Settlement, heave and lateral pressure look alike in drywall and are corrected in different directions. Pick the movement first, then the method.
3 movementsdown, up and sidewaysAn elevation survey and an independent engineer decide the method. A company that only sells piers will tend to find that you need piers.
This selector matches the movement you have evidence for to the repair approach that addresses it. Settlement is a support question after water is fixed. Heave is usually moisture and expansive clay, not a missing pier.
Lateral pressure on a basement wall calls for wall stabilization. It does not set a pier count, depth or product, and it cannot tell you which movement you have.
Movement, then water
Method follows movement. Water first. Not a specification. Nothing is emailed.
—Method conversation
—Wrong if
—Water
—What this page will not do
What this assumed—
Method follows movement. Drainage-first is not a product. An engineer who does not sell the work sets the scope. HyreFoundation does not design repairs.
The mechanism
Three movements, three directions, one product on the truck
Everything on this page follows from one observation: the damage a homeowner can see is nearly identical across three completely different mechanisms, and the correction for each points a different way.
Settlement is downward. Part of the structure has gone down relative to the rest — soil consolidating, a poorly compacted fill, clay shrinking as it dries out, sometimes a tree drawing water from under one corner.
The correction transfers load to something that will not move: piers, piles, underpinning. This is the one movement piers are designed for.
Heave is upward. The ground has swollen and pushed part of the building up. In expansive clay this is a moisture event, not a load event.
The Colorado Geological Survey states that such soils can "expand up to 20% by volume when exposed to water" and exert "Expansive soils can exert a force of up to 30,000 pounds-per-square-foot".
The correction is about moisture and about isolating the structure from the swelling soil.
Adding piers to a heaving slab addresses nothing, and can make the differential worse by pinning one part of a building that the ground is still lifting elsewhere.
Lateral is sideways. Soil outside a below-grade wall is pushing in, usually because it is wet and heavy. The correction resists a horizontal load — anchors, braces, carbon fiber straps, reduced backfill pressure, and above all drainage. Vertical support has no bearing on it whatsoever.
Our analysis — why this is the expensive confusion. Three mechanisms, three directions, and one shared symptom set: cracks, sticking doors, sloping floors. A homeowner cannot distinguish them from the inside, and neither can a web form.
What distinguishes them is measurement — relative floor elevations across the whole building, drawn on a floor plan — plus knowing where the water goes and what the soil is. That is a survey and an investigation, not a walkthrough.
And why the market gets it wrong so reliably. Most repair companies install one family of product. That is not a scandal; specialization is normal and often produces better workmanship.
It becomes a problem only at the diagnostic step, because a company that installs piers has no commercial route to the conclusion "this is heave, and what you need is a plumber to find the leak under your slab and a change to your irrigation".
The diagnosis and the product should not come from the same invoice.
The map
Which method addresses which movement — and what each one leaves untouched
The last column is the point. Every method here is legitimate for something. Each is also routinely sold for a movement it does not address at all.
Method
The movement it actually addresses
How it works
What it does NOT address
Piers / piles / underpinning
Settlement — downward movement.
Transfers building load past the problem soil to a deeper stratum or to refusal, then either stabilizes at current position or lifts back toward level.
Heave and lateral pressure entirely. Piers resist downward load; they are not a tie-down and not a retaining system. Nor do they change the moisture regime that caused the settlement, which is why a pier job with no drainage work attached often gets a sequel.
Wall anchors, braces, carbon fiber
Lateral pressure — horizontal movement of a below-grade wall.
Resists or arrests inward movement, either by tying the wall back to undisturbed soil beyond the failure zone, by bracing it against the floor structure, or by adding tensile capacity to the wall itself.
Vertical settlement. And critically, none of them reduce the load — they resist it. The load is largely water in the backfill, which is why drainage belongs in the same conversation and often should come first.
Drainage: gutters, grade, downspout extensions
The moisture driver behind heave, behind clay-shrinkage settlement, and behind lateral pressure. All three.
Stops delivering water to the soil next to the building, and stops the wet-dry cycling that drives expansive clay.
Movement that has already happened. It changes the future, not the past. It also cannot fix a leaking supply or waste line under the slab — that is a plumbing investigation.
