These guides answer the questions people ask before they call anyone about a foundation: is this crack serious, why won't the door close, which repair method fits my house, and what will it cost. They're written for Houston homes, which mostly sit on a concrete slab or, in older neighborhoods, on pier and beam over a crawl space. Start with the section that matches what you can see. Each guide gives you the direct answer first, then the detail, so you can judge whether you're looking at normal movement or something a local foundation contractor should check. When you're ready for a visit, our Houston foundation repair service arranges it.
Where to start
Start with what you've noticed, not with the repair. If you've found a crack, read the crack guides first. If doors stick or floors slope, go to leveling and floors. If water pools by the house or the soil pulls away from the slab, start with drainage. If you're buying a house or filing a claim, go straight to insurance and buying. Prices are in their own section at the end.
Most Houston foundation questions come back to one cause: the clay. The USDA describes the Lake Charles clay found across much of the area as 45 to 60% clay, and in dry spells it cracks open up to two inches wide at the surface. When rain returns, it swells again. That cycle is why the same handful of symptoms shows up in so many homes here.
If you only read three guides, make them these:
- Foundation problems vs normal settling, which helps you decide whether movement is routine or needs a look.
- Vertical vs horizontal foundation cracks, which explains what the direction and width of a crack tell you.
- What a foundation inspection covers, so you know what a proper assessment involves before anyone quotes a repair.
The guides by topic
The guides fall into six groups: cracks and signs, piers and methods, leveling and floors, drainage and watering, insurance and buying, and costs. Read the broad page in a group first, then the narrower guide that fits your house. Every guide on the site is listed further down this page as well.
Cracks and warning signs
Cracks are the most common reason people start reading. Some are cosmetic shrinkage. Others show the slab or beams have moved.
- Foundation crack repair: how cracks in a Houston slab are assessed and sealed, and when sealing alone isn't enough.
- Vertical vs horizontal cracks (linked under Where to start): reading a crack by its direction, shape and width.
- Doors sticking: why doors and windows start to bind when a frame goes out of square, and how to tell humidity from movement.
- Signs your foundation is settling: the pattern of symptoms that points to a sinking section rather than a single crack.
- Problems vs normal settling (also linked above): where routine movement ends and repair begins.
- What a crack in a wall means: what each common wall crack usually says about the house behind it.
- Hairline cracks in walls: the finest cracks, why they appear and how to hide them for good.
- Structural cracks in walls: the width, shape and pattern that separate a structural crack from a cosmetic one.
- Non-structural foundation cracks: the slab and wall cracks you can watch rather than repair.
- Normal foundation settling cracks: what ordinary settling looks like in a Houston house.
- Foundation floor cracks: how a slab crack shows through tile, wood, vinyl and carpet.
- Repairing cracks in exterior walls: brick, stucco and siding cracks on the outside of the house.
Piers and repair methods
Most structural repairs in Houston use piers to carry the house down past the most active soil. The method depends on the house and the load.
- Foundation piers: pressed concrete, steel and helical piers, how deep they go and how many a house needs.
- Helical vs push piers: how a screwed pier and a driven steel pier differ, and where each one suits.
- Slab foundation repair: how a sinking slab on grade is supported and lifted.
- Pier and beam foundation repair: resetting, shimming and replacing piers under older raised homes.
- Pier and beam vs slab: how the two foundation types behave on Houston clay.
- What piers mean in a foundation: plain definitions of piers, piles, posts and footings, and what a listing means by pier and beam.
- What a free foundation repair estimate includes: what a contractor's estimate visit covers and how it differs from a paid inspection.
Leveling and floors
Sloping floors and gaps under baseboards usually mean part of the house has dropped. These guides cover lifting it back and the lighter fixes for concrete outside.
- Foundation leveling: what leveling involves, how close to level a house can realistically go, and what follows the lift.
- Mudjacking: pumping a cement slurry under a sunken driveway, patio or walkway to raise it.
- Polyjacking vs mudjacking: foam versus slurry for lifting concrete, compared on weight, cure time and lifespan.
Drainage and watering
Water is the part of the problem you can often manage yourself. Keeping the soil around a slab at a steady moisture level limits how much the clay shrinks and swells.
