Two licences, two different questions
The confusion in this subject is almost entirely about scope, and it is written into the rules.
The Texas Real Estate Commission licenses inspectors in three tiers. An Apprentice Inspector must be sponsored and works under the direct supervision of a Professional Real Estate Inspector. A Real Estate Inspector must be sponsored and works under indirect supervision. A Professional Real Estate Inspector requires no sponsorship and is the only tier that may inspect independently. Reaching that top tier by the sponsored path requires 134 hours of qualifying education, twelve months as an active Real Estate Inspector within the previous 24 months, and 175 completed inspections.
That is substantial training, and it is training in a defined thing. The Standards of Practice define a real estate inspection as "a limited visual survey and basic performance evaluation of the systems and components of a building using normal controls" which "is not intended to be a comprehensive investigation or exploratory probe to determine the cause or effect of deficiencies" (22 TAC §535.227).
Read that clause slowly, because it is the whole boundary. An inspector is licensed to report performance. The door does not latch. The floor slopes. The veneer shows stair-step cracking above the garage opening. Those are observations of how the building is behaving.
Cause and effect are explicitly outside it. Why the door does not latch, whether the soil beneath is doming, whether the movement will continue, and what work would arrest it — those are engineering determinations. In Texas they belong to a licensed professional engineer, and no amount of inspection experience converts one into the other.
This is not a limitation an inspector is embarrassed by. It is the reason the report is credible on what it does cover.
What the inspection report actually is
Texas is unusual in prescribing the form. Under 22 TAC §535.223, an inspection performed for a prospective buyer or seller of substantially complete one-to-four family residential property must be reported on Form REI 7-6. TREC adopted the updated Standards of Practice on 9 August 2021; the form could be used voluntarily from 1 September 2021 and became mandatory for all Texas inspections on 1 February 2022. If software produces the report, it must reproduce the standard form's text verbatim, with identical spacing, borders and placement.
The form works on four check boxes: I (Inspected), NI (Not Inspected), NP (Not Present) and D (Deficient), with written comments. Any item marked D has to be explained in writing.
What that produces is a snapshot of observed condition on the date of the inspection, covering readily accessible components. It is not a code-compliance inspection, not a warranty or guarantee, not insurance, not a pass or fail grade, and not an appraisal.
And then there is the provision that generates more complaints than any other. Under §535.227, an inspector cannot be required to provide repair cost estimates, recommendations, or re-inspection services. Nor can an inspector be required to anticipate future events or conditions.
So when a report says the foundation shows evidence of movement, recommends evaluation by a licensed professional engineer, and attaches no number and no repair plan — that is the rule operating exactly as designed. It is not evasion. An inspector who hands you a pier count and a price has stepped outside the document they are licensed to produce, and into the role of the party who profits from the answer.
Two further exclusions matter for foundations specifically. Inspectors are not required to inspect anything buried, hidden, latent or concealed — which covers the soil, the sub-slab plumbing and every tendon in a post-tensioned slab. And they are not required to report past repairs that appear to be effective and workmanlike, cosmetic or aesthetic conditions, or wear and tear from ordinary use.
What an engineer adds
The value of engaging a Texas-licensed professional engineer is not that they look harder. It is that they are permitted to answer a question the inspector is not.
An engineer can form and state an opinion on cause: whether the pattern of distress is consistent with centre lift, edge lift, a plumbing leak, a settlement problem, framing, or something that was built that way. An engineer can specify a remedy, including where support is needed and to what performance objective. An engineer signs and seals their work, and carries professional responsibility for it.
Practically, an engineering evaluation of a residential foundation in this region will normally include a floor elevation survey — a measured map of relative floor heights across the house — read alongside the interior and exterior distress, the drainage and irrigation conditions, the tree locations, and the plumbing history. The elevation survey is the piece that turns anecdote into data, and it is why the date and season on it matter so much: North Texas slabs commonly cycle between dishing and doming across a single year, so surveys taken months apart can legitimately disagree.
The other thing an engineer offers is structural to the market rather than to the house. A peer-reviewed HUD Cityscape chapter cites a 2000 study finding that Dallas listed more than 120 foundation repair companies while roughly 15 geotechnical engineering firms were doing residential foundation design. The figure is dated and the phone book is gone, but the ratio describes the situation a homeowner still walks into: the readily available expertise is attached to companies that sell the remedy. An engineer paid a fee for an opinion, who will not be performing the work, is the only participant in this transaction with no stake in the answer.
The findings that justify one
Escalation should be triggered by specific indicators, not by anxiety and not by the existence of cracks. The ones that genuinely warrant an engineer:
- Distress that is progressing across seasons, documented — photographs, dates, marks at crack ends, measurements — and continuing after drainage and irrigation problems have been corrected.
- Clustered findings in the same area of the house. One symptom means little. Out-of-square door reveals, stair-step cracking in the veneer, measurable floor slope and separated trim all concentrated in the same quadrant is a pattern.
- Vertical offset rather than width. A crack whose two sides are no longer in the same plane is describing displacement, not shrinkage.
- Displaced or rotated brick ledge, separation at brick-to-window or brick-to-door frames, or out-of-level brick courses.
- Separation at an interior masonry fireplace, or a shifted chimney — AgriLife lists chimney movement among the more serious consequences of soil movement, alongside broken pipes and cracking veneer.
