sounded familiar, a measurement is the quickest way to replace belief with facts. Our evaluation is free and carries no obligation. I take an elevation survey, explain what the readings show, and if repair is warranted, you get a written, itemized estimate on the spot or within 24 hours. If it is not, I will tell you that in writing.

Bring the questions you have, including the ones that came from a neighbor, an inspector or a previous estimate. Most of the myths in this guide fall apart once the readings are on the table, and the ones that hold up tell you exactly what your house needs.

Questions people ask me