- Foundation drainage: grading, gutters and drains that move water away from the beam.
- Foundation drainage pipe: the pipe types used around Houston homes and where they go.
- Foundation drain vs French drain: two drains that often get confused, and which problem each one solves.
- Soaker hose for foundation watering: how to set one up during dry months, how far from the slab, and how often to run it.
Insurance and buying a house
These questions come up when money or a sale is on the line, and the answers depend on the policy and the contract in front of you.
- Insurance and foundation repair: what a typical homeowners policy may or may not cover, and what to ask your insurer.
- Buying a house with foundation issues: what to check before you commit, and how a repair estimate fits into the negotiation.
Read your own policy wording first. Coverage varies a lot between policies, and only your insurer can say what yours pays for.
Costs
Cost is the question almost everyone asks, and it depends on the method, the number of piers, access and how far the house has moved. As a guide, a 2026 Houston Press article put most Houston repairs at $3,300 to $6,800, with each pressed concrete pier around $300 to $600. A written quote after a visit is the only real price.
- Foundation repair cost: the overall ranges and what pushes a job up or down.
- Foundation crack repair cost: sealing and injection prices for cracks.
- Pier foundation cost: price per pier by type.
- Foundation leveling cost: what lifting a house usually runs to.
- Slab foundation repair cost and pier and beam repair cost: prices for each foundation type.
- Foundation settling repair cost: what stabilizing a sinking section costs.
- Foundation leak repair cost: finding and fixing a leak under the slab.
- Foundation inspection cost: what an assessment or engineer's report costs before any work.
- Mudjacking cost: lifting sunken outdoor concrete.
- Foundation drainage systems cost and foundation watering system cost: the price of keeping the soil steady.
How do these guides fit with getting a quote?
The guides help you understand what you're seeing and ask better questions. They can't measure your house. Only a visit can show how far a slab has moved, where the low points are and which method fits. Use the guides to note your symptoms, take photos and write down when you first noticed them, then ask for an assessment.
Have these ready for the visit:
- Photos of each crack, with a coin or tape measure for scale, and the date you took them.
- A list of doors and windows that stick, and whether it changes with the seasons.
- Any earlier repair paperwork, warranty or engineer's report that came with the house.
In the City of Houston, foundation repairs show up in the city's weekly building permit reports, so permitted work is normal here. Ask whoever quotes whether your job needs a permit and who applies for it. You can also see how it works from your first message to the written quote, or check the areas we cover across Greater Houston.
If you have a question these guides don't answer, send it through our enquiries page and we'll point you to the right guide or arrange a visit. When you know you want a price, request a written quote.
Read on
- Acceptable cracks in concrete
Acceptable cracks in a concrete slab: the 3/16 inch builder threshold, the engineering severity scale, Texas warranty limits and how to…
- House leveling
Are uneven floors dangerous? The real risks in a Houston home, from trips and falls to failing supports, and the signs that mean it is…
- Buying a house
Thinking of buying a Houston house with foundation issues?
- Concrete foundation piers
How pressed concrete piers go in under a Houston slab, how deep they reach, how far apart they sit, where they fall short, and what…
- Concrete slab cracks
Why concrete slab cracks form in Houston homes, what a crack's age, shape and location tell you, and how each kind is repaired, from a…
- Corner cracks in walls
Why cracks form at the corners of doors, windows and ceilings in Houston homes, how to read the angle and width, and when a corner crack…
- Cracks in brick walls
Cracks in brick walls on Houston homes: which ones are mortar wear, which point to slab movement, and how repointing, sealing and brick…
- Cracks in concrete block
Why concrete block and cinder block walls crack, which patterns are serious, how to repair a mortar joint, and when a Houston block wall…
- Cracks in concrete walls
How to read cracks in concrete walls on a Houston home, which ones you can fill yourself, the right filler for each, and when a crack…
- Cracks in interior walls
How to map cracks in interior walls room by room, what the pattern points to in a Houston slab or pier and beam home, and when to book a…
- Cracks in plaster walls
Why lath and plaster walls crack, which crack patterns point to the house moving, and how to fix plaster cracks so they stay closed in an…
- Cracks in sheetrock walls
How to read cracks in sheetrock walls by where they run, which ones come from framing or humidity, which point to the slab, and how each…
- Diy foam foundation repair
Can you lift concrete or a Houston slab with a DIY polyurethane foam kit?
