Cracks are repaired once movement has stopped. Sealing one that is still opening buys a season and removes the only thing telling you how fast the house is moving.
Is the crack still moving, or is it a record of something that already happened?
This is the whole decision and it is not answerable by looking. A crack that has been the same width for three years and a crack that opened last spring look identical in a photograph, and only one of them should be filled. What separates them is measurement over time. A dated photograph with a ruler in it, taken a few months apart, costs nothing and answers it. So does an elevation survey, and in a basement so does a string line down the wall, which tells you whether the wall itself has bowed. Once you know it has stopped, the crack is a path for water and air rather than a symptom, and injection is the right job. Once you know it has not, filling it is the wrong purchase and the money belongs on whatever is moving it: the footing under the house, or the wall behind the crack.
Why cracks in St. Peters open and close with the season
Up to 48% of the mapped soil here is clay, and the median St. Peters home dates from 1988. Clay moves with moisture. Anything rigid attached to it cracks along its weakest line rather than bending. That is why the width of a crack says less than whether it is still changing, and why a house that has done this for decades is a different case from one that started last spring.
What each foundation repair covers, and what it costs to get wrong
Foundation Crack Injection
A crack filled under pressure with epoxy or polyurethane so the two faces are bonded or sealed along the full depth. It is the answer once movement has stopped and the crack is a path for water or air rather than a symptom that is still growing.
What moves the price. Length, depth and access. A crack reachable from inside a garage is cheap. The same crack behind a finished wall is priced with the demolition and the making good. Epoxy and polyurethane are not interchangeable and are not priced alike.
When Foundation Crack Injection is the wrong answer. If the crack is still opening, filling it buys a season and hides the evidence. Have the movement measured first. A sealed crack that reopens has cost you the repair and the record of how fast it moved.
Brick and Mortar Crack Repair
Repointing and stitching of stair-step cracking in brick veneer, and resetting of the shelf the veneer sits on where it has moved. It is cosmetic repair that comes after the structure is stable, not instead of it. Veneer cracks are the most visible record of movement underneath.
What moves the price. Access and match. Ground-floor work from a ladder is one price, second-story work from staging another. Matching an older mortar color and an out-of-production brick is usually the hard part.
When Brick and Mortar Crack Repair is the wrong answer. If the crack is still widening, repointing it removes the one thing telling you the house is moving. Measure first, repair second. That order is not a sales preference, it is the only way to know the repair will hold.
Get a foundation repair estimate in St. Peters
None of this can be priced from a description. Three things decide it. How many support points the house needs. How deep each one has to reach before it finds ground that does not move. How much of the work is indoors. All three are facts about an address, and none of them show up in a photograph. Send the address and what you are seeing. Someone who does this work in St. Peters takes it from there. If it turns out to be a smaller job than the one you came here for, that is worth hearing before anyone starts.
St. Peters Foundation Repair Co services.
Read what a St. Peters foundation repair job costs before calling anyone, and check the St. Peters Foundation Repair Co service area to see whether your street is covered.
Back to St. Peters Foundation Repair Co.
The ground under St. Peters
Which way a wall crack runs matters more than how wide it is
Surface clay runs as high as 48 percent in St. Peters
Clay is the finest fraction of a soil, and it is the fraction that holds water. Ground with this much of it swells through a wet spell and presses harder on the wall it is packed against. A crack that runs along a wall and one that runs up it are sorted into different jobs, and which one you have is for an inspection to establish. Ask whether the crack has been measured on two separate dates, and ask what those dates were.
USDA NRCS Soil Survey Geographic Database (SSURGO), via Soil Data Access
What the wall is made of decides which repairs a crack in it can take
The median St. Peters home was built in 1988
A poured concrete wall and a concrete block wall crack in different patterns, and older stone or brick walls in different ones again. A single vertical crack in a poured wall and a stepped crack through the mortar of a block wall are not the same job. Ask what the wall is before anyone prices the crack. Epoxy bonds two faces together and assumes the movement is finished.
US Census Bureau, American Community Survey 5-Year Estimates 2023
Questions people actually ask
How wide does a crack have to be before it matters?
Width is the wrong single test. A hairline crack that is growing matters more than a wider one that has been still for a decade, which is why the measurement over time is the thing worth having.
What is the difference between epoxy and polyurethane injection?
Epoxy bonds the two faces together and is used where the crack is not expected to move again. Polyurethane stays flexible and seals against water. They are not interchangeable and are not priced alike.
Do stair-step cracks in brick mean the foundation has failed?
They mean something underneath has moved. Brick veneer is rigid and cracks along its mortar joints when the shelf it sits on shifts, so it is often the most visible record of movement, not the problem itself.
Should I repair the brick before or after the foundation?
After. Repointing first removes the record of the movement and the new mortar cracks again when the house moves further. The order is not a sales preference, it is the only way to know the repair will hold.
Can I fill a foundation crack myself?
Surface patching is within reach of most people and seals almost nothing, because a crack runs the full depth of the concrete. Injection under pressure is what reaches the rest of it, and that is equipment work.
Is a horizontal crack in a basement wall worse than a vertical one?
It is the one to measure first. A horizontal crack along a block wall, or a stair-step one through its mortar, is the pattern soil pressure leaves when it pushes a wall in. A vertical hairline in poured concrete is more often shrinkage from when it cured, and neither should be filled before anyone has checked the wall for bow.
Ground that is saturated has nowhere to put the next storm, and water sitting against a wall keeps working on it.
What happens after you send an address
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The address first, and only then who you are
The first screen asks for the property address and checks that a contractor covers it. Only if one does does it ask for a name, a phone number and an email — there is no point taking your details to tell you nobody serves your street.
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Your details are not for sale
It goes to a foundation repair contractor working in St. Peters. The details are never sold, and never passed to a second firm.
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No cost, and nothing attached
There is no fee for sending an address and no obligation that follows from it. Deciding the work is the wrong work is a perfectly good outcome.
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Who does the work
An independent foundation repair contractor, not the publisher of this site. Who runs this site, and where every figure on it comes from, is set out on the about page.