Most St. Louis foundation repairs proceed on a free measured evaluation; an independent structural engineer earns the fee when the diagnosis is contested — a brick purchase, suspected karst movement, or an insurance fight. Against repairs running $3,800–$12,500, independent judgment is cheap protection.
What each evaluation delivers, the STL cases that demand a stamp, and how the two mesh.
Same measurements, different products
Both evaluations begin with the same instruments — elevations, crack widths, plumb readings. Ours returns as a free measured report with a priced scope: objective numbers attached to an interested bid, which is how every contractor’s diagnosis should be read, including this one. The engineer’s returns stamped, in the hundreds of dollars, attached to no repair revenue — and that detachment is the entire product.
Who to call first, by situation
| Situation | Start with | Why |
|---|---|---|
| Cracks or slopes, staying put | Contractor evaluation | Free, measured, priced — nothing lost if minor |
| Buying or selling century brick | Independent engineer | A hundred years of history needs unsold judgment |
| Movement that ignores the seasons (south metro) | Independent engineer | The karst question precedes any repair design |
| Bids naming different causes | Independent engineer | A stamped tiebreaker beats the wrong repair |
| Insurance causation dispute | Independent engineer | Stamps move adjusters; adjectives don’t |
| Severe movement, redesign territory | Engineer, then contractor | Stamped design first, installation to spec second |
The two STL cases that make this page necessary
Karst. Most settlement here is clay doing clay things, and the survey confirms it. But south-metro movement that progresses regardless of weather needs geotechnical eyes before repair design — piering into a raveling void wastes steel and worse. We flag that case instead of bidding it.
Century masonry. Brick records everything and forgives little. Repair design on a three-story city house — lift staging, restraint for a leaning wall, party-wall questions — can genuinely need a stamp, and pre-purchase negotiations on old brick almost always benefit from one. The insurance page covers the adjuster version of these fights.
When both are on a foundation repair job
The sequence is clean: the engineer prescribes — pier locations, capacities, wall design — and we install to prescription, logging each pier’s torque or refusal against the spec, so verification happens on paper. You finish holding a stamped diagnosis, a documented install, and a transferable warranty — the stack a future buyer’s inspector reads as engineered rather than guessed. Costs, layer by layer, are in the cost guide.
What a report worth paying for contains
Judge the report, not the credential. A useful one carries an elevation survey in numbers rather than adjectives, a stated cause, a specific remedy — pier type or wall system, spacing, and the depth or capacity it must reach — and the stamp standing behind all three. In this metro it should also say which story it is: clay and water, freeze-thaw on a century wall, or a karst void under the south side. Those get different scopes and only one of them is a drainage conversation. What you don’t want is a letter restating your cracks that ends with “consult a foundation contractor.” Keep it for the disclosure file when the house sells.
Engineer questions, straight answers
Do I need an engineer before getting STL repair bids?
Usually not — the free measured evaluation produces the same field data: elevations, crack maps, wall plumb readings. The engineer's stamped version earns its fee when independence is the product: buying or selling century brick, a karst question in the south metro, an insurance causation fight, or bids that name different causes.
When is the engineer non-negotiable here?
Suspected karst involvement. Movement that ignores the seasons, concentrates strangely, or pairs with yard depressions needs an independent geotechnical read before anyone designs a repair — steel placed into a raveling void is money buried. We flag that case rather than bid it, and the engineering happens first.
What about buying an older brick house?
The strongest routine case. Century masonry in the city, Webster Groves, and Kirkwood carries a hundred years of movement history in its mortar, and a purchase negotiation needs a number nobody profits from. A stamped pre-purchase report prices the risk; our survey data feeds it, but the independence is what the negotiation actually uses.
What does the engineer's report contain that your evaluation doesn't?
Nothing in the measurements — cause, severity, and prescription, stamped, with no repair attached. Ours arrives free with a priced scope; weigh it knowing we sell the fix. Courts, lenders, adjusters, and skeptical buyers weigh the stamp precisely because it sells nothing else.
Will you install to an engineer's specifications?
Yes, and on contested or engineered jobs we prefer it. We bid the specified scope line by line and log every pier's torque or refusal against the spec so the engineer can verify from paper. If we believe a spec misreads the measurements, we say so in writing to you and the engineer — never by quiet substitution.
Get a free St. Louis foundation evaluation
Tell us what the house is doing — cracks, bowing, sticking doors, sloping floors — and we'll schedule an evaluation with photos and crack measurements. We reply the same business day.