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Foundation Inspection Report Explained: How to Read Yours
Your foundation inspection report records floor elevations, crack maps, and repair recommendations. This guide shows how to read each section and what the numbers mean for your home.
How do you read a foundation inspection report? Start with the elevation map — it shows where your floors have moved and by how much. Then check the recommendation tier: monitor, repair soon, or urgent. The rest — crack diagrams, moisture notes, photos — explains why the inspector put you in that tier.
Reports look intimidating because they are packed with numbers and terms like “differential deflection” that nobody uses at the dinner table. But every report answers three plain questions: how much moved, where, and what to do about it. Once you know where those answers live, the rest is supporting detail.
What a Foundation Inspection Report Actually Is (and Isn’t)
A foundation inspection report records what an inspector observed, measured, and recommends about your home’s foundation: floor elevation readings on a mapped grid, a crack diagram with photos, moisture and drainage observations, and a recommendation with itemized pricing. Hand it to other contractors for second opinions, keep it with your house records, or share it with a buyer if you sell.
Just as important is what it is not. It is not an engineer’s sealed analysis — most residential reports are contractor inspections, not licensed engineer evaluations, and they carry different weight with insurers and buyers. It is not a warranty; it is a snapshot of one day. And it is not a repair contract — the recommendation is a proposal you can accept, negotiate, or decline.
Before reading further, check page one for the inspection date and the inspector’s name. In our shrink-swell clay, a two-year-old reading is ancient history — and if you cannot tell who wrote the report, you cannot hold anyone to it.
The Elevation Map: Your Floor’s Story in Numbers
The elevation map — sometimes called a floor elevation survey — is the heart of most reports. The inspector records heights at a grid of points across your floor, usually with a digital manometer or laser level, each relative to a reference point like the highest reading or front threshold. On the map, every reading sits at its location, sometimes with contour lines joining equal elevations.
Reading it is simpler than it looks: the spread between the highest and lowest numbers is your total differential. A slab reading from +0.0 down to –1.4 inches is out of level by 1.4 inches. But the pattern matters too. A steady side-to-side slope means one side settled together; a bowl in the middle points to center settlement; a sharp drop at one corner means localized footing movement, often tied to drainage right outside that corner.
One local wrinkle: readings taken in late August, after our clay has shrunk through a dry summer, almost always look worse than readings from a wet March. A good report notes the season. And one survey is a snapshot while two surveys a year apart are a trend — trends, not single numbers, drive smart repair decisions.
Deflection Readings: Turning Inches Into Meaning
“Deflection” is how far a section of foundation has bent or dropped from its original position. Relative deflection compares two points — the center of a room versus its edges, for example. Numbers only make sense against the report’s reference point, so check what “zero” was: the highest corner, the front threshold? Two reports can show different numbers for the same house simply because they zeroed differently.
What counts as significant? As a rule of thumb, differential under about three-quarters of an inch is within normal tolerance for a slab home, one to two inches is worth correcting, and more than two inches usually needs prompt attention. Those are working guidelines, not code limits — soil type, home age, and rate of change all factor in.
The most important number may not be an elevation at all: it is the rate of change. Half an inch over ten years is a different situation from half an inch since last spring. Old, stable settlement often just needs monitoring; fresh, active movement needs a plan. If your report never addresses rate of change, ask directly: “Is this old movement or active movement?”
Common Report Terms, Decoded
Inspection reports borrow vocabulary from structural engineering, and a few definitions turn the whole document from opaque to obvious:
- Differential settlement: one part of the foundation sinking more than another. The “differential” is what cracks walls and sticks doors — uniform settlement rarely damages anything.
- Heave: upward movement from clay swelling after heavy rains; the opposite of settlement.
- Tolerance: the amount of movement considered normal and not worth repairing.
- Monitor: the recommendation to re-check in six to twelve months rather than repair now. For slow, stable conditions it is the right call.
- Stabilize: stop further movement, typically with piers, without lifting the foundation back toward level.
- Lift / re-level: actively raising settled sections toward their original elevation.
- Footing: the wider concrete base under the foundation edge or piers that spreads the load into the soil.
- Point load: a concentrated weight — a gun safe, a grand piano — pressing on one spot and causing local settlement.
When a report uses a term not on this list, ask the inspector to define it in plain words. A professional who cannot explain a term simply may not understand the finding behind it.
The Three Recommendation Tiers: Monitor, Repair Soon, Urgent
Nearly every report lands in one of three tiers, usually on the summary page. Finding yours tells you how to read everything else:
| Tier | What It Means | Typical Next Step |
|---|---|---|
| Monitor | Movement within tolerance, or older movement that appears stable; no active damage | Re-inspect in 6–12 months; handle drainage and gutter issues in the meantime |
| Repair soon | Differential beyond tolerance; damage progressing but no structural emergency | Get two or three written proposals; plan pier or leveling work within the year |
| Urgent | Rapid or severe movement, structural distress such as major cracking or bowing, or a safety concern | Act within weeks; get engineering input if the report recommends it |
A reputable inspector states your tier plainly and ties it to the measurements — “1.6 inches of differential at the southwest corner, active this year: repair soon.” Be cautious with a report that prescribes expensive work with no tier, no justifying measurements, and same-day pressure. The numbers should sell the job, not the salesperson.