Foundation drain (perimeter / footing drain)
Hydrostatic pressure against a below-grade wall, and the water table at the footing.
IRC R405 requires one around below-grade walls enclosing usable space, with the gravel extending "The gravel or crushed stone is to extend not less than 1 foot beyond the outside edge of the footing and 6 inches above the top of the footing, placed on not less than 2 inches of washed gravel and covered with not less than 6 inches of the same material."
Surface water arriving from a downspout six feet away, which will overwhelm it. And it does nothing without somewhere to discharge — a drain with no outfall and no sump is a trench.
Dampproofing / waterproofing coatings
Water and vapor moving through the wall material.
Dampproofing resists moisture and vapor. It is the baseline requirement for below-grade walls enclosing usable space. Waterproofing resists liquid water and bridges cracks and joints, and is required instead of dampproofing where a high water table or other severe soil or water conditions are known to exist.
Structural movement of any kind, and the pressure itself. A membrane resists water; it does not relieve the head pushing on it. This is why the code pairs it with drainage rather than treating them as alternatives.
Slab jacking / polyurethane injection
A settled slab that has separated from the soil beneath it — a walkway, a garage floor, a patio.
Fills the void and re-levels the slab by injecting grout or expanding foam beneath it.
Anything to do with the structure the slab sits next to. Re-leveling a driveway is a cosmetic and trip-hazard fix; it is not foundation repair and should not be priced as though it were.
Crawl space encapsulation
Ground moisture evaporating into the crawl space and, from there, into the house.
Ventilation openings are not required where the exposed earth is covered with a continuous Class I vapor retarder and one of the listed conditioning methods is provided. One listed conditioning method is "One listed method is continuously operated mechanical exhaust ventilation at a rate of 1 cubic foot per minute for each 50 square feet of crawl space floor area."
Standing water, which is a drainage problem that must be solved first — a liner over a puddle is a pond with a lid. And it does not correct any structural movement.
Our analysis, with the code requirements quoted where they apply. The IRC is a model code. It has force only in the edition your jurisdiction adopted, with the local amendments that jurisdiction made.
Foundation chapters get amended more than most, because frost depth and soil are local facts. Confirm with your building department before relying on any figure here.
The sequence
Why water comes first, even when the crack is what you noticed
Not because water is cheaper to fix — though it is — but because in two of the three movements water is the cause, and in the third it is the load.
Illustrative — relative magnitude only. The reason repair conversations keep coming back to water is visible in the ratio.Colorado Geological Survey (clay swell range); National Ready Mixed Concrete Association (concrete shrinkage specification limit)
Source fact. Colorado Geological Survey on the scale of it: "Annual losses are regularly estimated to be greater that those of tornadoes, floods, earthquakes, and hurricanes combined" And on what to do about it, the recommendation is to "consult a competent, professional soil engineer and engineering geologist" — a soil engineer, not a product.
Source fact. IRC R405 requires foundation drains around below-grade walls enclosing usable space, and exempts them in exactly one circumstance: "A drainage system is not required where the foundation is installed on well-drained ground or sand-gravel mixture soils according to the Unified Soil Classification System, Group I soils."
The exemption is granted for good drainage. That tells you what the requirement is for.
Our analysis. Expansive clay does not care how good the concrete is. It is a moisture problem expressed as a structural one, which is why the cheap interventions — gutters, downspout extensions, grade away from the wall, consistent watering rather than drought-then-flood — are not a consolation prize. They are the mechanism.
The cycling matters more than the wetness. Expansive clay damages buildings through repeated swell and shrink, not through being permanently wet.
A soil that stays at a consistent moisture content is far less destructive than one that soaks every storm and bakes every August.
This is why the advice sounds so odd — watering the foundation perimeter during drought is a real intervention in some regions, and it is the opposite of what "keep water away from the house" suggests.
Which one applies to you is a local question for a local engineer.
The leak nobody looks for. A slow supply or waste leak under a slab delivers water to one spot, continuously, for years.
It produces movement that looks exactly like soil settlement and it will defeat any structural repair placed on top of it.
Before authorizing work on a slab-on-grade house with localized movement, a static plumbing test is cheap and it is the question a pier company has no reason to ask.
Recommendation. Walk the outside before you price anything: gutters clear and discharging well away, downspouts extended rather than dumping at a corner, grade falling away from the wall, irrigation not soaking one elevation, no unexplained wet patch.
