Clay swells when it takes on water and shrinks when it dries, so the damage comes from the swing between the two rather than from water alone.
Too wet, too dry, or swinging between the two?
This is the group where the wrong answer actively causes harm, so it is worth getting the direction right before buying anything. If water stands against the structure after rain, the ground under the edge is swelling while the middle stays put, and the work is to get surface water away: grade first, then extend the downspouts, in that order. Extending a downspout onto ground that slopes back toward the house just delivers the water further out and lets it run straight back. If the soil is pulling away from the slab edge in a dry spell, the ground is shrinking and the edge is losing support. That is when steadier watering and, where a large tree is close enough to be drawing from under the structure, a root barrier are worth pricing. Adding water to ground that is already staying wet makes the movement worse in the other direction, which is why this decision has to come before the purchase rather than after.
Where water goes when it lands on a Houston lot
About 96% of the mapped soil around Houston sheds water rather than taking it in, and roughly 5% of the area is rated for ponding. Those two facts decide what a downspout extension is worth. Water that cannot soak in has to go somewhere. If the grade sends it at the house, it arrives where a few inches of soil moisture becomes a structural question.
The jobs this covers, and what each one costs to get wrong
Surface Drainage Correction
Re-grading and shaping the ground within the first several feet of the structure so surface water leaves rather than stands. It is the first thing to correct on a clay lot, because water standing against a slab is the mechanism behind most of the movement on this page.
What moves the price. How much soil has to move and what is in the way. Beds, walkways, air conditioning pads and mature plantings all have to be worked around or lifted and reset.
When Surface Drainage Correction is the wrong answer. If the water is arriving from a neighboring lot or a street that drains toward you, regrading your own ground moves the problem a few feet. That is a larger conversation and sometimes a municipal one.
Gutter and Downspout Extension
Carrying roof water far enough from the structure that it does not soak the ground the foundation bears on, by extension or buried line. It is the cheapest intervention available on a clay lot and the one most often missing. A roof sheds a great deal of water into a very small area.
What moves the price. Run length and whether the line is buried. Surface extensions are simple. A buried run needs a trench, a fall the whole way and somewhere legal to discharge.
When Gutter and Downspout Extension is the wrong answer. If the ground already slopes back toward the house, extending a downspout delivers the water further out and lets it run straight back. Grade first, then extend.
Root Barrier Installation
A vertical barrier set in a trench between a tree and a structure, so roots are turned down rather than drawing moisture from under the slab. It is specific to clay and to large trees close to a house, where a dry season pulls moisture out of the soil the foundation is bearing on.
What moves the price. Trench length and depth, and what the trench has to pass through. Utilities, walkways and existing roots all slow it. Depth is set by the soil, not by preference.
When Root Barrier Installation is the wrong answer. If the tree is far enough away that its roots do not reach under the structure, a barrier buys nothing. Have the distance and the soil looked at before trenching a yard.
Foundation Watering System
Soaker line set at a fixed distance from the slab edge and run on a timer, to hold the moisture in the supporting soil steadier through a dry season. It is a clay-country maintenance measure. The damage comes from the swing between wet and dry, so the aim is a steadier moisture level, not a wetter one.
What moves the price. Perimeter length, the number of zones and whether a timer and backflow device are included. Running a line under existing walkways and driveways is the part that adds time.
When Foundation Watering System is the wrong answer. If the soil around the structure is already staying wet, adding water makes the movement worse in the other direction. This is the one item on the page that can be actively harmful when it is the wrong answer.
Get an estimate in Houston
None of this can be priced from a description. Three things decide it. What the ground does with water. How much fall the site has. Where the water may go at the end. 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 Houston takes it from there. If it turns out to be a cheaper job than the one you came here for, that is worth hearing before anyone digs.
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Read what a Houston foundation repair job costs before calling anyone, and check the Houston Foundation Repair Co service area to see whether your street is covered.
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The ground under Houston
Questions people actually ask
How far from the house should a downspout discharge?
Further than most are. The aim is to get roof water past the soil the foundation bears on, which is a matter of feet rather than inches, and a splash block at the wall does not achieve it.
Should I water my foundation?
Only if the soil is drying and pulling away. The aim is steadier moisture, never wetter soil, and watering ground that is already saturated makes the movement worse rather than better.
Do trees really damage foundations?
Large trees close to a structure draw moisture out of the soil during a dry spell, and on clay that loss of volume is what removes support. The tree does not have to touch anything to do it.
Is a root barrier the same as removing the tree?
No, and it is usually preferable. A barrier turns roots downward away from the structure while the tree stays. Removing a mature tree changes the soil moisture sharply in its own right.
What should I fix first?
Grade, then gutters, then everything else. Those two are the cheapest interventions available and they address the mechanism directly, which is why anything else bought before them is bought in the wrong order.
Trusted across Houston, Texas and Harris County
What this site is good for
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Residential and commercial
A house with a wet basement and a site with standing water on a hardstanding are different jobs at different scales. Both are covered, and the pages say which is which.
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Free, and nothing attached
Working out which job you actually have costs nothing and commits you to nothing. There is no fee to you at any point, because this site is paid by the contractor and not by you.
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Your details are not for sale
An address sent here goes to a foundation repair contractor working in the area. It is never sold, and never passed to a second firm.
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Permits named, not glossed
The pages name the authority that issues the permit for this work and the inspection that goes with it, so you can ask to see one before the first cut.
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Every figure sourced and dated
Soil, rainfall and housing figures each name where they came from and when they were retrieved. Where a published estimate carries a margin of error, the margin is shown too.
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One town, covered properly
This site is about one place and the towns within a short drive of it. It is not a national directory with a city name dropped into a template.
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An open pier cut past the slab edge. How deep it has to go is decided by the ground, not by the house. -
The lift itself, read off a dial indicator. Deciding where to lift is the part that takes the measuring.
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 Houston. 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.