JLB Basement Waterproofing & Foundation Repair in Marshalltown
Serving Marshalltown and Marshall County with 4 specialized foundation and waterproofing services. Local expertise. Permanent solutions. Free inspections.
Solutions That Last the Life of Your Home
Every foundation problem has a permanent fix. We use engineered systems — not quick patches — backed by transferable warranties and decades of field experience.
Foundation Repair
Steel push piers and wall anchors to stabilize and lift settling foundations. Stop the cracks, level the floors, save the home.
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Basement Waterproofing
Interior drainage systems, sump pumps, and vapor barriers to keep your basement permanently dry. No more water. No more worry.
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Crawlspace Encapsulation
Full encapsulation with spray foam for BOTH crawlspace and basement — twice the protection competitors offer, at a lower cost.
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French Drains & Drainage
French drains, extended downspouts, regrading, and drain pipes to redirect water away from your foundation permanently.
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Foundation Wall Replacement
Complete removal and reconstruction of severely damaged foundation walls with new reinforced concrete, drainage, and waterproofing.
Learn MoreWhat Foundation and Waterproofing Services Are Available in Marshalltown?
Marshalltown is a close-knit community of about 28000 in Marshall County. The homes here may not number in the tens of thousands, but they sit on the same aggressive clay soil that affects the entire Des Moines region — and they face the same foundation and waterproofing challenges as any home in the metro.
Most of Marshalltown's housing is relatively recent: Predominantly 1940s-60s residential stock with a significant historic core that survived or was rebuilt post-2018 tornado.. The dominant foundation types are concrete block basement and stone foundation and poured concrete basement, which are stronger than older methods but still vulnerable to Marshall County's soil. Marshalltown's proximity to the Iowa River leads to high soil saturation. Fluctuating temperatures and heavy rainfall create 'stair-step' cracks in the older block foundations common in the central neighborhoods.
Located along the Iowa River; characterized by flat floodplains and gentle uplands. Proximity to water means higher water tables and more hydrostatic pressure on foundations. JLB provides 4 specialized services to Marshalltown homeowners — from foundation stabilization to drainage systems — each designed for the unique soil and moisture conditions here. Every job begins with a free inspection.
Marshalltown at a Glance
Where Does JLB Serve in Marshalltown, IA?
JLB provides foundation repair and waterproofing throughout Marshalltown and the surrounding Marshall County area. Our crews know every part of this community.
What Foundation Types Are Common in Marshalltown?
The homes in Marshalltown sit on a range of foundation types, each with its own vulnerabilities. Here's what our crews see most often in Marshall County.
Concrete block basement
Concrete block basements in Marshalltown use hollow-core masonry that's inherently weaker than poured concrete under lateral loads. The expansive clay in Marshall County presses against these walls every wet season, and over time the cumulative stress shows up as cracking, bowing, or step-pattern fractures.
Stone foundation
Marshalltown's oldest homes often sit on limestone or stone foundations — hand-laid masonry that predates modern engineering. These walls are porous, the mortar is lime-based, and decades of Marshall County's clay pressure have taken a toll. Water intrusion, mortar deterioration, and inward leaning are common.
Poured concrete basement
Poured concrete basements dominate Marshalltown's newer housing. These walls are stronger than block but develop shrinkage cracks during curing that become water entry points later. In Marshall County's clay soil, hydrostatic pressure exploits every imperfection — especially during the spring thaw and heavy rain seasons.
What Warning Signs Should Marshalltown Homeowners Watch For?
Catching foundation and waterproofing problems early saves thousands of dollars in repairs. If you see any of these in your Marshalltown home, it's time to call for a free inspection.
Cracks along mortar joints in Marshalltown's older stone foundations, where decades of soil movement have weakened the original masonry
Learn about Foundation Repair →Water seeping through porous stone walls or mortar joints — common in Marshalltown's older homes during spring rains and snowmelt
Learn about Waterproofing →Musty odors, mold, or sagging floors above crawlspaces — in Marshalltown's low-lying areas, ground moisture rises into the crawlspace and affects the entire home
Learn about Crawlspace Encapsulation →Doors or windows that suddenly stick or swing open — even newer Marshalltown homes experience this when soil settlement shifts the foundation
Learn about Foundation Repair →Who Is the JLB Team Serving Des Moines?
Numbers That Speak for Themselves
Even Newer Marshalltown Homes Get Foundation Problems
Modern construction doesn't make your home immune to Marshall County's clay soil. Settling, cracking, and water intrusion affect homes of all ages. If you're seeing the signs, our free inspection will give you clarity — and honest pricing if anything needs fixing.
Not Sure What You're Dealing With?
Click any symptom below to learn what it means, what's likely causing it, and how we can help. Most of these are more common — and more fixable — than you'd think.
Diagonal, stair-step, or horizontal cracks in drywall, plaster, or brick usually trace back to soil movement beneath your foundation. The heavy clay soils in the Kansas City and Des Moines metros expand and contract seasonally, which can shift your foundation over time. The good news: this is very fixable with the right approach.
Water entering through floor joints, wall cracks, or seeping through porous concrete means groundwater pressure is pushing moisture into your basement. An interior drainage system and sump pump can solve this permanently — and we can usually have it done in a day or two.
When a foundation settles unevenly, it can shift your home's frame just enough to make doors and windows bind. This is one of the earlier signs of foundation movement — and catching it early often means a simpler, less expensive repair.
