Most foundation trouble in Montgomery starts with clay that swells through the wet winter and shrinks through the long hot summer, and it shows up as stair step cracks in brick, doors that drift out of square and crawl spaces that stay damp. Our tally of NRCS Soil Data Access mapping puts about 47 percent of the land inside city limits in soil units whose main soils rate high or very high for shrink and swell, led by Sumter, Oktibbeha and Vaiden clays that formed over chalk. BDry Alabama starts with a free inspection and a digital foundation scan, then its own crews install the piers, crack repairs, drainage or crawl space system the house actually needs.
The Encyclopedia of Alabama counts Montgomery County among the 17 counties traditionally called the Black Belt and explains that a formation known as the Selma Chalk underlies the Blackland Prairie at the heart of that region. You can see it in the city's soil map. When we clipped NRCS Soil Data Access mapping to the Census boundary of Montgomery, the most common soil inside city limits was Sumter, at about 14 percent of the land, followed by Oktibbeha and Vaiden at roughly 7 percent each and Faunsdale at about 4 percent.
The official NRCS descriptions say why that matters. Vaiden soils are very deep, somewhat poorly drained and very slowly permeable, formed in clayey sediments over chalk, and saturated within 1 to 2 feet of the surface for significant periods in winter and spring of most years. Clays like these swell hard when wet and crack open when dry. Not every street sits on them, though. Bama and Cahaba sandy loams on old stream terraces cover another large share of the city and barely move, so two houses a short drive apart can behave very differently, which is why we read the lot before recommending anything.
Census ACS 5 year estimates for 2023 count 94,157 housing units in Montgomery with a median year built of 1977. The 1970s are the biggest single decade, at 19,545 units or about 21 percent of the stock, and the 1960s add another 12,181. Roughly 22 percent of homes were built before 1960, including 6,280 from 1939 or earlier, and about 70 percent of all units are single family detached houses.
The older core grew fast. The Encyclopedia of Alabama notes that the city's population rose from 78,000 to 106,000 between 1940 and 1950, as neighborhoods such as Cottage Hill, Cloverdale and the Garden District filled in. A house from that era has had seventy or more years of seasonal clay movement under it, and where it sits over a crawl space, the piers, girders and sill plates have spent all those years over damp ground. Houses from the 1970s boom are now around fifty years old, which is the age when slab edges, brick veneer and patched cracks start telling a story worth measuring.
NOAA's 1991 to 2020 climate normals for the Montgomery airport station give the city 51.16 inches of precipitation a year. The three winter months bring 14.51 inches, March is the wettest month at 5.21 inches, and October is the driest at 2.87. The same station averages 92.7 days a year at or above 90 degrees, with a July normal high of 93.7, and 16.5 days a year bring an inch of rain or more.
Put that calendar on top of chalk derived clay and the pattern is predictable. Soil around the footings soaks up winter and spring rain and swells, then spends three hot months losing water to heat and tree roots, and the edges of the house dry faster than the middle. That is why new cracks, sticking doors and gaps at the trim tend to show up in Montgomery between August and October. A crack that opens in the fall and partly closes by spring is a sign of seasonal movement, so we record it with a scan instead of guessing from one visit.
Part of Montgomery's water problem is simply where water collects. The U.S. Geological Survey modeled Catoma Creek near Montgomery in a 2008 study for the city and found its simulated 100 year flood profile about 2.5 feet higher, on average, than the profile FEMA had published for the same 15 mile study reach. USGS keeps gauges on the creek at and near Montgomery for exactly that reason.
The soil map points the same way. In our tally of NRCS Soil Data Access data, at least 16 percent of the land inside city limits is in map units labeled as flooded or ponded, including frequently flooded Leeper and Sucarnoochee map units and ponded Una silty clay. Leeper, per its NRCS description, formed in clayey alluvium on Blackland Prairie flood plains. A foundation contractor cannot change a flood zone, and you should check yours on the FEMA Flood Map Service Center. What can be fixed is the groundwater and runoff that sit against a house after ordinary storms, with yard drainage, French drains, a sump pump or a sealed crawl space.
Census ACS puts owner occupancy at about 54 percent, or 43,705 of 80,540 occupied homes, so nearly half of Montgomery households rent and a repair often involves a landlord or property manager as well as the family living there. The median home value is $148,500, which means a pier job is a real share of what the house is worth, and owners want to know the smallest repair that will hold.