The water intrusion diagnostic walks it as questions. None of it is glamorous and none of it is sold, because there is almost no margin in it.
The conflict of interest
Separate the diagnosis from the product, the way the law already does
A state engineering board has already drawn this line, in writing, for exactly this situation. It is the most useful document in the trade.
What the Texas board said
In Engineering Advisory Opinion Request 43 (February 2018), the Texas Board of Professional Engineers held: "Analyzing the cause of a condition, recommendations for repair, or providing any other expert engineering opinion associated with a foundation … would be considered the practice of engineering."
Analyzing the cause. Recommending the repair. Any expert opinion on the foundation system. All three are, in Texas, the practice of engineering.
What that means for the free inspection
Our analysis. A home inspector flags a symptom, and that is a good job. Naming the cause and specifying the repair is engineering.
So when a free inspection hands you a diagnosis and a pier count on one visit, ask who signed it.
This is Texas law; every state regulates engineering, so check the wording in yours.
So the question to ask, politely and early: is this document an engineering opinion, and if so, who is the licensed engineer of record?
Some companies employ or retain one and will show you the seal — that is a good answer.
Some will say it is a proposal based on visible conditions — also an honest answer, and it tells you the diagnosis is still missing.
What an independent engineer actually gives you
A written report naming the movement and its direction, an elevation survey showing relative floor heights across the building, an opinion on cause, and a specified scope — how many of what, where, to what depth or capacity, with what acceptance criteria.
That scope is what turns three bids into a comparison. Three bids against three self-diagnoses are three different jobs with three different prices, and comparing the totals is meaningless. Three bids against one scope is a price comparison.
And the incentive is clean. Not because engineers are better people, but because the fee is the whole relationship.
An engineer you pay directly is finished when the report is delivered, and earns exactly the same whether the scope runs to eighteen piers or to "monitor for twelve months and fix your downspouts". Nobody else in this transaction has that property.
Texas law, cited as Texas law. Every state regulates engineering practice and most draw a comparable line, but wording and exemptions differ — check your own state board. Not legal advice.
Order of operations
The sequence that keeps you from buying the wrong repair
Doing these out of order is the single most expensive mistake available in this subject, and it is the order the market pushes you away from.
1
Establish that something is moving, not just that something is cracked
Dated photographs, marked crack ends, and if you can, repeated relative height readings. The elevation log holds two readings and the months between them. A crack is not evidence of movement; a change is.
2
Investigate water — outside, and under the slab
Grade, gutters, downspouts, irrigation, and for a slab-on-grade house with localized movement, a static plumbing test. This step is cheap, and it is the one most likely to change what gets built.
3
Get the direction of movement measured, by someone who sells nothing
A licensed structural or geotechnical engineer, with an elevation survey. Settlement, heave or lateral — that answer determines everything downstream, and no dropdown, photograph or free walkthrough can supply it.
4
Get the scope written before you get prices
Method, count, locations, depth or capacity, what happens to the water, and what "done" means. A scope is a document you can hand to three companies unchanged.
5
Then bid it — three companies, one scope
The cost calculator runs your own rates against a scope you already have. It does not invent a scope and it will not produce a national average, because we hold no dataset of foundation jobs and will not print one.
6
Fix the water as part of the job, not instead of it or after it
If the drainage line items are missing from every bid, the same mechanism is still running the day the crew leaves. Ask for them explicitly and priced separately, so you can see them.
7
Keep monitoring afterwards
The same photographs, the same benchmarks, the same intervals. The warranty conversation two years from now is a documentation conversation, and post-repair readings are the half of the file most people never collect.
The document
What a good foundation quote contains
Six things present, two things absent. Everything here is checkable by reading, before anyone digs.
A named movement and a stated cause
Settlement, heave or lateral — in writing, with the evidence. Not "foundation issues". If the document cannot name the direction the building moved, it cannot justify a method.
An elevation survey attached, or referenced
Relative floor heights across the building. It is the closest thing to objective data in this trade and it is what any later dispute will turn on.
Count, locations and depth or capacity
"Fourteen piers" is not a scope. Fourteen piers, at marked locations, driven to refusal or to a stated capacity, with a stated method, is. Depth is the variable that moves the price most and the one most often left open.