- DIY foundation piers
How to install helical piers and concrete piers yourself under a deck, shed or porch in Houston clay, and why piering a house is a…
- DIY foundation repair
Which foundation jobs a Houston homeowner can do alone, which need a permit and a contractor, and what DIY saves next to a professional…
- DIY mudjacking concrete
How to mudjack a sunken sidewalk or patio slab yourself: the grout mix, the pump, hole layout, the 1/4 inch lift rule, and where DIY…
- DIY pier and beam
Which pier and beam repairs you can do from the crawl space, how to sister a joist and seal ductwork, and where jacking and permits mean a…
- Home warranty and foundations
Why a Texas home warranty rarely pays for foundation repair, where it can help with a slab leak, and how builder and repair warranties…
- Insurance and foundation repair
Which parts of a slab leak repair a Texas homeowners policy pays for, how the 15% foundation endorsement works, why claims get denied, and…
- Drywall cracks from settling
How to confirm drywall cracks come from settling, why to wait until the house stops moving, and how to repair them so they stay closed in…
- Epoxy injection
How epoxy injection seals foundation cracks, which cracks it suits, how the work is done step by step, and why it fails on a Houston slab…
- Filler for cracks
Which filler suits a crack in drywall, plaster or a trim joint, how to fill it so it stays hidden, and which wall cracks in a Houston home…
- Fixing cracks in drywall
How to fix cracks in a drywall ceiling so they stay fixed: the overhead repair step by step, matching texture, and the ceiling cracks a…
- Fixing cracks in foundation
How to seal a crack in the outside edge of a Houston slab, which exterior cracks you can fix yourself, and the outside causes to correct…
- Foundation cracks when
Foundation cracks: when to worry on a Houston slab or pier-and-beam home.
- Foundation floor cracks
How to tell whether a crack in your tile, wood or vinyl floor comes from the foundation, how to check the slab underneath, and when a…
- Foundation heave repair
Foundation heave repair in Houston: why clay pushes a slab up, why it can't be pushed back down, and how a contractor levels the house…
- Cost per square foot
Is foundation repair priced per square foot?
- Foundation repair free estimate
What a free foundation repair estimate in Houston covers, what a written estimate should list, and typical costs for block walls, straps…
- Foundation root barrier
When a tree root barrier protects a Houston slab on clay, how deep and how far out it goes, what a kit can and can't do, and when to ask…
- Foundation signs of problems
The inside and outside signs of foundation problems in a Houston home, which ones are normal and which mean a slab or pier-and-beam house…
- Hairline cracks in walls
What a hairline crack in a wall really is, why Houston drywall and plaster get them, how to fix one so it stays hidden, and the few that…
- Helical pier foundation repair
How helical pier foundation repair works on a Houston house, step by step: how many piers you need, how capacity is checked, buying piers…
- Helical piers vs concrete
Helical piers vs concrete footings for a Houston porch, addition or raised house: depth, clay movement, curing, uplift, code rules and…
- House inspection foundation cracks
Your Houston home inspection flagged foundation cracks.
- House leveling pier
How a pier and beam house is leveled: the floor survey, the lift sequence, shims and new piers, tight crawl spaces, Houston costs and the…
- How to fix sticking doors
Find where a door rubs, tighten or shim the hinges, move the strike, free painted doors and plane only as a last resort.