Houses also change hands here for reasons beyond the market. The Encyclopedia of Alabama notes that Maxwell Air Force Base's Air University employs several thousand people, and a household that moves on orders needs paperwork a buyer will trust. Two published BDry Alabama terms help with that. The digital foundation scan gives a buyer and an inspector real level readings rather than opinions, and a transferable warranty passes two years of coverage to the new owner when BDry is notified within 60 days of the sale. Financing through GreenSky includes a 15 month plan with no interest if paid in full in that window, subject to credit approval.
BDry Alabama's office is at 1490 Valley Drive in Bessemer, and Montgomery is part of its published service area. Calls go to 205 942 1976, Monday through Friday from 7 in the morning to 6 in the evening. The company's own Montgomery page makes the point that crawl space encapsulation, exterior drainage and foundation repair work best when they are planned together, and in a city with chalk clay, floodplain soils and older crawl spaces, that is usually how a job comes together.
The visit starts with what you have noticed, then moves outside to the gutters, downspouts and grading, and underneath if there is a crawl space. The foundation scan takes level readings every five feet and turns them into a color coded report, so you can see where the house dropped and by how much. You get a written plan and one price. Our crews install the work, and helical piers carry a warranty for the life of the structure against further vertical settlement.
Stair step cracks in brick or block, a horizontal crack across a basement wall, or a crack that reopens after it was patched.
A door that no longer latches or a window that binds usually means the framing around it has moved.
A marble that rolls, a gap under a baseboard, or a floor that gives over the crawl space.
A damp basement wall, a puddle at the floor edge, or standing water in the crawl space.
Damp air from a crawl space or basement drifts up into the living space.
Puddles that sit beside the foundation for a day or more after a storm.
About 47 percent of Montgomery's land is mapped in high or very high shrink swell soils by our NRCS tally, so seasonal footing movement is the most common foundation complaint in the city.
Sumter, Oktibbeha and Vaiden clays over chalk keep swelling and shrinking near the surface, and a helical pier reaches load bearing soil below that active zone, with torque confirming capacity as it goes in.
Cracks tend to open between August and October after Montgomery's 92.7 days a year at or above 90 degrees dry the clay, so measuring whether a crack is seasonal or still growing comes first.
Older raised floors over slowly draining clay that NRCS describes as saturated in winter and spring are prime candidates for a sealed crawl space in Montgomery.
Very slowly permeable Blackland Prairie clays hold rain at the surface, so moving roof and yard water away from the foundation is often the cheapest fix in Montgomery.
With a median year built of 1977 and about 22 percent of homes older than 1960, sagging floors over Montgomery crawl spaces often trace to beams that need adjustable support underneath.
Homes on low ground near Catoma Creek and on floodplain soils such as Leeper and Una collect groundwater after storms, and a sump gives that water a way out.
Driveways, patios and garage slabs poured over swelling clay settle unevenly, and BDry lifts sound slabs with high density polyurethane foam instead of replacing them.
These are typical installed ranges from HomeGuide's 2025 and 2026 national cost guides, the same figures on each service page, not BDry Alabama prices. A free inspection in Montgomery sets one written price.
| Project | Typical installed range |
|---|---|
| Foundation Repair | $4,500 to $20,000 typical settling or sinking foundation repair, installed |
| Helical Piers | $2,000 to $4,000 typical cost per helical pier for foundation repair, installed |
| Foundation Crack Repair | $250 to $800 typical cost per crack, epoxy or polyurethane injection |
| Basement Waterproofing | $6,000 to $18,000 typical basement waterproofing project, installed |
| Crawl Space Encapsulation | $3,000 to $15,000 full crawl space encapsulation, installed |
| Yard Drainage | $1,000 to $4,000 typical yard drainage project, installed |
| French Drains | $500 to $8,800 typical yard or curtain French drain, installed |
| Concrete Lifting | $700 to $5,000 typical concrete leveling job, installed |
Runoff from a public street, ditch or storm inlet belongs to the city. Report it to Montgomery public works or engineering first.
A low spot in the middle of the yard is a grading and landscaping job, often fixed with soil and seed or a swale.
When puddles hug the house, the crawl space gets wet or the basement leaks, call a foundation and waterproofing company. That is the work BDry Alabama does: grading at the house, downspout lines, French drains and interior drainage. Yard drainage costs and options.