What happens to the water, as a priced line item
Drainage, grade, downspouts, sump and outfall. Priced separately so you can see it. Its absence is the single most informative gap in a foundation proposal.
A definition of success, and what is not being promised
Lift toward level is not lift to level, and an honest proposal says so. Recovery is partial, and forcing it damages plaster, tile and plumbing. A promise of perfect level is optimistic or not yet fully priced.
A warranty you have read to the end, including the transfer clause
What is covered, what is excluded, what voids it, who honors it if the company is sold, and whether it transfers when you sell. Many charge a transfer fee; some do not transfer at all.
A diagnosis and a price from the same visit, at no charge
Not necessarily dishonest, and often perfectly competent. But it is the arrangement in which the person naming the size of the problem is paid according to the answer, and in Texas at least the naming part is regulated activity. Ask who signed it.
"This price is good today only"
The FTC’s standing home-improvement advice is to get it in writing and get more than one bid. A price that expires when the salesperson leaves the room is a fact about the sales process.
Vocabulary
Method words, defined honestly
Including the ones that are brand names dressed as engineering terms.
Underpinning
The general term for extending or transferring a foundation’s support to more competent material. Piers and piles are underpinning methods; the word is the category, not a product.
Push pier (resistance pier)
Steel sections driven to refusal using the weight of the building as the reaction. The building itself provides the force, which means capacity is related to what the structure above can bear on.
Helical pier
A screw-shaped shaft turned into the ground with measured torque, from which capacity is estimated. Does not need building weight to install, so it is used where a push pier cannot get reaction — light structures, new construction, additions.
Drilled pier / bell-bottom pier
A concrete shaft cast in a bored hole, sometimes with a widened base. Common in some regions and rare in others; regional practice here is real engineering practice, not fashion.
Refusal
The point at which a driven element will advance no further under the applied force. It is a driving criterion, not a guarantee of bearing stratum, and what counts as refusal should be defined in the specification rather than decided on the day.
Lift versus stabilize
Two different objectives with two different prices and two different risks. Stabilizing arrests further movement; lifting attempts to recover elevation and can crack finishes, tile and pipework as it goes. The scope should say which you are buying.
Free-standing wall anchor
A plate on the inside wall tied to a plate buried in soil beyond the failure zone. Needs accessible ground outside at a workable distance — which is why it is not available on every site, regardless of what it costs.
Foundation drain
IRC R405: "Drains shall be provided around concrete or masonry foundations that retain earth and enclose habitable or usable spaces located below grade." Materials may be "Drainage tiles, gravel or crushed stone drains, perforated pipe or other approved systems."
Dampproofing vs waterproofing
These are two different code requirements, not two words for the same product. Which one applies is decided by the ground water condition at your site, not by the coating on the truck. A contractor who uses the words interchangeably is telling you something about the estimate.
Frost line
The depth to which ground freezes locally, published by your jurisdiction in IRC Table R301.2.
Exterior footings are to be placed not less than 12 inches below the undisturbed ground surface, and, where applicable, below the frost line specified for the locality. Both conditions apply and the deeper one governs.
Twelve inches is a floor, not a target: in a locality with a 42-inch frost line, 12 inches is nowhere near legal.
Limits
What this tool cannot do
Named blind spots rather than a disclaimer, because knowing where the edge is saves you asking the form a question it has no way to answer.
It cannot determine the direction of movement. That is the input, not the output. The dropdown asks you which movement you believe you have, and "unknown" is both an option and, for most readers before an elevation survey, the truthful one. A tool that guessed here would be doing the exact thing this page criticizes.
It cannot specify a count, a depth or a capacity. Those come from load, soil and geometry — none of which are on this page, and two of which need a site investigation. Anyone producing them from a web form is producing a sales figure.
It knows nothing about your soil. No lookup here reaches your address. The USDA NRCS Web Soil Survey gives general soil context free; even that is context, and onsite investigation is what engineering applications require.
It assumes you know which foundation you have. A pier method that suits a settled slab suits nothing else, so the foundation type identifier is the step before this one.
It cannot see water it was not told about. An irrigation zone running against one elevation, a neighbor’s regraded yard, a leaking service under the slab: all invisible here, and any of them can be the whole story.