- House leveling
How to fix uneven floors in a Houston home: find out if it's the subfloor or the foundation, what you can level yourself and when it needs…
- Getting an engineer's report
How to get a structural engineer report on a Houston house: finding a Texas PE, checking the license, what to ask for, cost ($500 to…
- Foundation drainage
How to install foundation drainage on a Houston lot: find the water, fix gutters and grade, then lay a French drain pipe with the right…
- Foundation watering and trees
Step-by-step: lay a soaker hose around a Houston slab, what parts to buy, how far out it goes, how to set the timer, and when a foundation…
- House leveling
How to level a floor in an old Houston house: map the slope, fix the supports underneath, then flatten the floor itself, and know where…
- House leveling
How to level an uneven concrete floor: measure the dips, grind the highs, pour self-leveling compound, and know when a Houston slab needs…
- Foundation cracks
How to repair a cracked foundation on a Houston slab or pier-and-beam home: sealing small cracks, fixing the drywall above them, and when…
- Air ducts in a slab
How damaged or collapsed air ducts inside a concrete slab are repaired: the signs, the materials, rerouting vs relining, and what a…
- Hydraulic cement for foundation
When hydraulic cement is the right filler for a foundation crack, how to set a plug that stays put, and why it fails on a Houston slab…
- House leveling
Why older Houston homes have sloping floors, how much slope engineers treat as normal, and the signs that a tilt is still moving and needs…
- Leveling house jacks
Which jacks level a house, how contractors use them on Houston slabs and pier-and-beam homes, what you can safely lift yourself, and where…
- Non-structural foundation cracks
The kinds of non-structural foundation cracks found in Houston homes, why they still let in water and termites, and how to seal and watch…
- Normal settling cracks
Normal foundation settling cracks in Houston homes: where they show up, why they change with the seasons, how to patch them, and when they…
- Pictures of normal cracks
Pictures of normal foundation cracks, described spot by spot for a Houston slab or pier-and-beam home, plus how to photograph your own…
- Pier and beam house skirting
How to choose and fit skirting on a raised Houston house: vinyl, metal, fiber cement, wood or brick, the vents the code asks for, and when…
- Plastic shrinkage cracks
Plastic shrinkage cracks in a concrete slab: how they form in the first hours, how to tell them from settlement, how to seal them and how…
- Repair cracks in exterior walls
How to repair cracks in exterior walls on a Houston house: stucco, siding and brick fixes, the right material for each, and when a crack…
- Repair crawl space foundation
How to repair a crawl space foundation in the right order: water first, then piers and beams, then vents, vapor barrier, skirting and…
- Sagging floor joist repair
How sagging floor joists are repaired under a raised Houston house: sistering, replacement, a new support beam or blocking, what fits the…
- Slab leak symptoms
The signs of a leak under a Houston slab, a two-hour meter test you can do today, how to tell hot, cold and drain lines apart, and when to…
- Sliding glass doors sticking
Why a sliding glass door sticks, how to clean the track and adjust the rollers, and the measurements that show when a Houston foundation…
- Stair step cracks
Stair step cracks in brick on a Houston house: how to read which part of the slab moved, how to track the crack through the seasons, and…
- Steel foundation shims
What steel foundation shims do, where they sit on slab and pier-and-beam homes, how they compare with wood, whether they rust, and when to…
- Steel piers
What steel piers are made of, how they're pressed under a Houston slab, how each one is proven to hold, rust in clay soil, and what the…
- Structural cracks in walls
How to tell a structural crack in a wall, what causes it in a Houston home, and the order the repair goes in: cause first, then framing,…
- Structural engineer foundation repair
What a structural engineer does in a Houston foundation repair: the evaluation, the report, the sealed repair plan, the cost and the final…
- Types of cracks
The main types of cracks in walls, from hairline drywall lines to stair-step brick cracks, which are cosmetic, and which point to a moving…
- Vertical hairline cracks
Why vertical hairline cracks show up in brick veneer on Houston homes, how to tell brick expansion from slab movement, and the right…
- Water through slab after rain
Why water seeps up through a Houston concrete slab after a storm, how to find where it gets in, what you can fix yourself, and when the…
- What wall cracks mean
What cracks in walls mean in a Houston home: whether the paint, the framing or the foundation moved, what a returning crack tells you, and…
- Piers foundation meaning
What piers foundation means on a Houston listing, an inspection report or a repair quote, and what each pier term tells you about the house.
- When to walk away
The foundation problems that should end a Houston house deal, the cost test to run, the Texas option period deadline, and when an owner…
- Wall crack worries
Which cracks in walls and ceilings need action today, which need a foundation check soon, and which you can safely watch through a Houston…
- Insurance and foundation repair
When a Texas homeowners policy pays for foundation repair, when it refuses, how a plumbing leak changes the answer, and what the repair…
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