“Monitor” is a real recommendation, not a polite “we found nothing.” It means spending money now would buy you nothing. A company willing to say “not yet” is one you can trust when the answer becomes “now.”
Crack Diagrams: Reading the Lines on the Page
Most reports include a floor-plan sketch with cracks drawn in place, often with widths noted. Direction tells a story: vertical slab cracks usually mean shrinkage or minor settlement and are often cosmetic; diagonal cracks from door and window corners point to differential movement pulling one side down; horizontal cracks in block or poured walls suggest lateral soil pressure and deserve respect.
Width is the other half: hairline cracks under 1/16 inch are generally cosmetic; cracks around 1/8 inch merit monitoring and sealing; cracks approaching 1/4 inch — especially growing ones — usually enter the repair conversation.
Photos matter as much as diagrams: a good report photographs every significant crack with a ruler or coin for scale. If your crack section has sketches but no photos, ask for them — you will want them for second opinions and for tracking growth between inspections.
Moisture, Drainage, and Plumbing Notes
Foundation problems here are water problems wearing a concrete costume, so read the moisture section carefully. It should note grading (does soil slope away?), gutter and downspout discharge, any standing water, and — critically for slab homes — whether a plumbing leak test was performed or recommended. Much local “settlement” turns out to be soil softened by a leaking line under the slab.
Read this section as a to-do list. Fixing drainage and plumbing first can stop movement that no pier will cure, and reputable contractors want the water handled before they lift anything. The U.S. Geological Survey’s research on expansive clay soils explains why our soil swells and shrinks so dramatically between wet springs and dry summers — and why controlling water near the foundation matters as much as any pier. If the report flags grading or gutter issues, our drainage correction service covers the standard fixes, and our guide on who to call for a foundation inspection helps if you want a second set of eyes.
Red flag: a report recommending thousands in pier work while barely mentioning the standing water photographed on page three. Water first, structure second — always.
Questions to Ask Before You Approve Any Work
Take your report to every estimate and ask these questions. The answers — and how willingly they come — tell you as much as the report:
- What is my total differential, and what tolerance are you judging it against? If the contractor cannot name both numbers, the recommendation is a guess.
- Is this movement old or active? Active movement changes the timeline; old movement changes the urgency.
- Which tier am I in — monitor, repair soon, or urgent — and what would tip me into the next one?
- What scope of work are you proposing — and what does each element address? Every line item should map to a finding in the report.
- Will you lift toward level or only stabilize, and what final elevations should I expect? “We’ll get it close” is not an answer.
- What does the warranty cover, for how long, and is it in writing? Verbal warranties are stories, not protection.
- Should drainage or plumbing be fixed first? If the answer is “don’t worry about it,” worry about it.
Write the answers on the report and keep it with your house records. Clear answers signal a contractor you can trust; dodged ones tell you something too.
What a Pelican Foundation Inspection Report Includes
Our free inspections across Shreveport, Bossier City, and surrounding parishes — Monday through Saturday, 8:00 AM to 6:00 PM — produce a written report built for exactly this kind of reading: elevation readings on a mapped grid, a crack diagram with scaled photos, moisture and drainage observations, a plain-English recommendation tier, and itemized pricing. Whether the honest answer is “monitor” or “repair soon,” you keep the report and photos either way.
If you are scheduling your first inspection, here is what to expect during a foundation inspection, and our foundation inspection service page details the full process. Whether you end up needing foundation repair or just peace of mind, the U.S. Department of Housing and Urban Development publishes homeowner guidance on foundation maintenance worth a skim before anyone digs around your house.
Frequently Asked Questions
What should a foundation inspection report include?
Floor elevation readings on a mapped grid, a crack diagram with scaled photos, moisture and drainage observations, a recommendation tier, and itemized pricing. Ask the inspector to add anything missing.
How much foundation movement is considered normal?
Under about three-quarters of an inch is generally within tolerance for a slab home; one to two inches is worth correcting; more than two inches usually needs prompt attention. Soil, age, and activity all factor in.
What does “monitor” mean on a foundation inspection report?
The inspector judged the movement stable or within tolerance and recommends re-checking in six to twelve months. Spending money on a stable foundation buys you nothing.
Do I need a structural engineer or a foundation contractor’s inspection?
For most homes, a qualified contractor’s inspection with elevation readings is the right start and is often free. Bring in a licensed structural engineer when the report recommends it, when an insurer or buyer requires a sealed evaluation, or when the pattern is unusual.
How often should foundations be inspected in Louisiana?
Every few years is sensible here, plus a check after extremes — drought, flooding, or new cracks. “Monitor” homes should be re-measured on the report’s schedule, usually six to twelve months.
Can I get a second opinion on a foundation inspection report?
Absolutely — and you should for any significant work. A complete report lets the next inspector verify readings instead of starting from zero. Be wary of companies that discourage second opinions.
Will homeowner’s insurance cover what the report found?
Usually not for settlement, which policies exclude as earth movement. Sudden events like plumbing leaks may be covered. Ask your agent, not your contractor, what the policy covers.
How long is a foundation inspection report valid?
Treat it as current for about a year, less if conditions change. Get elevations re-checked before signing off an older report.
Pelican Foundation Repair
6118 Fairfield Ave, Shreveport, LA 71106, USA
318-585-2003
https://foundationrepairshreveport.com/