It does not count piers. Where a pier method is the answer, the pier count estimator is the page that works through the spacing arithmetic and what would change it.
It has no price data and will not produce one. We hold no dataset of foundation jobs, bids, pier counts or invoices. The per-pier figures that circulate come from lead-generation sites with unpublished methods and we will not reprint them to look authoritative.
It is not a specification and cannot become one. A specification is signed by someone licensed and insured to have signed it, and that is the feature, not the bureaucracy.
HyreFoundation does not design repairs, does not inspect foundations, does not survey houses, does not perform the work, and takes no referral fee from anyone who does. That is what lets this page conclude that the correct next purchase is often a report, a plumbing test and a downspout extension.
How this calculator works
There is no product SKU. Two dropdowns pick a conversation and a warning:
unknown movement → survey + independent engineer, not a pier-only truck
settlement → support (piers to bearing) after water is corrected
heave → moisture, expansive clay, drainage, trees, plumbing leaks
lateral → wall stabilization, not a settlement pier count
water unfixed → diagnose, then water, then repair
water otherwise → still confirm gutters, grade and discharge before anyone drills
never → not a specification
Every path also says a company that only sells one method will tend to find that your house needs it. This tool exists to keep that sentence in front of the bid.
HyreFoundation does not design repairs, does not install piers, and does not waterproof basements.
What each input means
Inputs on this tool, in the order they appear on the form.
Input
What it is actually asking
Movement
Unknown, settlement (down), heave (up), or lateral (inward on a basement wall). Unknown is valid and common. "I think it settled" without an elevation survey is still unknown.
Water
Unknown, unfixed, or already corrected. Unfixed is the expensive one to skip. Unknown means you have not walked grade and downspouts in the rain yet.
Worked examples
Including one where the naive answer misleads, which is the example most calculators leave out.
Unknown movement, water not walked
Movement: unknown. Water: unknown. Pick: an elevation survey and an independent engineer decide the method, not a company that only sells piers. Wrong: if the only tool on the truck is a pier.
Water: still confirm gutters, grade and discharge before anyone drills. That is the default path. The useful next step is documentation plus an engineer you pay, not a product.
Heave, water unfixed
Movement: heave. Water: unfixed. Pick: heave is often moisture and expansive clay, not a missing pier. Drainage, trees and plumbing leaks are the first questions. Wrong: if someone immediately quotes push piers for a floor that went up.
Water: unfixed, and the order is diagnose, then water, then repair. Reverse that and you buy the repair twice. Extending downspouts is not glamorous and is the experiment that belongs first.
The one where a pier-only company misleads
A bowing basement wall. The company that only sells piers quotes interior push piers, because that is what is on the truck. Tick lateral.
The engine says wall stabilization (anchors, walers), not a settlement pier count, and "wrong if the quote is only interior piers for a bowing wall." Different movement, different fix. The misleading product is the one-method diagnosis.
Take that sentence to an engineer who does not sell either product.
What changes the result
Movement is the only switch that changes the method paragraph and the "wrong if" paragraph. Water only changes the water line. Unfixed gets the diagnose, water, repair order in plain language. The other two water states still tell you to confirm gutters, grade and discharge.
Unknown movement does not become settlement because the drywall looks like other settlement photos on the internet. That is how people buy piers for heave. An elevation survey is how the low spot and the high spot stop being an argument.
Nothing on the form asks how many piers. Count is not a method. Count is a later number on a scope an engineer wrote. The cost calculator will not even multiply a count without depth.
Local considerations
Which methods a licensed contractor in your state may offer, whether a permit is required, and which soil you actually sit on are local. We do not ship a city table of "use helical piers here."
NRCS Web Soil Survey is a general lookup. Expansive clay as a mapped soil property is not a method, and it is not a diagnosis of your house. Onsite investigation is needed for engineering applications.
ICC model drainage provisions (grade falling away from the wall) are not your inspector’s rule until the jurisdiction adopts them. Ask the building department what it enforces. Do not take a model-code paragraph as a local order to install a product.
When not to use this
Do not use this as a specification, a bid, or a reason to skip the engineer. It cannot see the soil, the wall, or the floor elevations.
Do not use it to accept a sign-today pier contract. A one-method truck is not a diagnosis.