- Tented or cracked ceramic tile running in a line, particularly with a corresponding floor slope.
- A confirmed under-slab plumbing leak in a house that is also moving. Slab movement shears drain lines, and a leaking line causes localised heave or washout. When both are present, someone has to determine which is driving which.
- Evidence of a broken tendon in a post-tensioned slab — typically a cone-shaped concrete blowout at the perimeter.
- Any plan to cut, core or anchor into a post-tensioned slab. Tendons must be located first, without exception.
The findings that do not
This is the half of the conversation the market has no reason to have with you, so it belongs on the page.
None of the following, by itself, justifies an engineering evaluation:
- Hairline cracking in the visible slab edge. Concrete shrinks as it cures. This is not a measurement of anything.
- Drywall seam cracking and nail pops. Common, seasonal, and largely a finish issue.
- A crack that visibly narrows or closes after a wet period. AgriLife describes the mechanism directly: when moisture returns, the clay expands and lifts the foundation, potentially closing cracks. A crack that behaves that way is riding the seasonal cycle.
- A door that binds in August and closes fine in March. Same reason.
- "The house has a post-tension slab." That is a construction type, and in expansive-soil subdivisions of the era it is the standard one. It is not a finding.
- Cracks in a fifty-year-old house that has not changed in the ten years the seller has owned it. A slab that has cycled through decades of North Texas drought and rain without progressive distress has already told you something a new slab cannot.
- Past repairs that appear effective and workmanlike. The Standards of Practice do not even require these to be reported.
The correct answer in a large share of North Texas houses is to correct the drainage, water the perimeter consistently, document the distress, and re-look after a full wet–dry cycle. That answer costs almost nothing and nobody selling piers will ever give it to you.
The order to do things in
Sequence matters, both for what you learn and for what it costs you.
1. General inspection first, and early. Ancillary services stack days — a sewer scope, a static plumbing test, an engineer, a WDI report and a pool inspection are each separate appointments with separate providers. In an option period, the general inspection needs to happen in the first day or two so specialists still fit inside it. Utilities must be on; the TREC resale contract obligates the seller to permit access and keep them on, and an inspection at a house with the water or power off wastes both a fee and a day.
2. Rule out plumbing before you price structure. On any slab house, particularly one of the cast iron era, a camera scope and a static test are the two things most likely to change what you know. An engineer asked to explain movement will want an under-slab leak ruled in or out, and a foundation contractor's proposal written without that information is built on an assumption.
3. Document drainage and irrigation. Walk the perimeter after a hard rain, not before. Photograph where water stands, where soil has washed, and where the mud line sits on the brick. This is free and it is often the actual answer.
4. Then the engineer, if the indicators are there. With a plumbing result, a drainage record and dated photographs in hand, an engineer is being asked a well-posed question rather than a vague one.
5. Repair contractors last, and against a written scope. Not first. A company that sells pier work is not a neutral judge of whether you need pier work, and that is a statement about incentives rather than about honesty.
You can confirm any Texas inspector's licence level and status yourself through TREC's public License Holder Search, and read the Standards of Practice in full at 22 TAC §535.227. Both take a minute and both are worth doing before you accept anyone's characterisation of what a report can say.
Common questions
Can a home inspector tell me why my foundation is moving?
No. The Texas Standards of Practice define a real estate inspection as a limited visual survey and basic performance evaluation using normal controls, and state that it is not intended to be a comprehensive investigation or exploratory probe to determine the cause or effect of deficiencies. An inspector reports what the house is doing. Determining why it is doing it is an engineering determination, and in Texas that requires a licensed professional engineer.
Why doesn't my inspection report include a repair cost?
Because the rule says it does not have to. Under 22 TAC §535.227 an inspector cannot be required to provide repair cost estimates, recommendations, or re-inspection services, and cannot be required to anticipate future events or conditions. A report that identifies a deficiency and recommends evaluation by the appropriate licensed specialist is the form working correctly. An inspector who supplies a pier count and a price is doing something other than inspecting.
Should I call an engineer or a foundation repair company first?
An engineer, if the indicators justify escalation at all. A repair company writes an opinion and a price for its own work in the same document, which is a sales proposal however carefully it is written. An engineer charges a fee for an opinion and does not perform the repair. A dated HUD-published figure captures why this matters here: Dallas once listed over 120 foundation repair companies against roughly 15 geotechnical firms doing residential design. Independent capacity is the scarce commodity.
Does a cracked wall mean I need an engineer?
Usually not. Drywall seam cracking, nail pops, hairline cracks at the slab edge and cracks that narrow again after a wet spell are all consistent with a house riding the normal seasonal soil cycle. What justifies an engineer is a pattern: distress that progresses across seasons after drainage has been corrected, findings clustered in one quadrant, vertical offset rather than width, displaced brick ledge, a shifted chimney, or movement alongside a confirmed under-slab leak.
What should I have ready before the engineer arrives?
The inspection report, the results of a camera scope and static plumbing test if the house is on a slab, dated photographs of the distress with something for scale, any record of when the symptoms appeared, and a note of the drainage and irrigation conditions — where downspouts discharge, where water stands after rain, where the sprinkler heads point, and which large trees are close to the slab. An engineer given a time series and a plumbing result answers a much sharper question than one given a walkthrough.