Foundation Repair in Montgomery, AL typically costs $4,500 to $20,000 for a settling or sinking foundation, according to HomeGuide's February 2026 foundation repair guide. A single helical pier runs $2,000 to $4,000 installed, and a single crack repair runs $250 to $800. Census ACS estimates put the median Montgomery home at 1977, with about 22 percent built before 1960, and older houses tend to need more piers and more drainage work. BDry Alabama publishes no chart price: a free inspection with a digital foundation scan sets one written number for your house.
In much of the city, yes. When we clipped NRCS Soil Data Access mapping to Montgomery's Census boundary, about 47 percent of the land fell in soil units whose main soils rate high or very high for shrink and swell, and about 17 percent rated very high. The leaders are Sumter, Oktibbeha and Vaiden, all Blackland Prairie soils that formed in clays over chalk; the Encyclopedia of Alabama ties that chalk to the Selma Chalk under the Black Belt. The rest of the city is mostly sandy loam on old river terraces, such as Bama and Cahaba, which moves very little. Your own lot can fall on either side of that line, so the inspection checks the soil around your house rather than assuming.
Because that is when the clay is driest. NOAA's 1991 to 2020 normals for the Montgomery airport station show October as the driest month at 2.87 inches, after a summer that averages 92.7 days at or above 90 degrees. Clay that swelled with 14.51 inches of winter rain shrinks back over those months, and the soil at the edge of the house dries before the soil under the middle, so a corner can lose support. Doors that stick, diagonal cracks over windows and stair step cracks in brick often appear from August to October. Some of that movement reverses in spring. BDry Alabama's digital foundation scan records readings every five feet, so a second scan later can show whether the house is still moving.
It changes the water side of the picture. A 2008 U.S. Geological Survey study of Catoma Creek near Montgomery found that its modeled 100 year flood profile ran about 2.5 feet higher, on average, than the profile FEMA had published for the 15 mile study reach. That study was meant to guide floodplain planning and development, and it is a good reason to look up your property on the FEMA Flood Map Service Center before you buy or build. Even outside a mapped flood zone, low lots and floodplain clays hold groundwater after storms. Our inspection looks at where water sits around the house and whether yard drainage, a French drain, a sump pump or crawl space work will keep it off the foundation.
You are in good company. Census ACS 5 year estimates for 2023 put Montgomery's median year built at 1977, with 19,545 homes, about 21 percent of the city's housing, built in the 1970s alone. At around fifty years old, the usual things to check are the slab or crawl space edges where clay movement concentrates, brick veneer cracks above doors and windows, sill plates and joists over a damp crawl space, and gutters and downspouts that empty right at the wall. Many of these houses have also had a crack patched once or twice. A patch that keeps reopening means the movement has not stopped. A digital foundation scan with readings every five feet gives you a baseline for future comparisons.
Often they do, because the air and the ground both work against them. NOAA's 1991 to 2020 normals give the Montgomery airport station a July normal high of 93.7 degrees, and humid summer air that drifts through foundation vents condenses on cool ducts and framing. Underneath, NRCS describes Vaiden and Faunsdale soils as saturated within 1 to 2 feet of the surface for significant periods in winter and spring. The EPA's mold guide recommends keeping indoor humidity below 60 percent. Encapsulation covers the ground and walls with a sealed vapor retarder, closes the vents and usually adds a dehumidifier. BDry Alabama's published warranty covers encapsulation systems for the life of the structure against material and workmanship defects.
No. The office is at 1490 Valley Drive in Bessemer, and Montgomery is listed among the service areas on bdryalabama.com. You can call 205 942 1976 Monday through Friday from 7 in the morning to 6 in the evening, or use the form on the website. The inspection is free, and you leave with a written plan and one price. If the repair cannot wait, financing is offered through GreenSky and Upgrade, including a 15 month GreenSky plan with no interest if paid in full within 15 months, subject to credit approval. For ongoing upkeep, the BDry Elite Silver plan costs $349 a year and the Gold plan $595 a year, and Gold adds an annual digital foundation scan.
Montgomery is in Montgomery County. ZIP codes inside city limits: 36104, 36106, 36107, 36108, 36109, 36110, 36111, 36112, 36113, 36115, 36116, 36117. Nearby Montgomery and East Alabama cities we also serve: Prattville, Auburn, Opelika. See also BDry Alabama in Montgomery on our main site.
BDry Alabama
1490 Valley Drive, Bessemer, AL 35022
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