Do not use "settlement" on this form unless you have evidence the structure went down. A crack that looks like settlement photos is not evidence of direction. Heave and settlement are corrected in opposite directions.
HyreFoundation does not design or install repairs. Matching is still being built. The inquiry form is not a dispatch line.
What is the difference between foundation settlement and heave?
Settlement is part of the house moving down, usually because soil below compressed. Heave is soil swelling and pushing part of it up, typically expansive clay taking on water. They crack walls alike but are corrected in opposite directions. An elevation survey tells them apart. See why foundations move.
Do I need foundation piers?
Only for settlement, and only after water is corrected and an engineer sets count and depth. Piers carry load down to firm soil. They are the wrong first fix for heave and the wrong fix for a basement wall bowing under soil pressure. The repair methods guide compares options.
Why fix water before repairing the foundation?
Because the concrete follows the ground, and the ground follows water. The order is document, independent diagnosis, water, then a repair scoped to the diagnosis. Reverse it and you buy the repair twice: a pier under a downspout that still dumps at the wall will be tested again.
What fixes a bowing basement wall?
Wall stabilization: anchors, braces, carbon fiber or steel beams, plus relieving the pressure with drainage and grading, sometimes excavation. Interior settlement piers are a different job. See bowing wall repair.
Can drainage alone fix a foundation problem?
Sometimes. Grading, gutters, downspout discharge and keeping irrigation off the foundation are the cheapest fixes, and sometimes the whole fix. They always protect a later repair, which is why the cost calculator treats drainage-only as a valid total.
How do I know which movement my foundation has?
Usually not from a crack photo. An elevation survey by a licensed surveyor or engineer maps floor heights across the house, and a second survey months later shows whether it is still moving. The elevation log is a two-reading notebook, not that survey.
A company offered a free inspection and a pier quote the same day. Is that a diagnosis?
No. It is a sales visit that arrived at the product on the truck. It can be honest, but it is not independent. The most useful step is a licensed engineer you pay, with no tie to the repair company.
Does expansive clay mean I need piers?
Not as a rule. Expansive clay swells when wet and shrinks when dry, so it is a moisture-cycle problem as much as a support problem. Drainage, trees and plumbing leaks are the first questions for heave. The USDA Web Soil Survey gives general soil context, not a method.
Does HyreFoundation design or install foundation repairs?
No. We do not design, repair, inspect or survey, and matching with companies is still being built. An engineer who does not sell the work sets the scope.
Sources and methodology
Figures dated 26 August 2026. Last reviewed .
Engineering Advisory Opinion Request 43 (February 2018) (Texas Board of Professional Engineers, retrieved 2026-09-05. Read directly as PDF. Diagnosing a foundation and recommending repair is engineering under Texas Engineering Practice Act §1001.003(c)(1). Texas law, cited as Texas law.)
Expansive Soil and Rock (Colorado Geological Survey, retrieved 2026-09-05. Swelling pressures up to 30,000 psf, 10–20% volume expansion on wetting, annual losses stated as exceeding tornadoes, floods, earthquakes and hurricanes combined, and the recommendation to consult a soil engineer and engineering geologist.)
TIP 17 — Drying Shrinkage of Concrete (National Ready Mixed Concrete Association, retrieved 2026-09-05. Read directly as PDF. Source of the ASTM C157 500 microstrain (0.05%) specification limit used as the concrete comparator in the volume-change chart.)
International Residential Code, Chapter 4 Foundations (International Code Council, retrieved 2026-08-26. Model code for foundation construction and for surface drainage away from walls (R401.3 in the 2021 IRC: grade falling not fewer than 6 inches in the first 10 feet, as a model provision). Not your city’s rule until adopted. Not a method selector.)
Web Soil Survey (USDA Natural Resources Conservation Service, retrieved 2026-08-26. General soil maps and engineering-related ratings. Expansive clay is a mapped idea, not a diagnosis of your house. Onsite investigation is needed for engineering applications.)
Building America program (U.S. Department of Energy, retrieved 2026-08-26. Moisture and durability as building science, not a pier specification.)
How to avoid a home improvement scam (Federal Trade Commission, retrieved 2026-08-26. Get the scope in writing. A sign-today product from a one-method truck is not a diagnosis.)