That musty smell is moisture. Up to 40% of the air in your home rises from below — from your crawlspace and basement. If there's excess humidity down there, it affects your whole home. Encapsulation seals it out, and you'll notice the difference in your air quality right away.
Floors that slope toward the center or an exterior wall usually mean the support structure underneath needs attention. Push piers can stabilize your foundation and often lift it back to level — giving your floors a second life.
When soil washes out or compacts beneath a concrete slab, the slab drops and becomes uneven. Polyjacking uses expanding polyurethane foam to fill the void and lift the concrete back to grade — usually in under a day, with no heavy equipment needed.
Water collecting near your foundation means your grading or drainage isn't directing water away effectively. French drains, regrading, extended downspouts, and drain pipes can redirect water away from the house — protecting your foundation for the long haul.
A basement wall that has bowed more than 2 inches inward, shifted off its footing, or shows multiple structural cracks may have moved beyond what bracing can fix. When carbon fiber straps, I-beams, or wall anchors are not enough, the wall needs to be removed and rebuilt with reinforced concrete. This is the last resort — but it is the permanent fix when the wall itself is compromised.
Why Do Marshalltown Homeowners Choose JLB?
Iowa Licensed & Marshall County Experienced
We're fully licensed in Iowa and experienced with Marshall County's building requirements. Permit applications, structural inspections, code compliance — we handle the process so you don't have to learn it.
Dedicated Crew, Start to Finish
In Marshalltown, you get the same team from the first inspection through the final walkthrough. No subcontractors, no handoffs between crews. One team that knows your project inside and out.
Stone and limestone Experience
Marshalltown's stone and limestone foundations require specific repair techniques that differ from modern poured concrete. Our crews are trained in wall stabilization, pier installation, and masonry-specific methods designed for these older construction types.
Straightforward Pricing
We give Marshalltown homeowners a clear written estimate with no hidden costs. If financing helps, we have flexible plans available — but either way, you'll know exactly what the project costs before we start.
What Marshalltown ZIP Codes Does JLB Serve?
What Our Customers Say
"We had cracks running up our walls and doors that wouldn't close. JLB came out, explained exactly what was happening with the soil under our house, and had the piers installed in two days. Floors are level again. Wish we hadn't waited so long."
"Three other companies gave us the runaround. JLB showed up, did a thorough inspection, and gave us a straight answer. The repair held up through an entire Missouri winter with zero new cracking."
"Our crawlspace was a mess — moisture, mold, the works. JLB encapsulated it AND spray-foamed our basement in the same project. The difference in our home's air quality is incredible. Great value for the price."
Real Team. Real Work.
Right Here in Kansas City & Des Moines.
Real Projects. Real Results.
Every photo is from an actual JLB job site — not a stock photo. See the work we do every day across Kansas City and Des Moines.
Foundation Repair in Marshalltown — FAQ
The most common issues we see in Marshalltown are wall cracks (mortar deterioration and inward leaning in stone walls), basement water intrusion, uneven or settling floors, and doors or windows that stick. Marshalltown's proximity to the Iowa River leads to high soil saturation. Fluctuating temperatures and heavy rainfall create 'stair-step' cracks in the older block foundations common in the central neighborhoods. All of these trace back to how Marshall County's expansive clay interacts with the specific foundation types in your neighborhood.
Many of Marshalltown's homes date to the Predominantly 1940s-60s residential stock with a significant historic core that survived or was rebuilt post-2018 tornado. and sit on stone and limestone foundations. These older construction methods are more susceptible to Marshall County's clay pressure than modern poured concrete. However, they're absolutely worth repairing — modern engineering solutions like push piers, wall anchors, and carbon fiber reinforcement can stabilize and extend the life of these foundations for decades.
Yes. Located along the Iowa River; characterized by flat floodplains and gentle uplands. Higher water tables mean more persistent hydrostatic pressure against basement walls, and clay soil near waterways stays saturated longer. Marshalltown homes in low-lying areas or near creeks often face more severe waterproofing challenges than homes on higher ground.
Foundation repair costs in Marshalltown vary widely based on the scope of damage and the solution needed. Minor crack repairs may cost $500-$2,000. Pier installation for settling foundations typically ranges from $5,000-$15,000. Full waterproofing systems run $3,000-$12,000. We provide free inspections with detailed, written estimates — no surprises and no pressure.
JLB provides 4 services to Marshalltown homeowners: foundation repair (push piers, wall anchors, carbon fiber), basement waterproofing (interior drainage, sump pumps, crack injection), crawlspace encapsulation (spray foam + vapor barriers for both crawlspace and basement), and French drain installation with grading and downspout work. Every service starts with a free inspection.
A JLB technician visits your Marshalltown home and examines the foundation inside and out — checking for cracks, wall movement, floor levelness, moisture, and drainage. For concrete block basement foundations common in Marshall County, we look for the specific failure patterns associated with that construction type. The inspection takes about 45 minutes and ends with a clear explanation of what we found, what (if anything) needs repair, and exactly what it costs. There's no obligation.
Get Your Free Foundation Assessment in Marshalltown
Even newer Marshalltown homes are affected by Marshall County's clay soil. Fill out the form for a free inspection — we'll assess your foundation, identify any issues, and give you honest pricing if anything needs fixing.
Get Your Free Inspection
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Our Locations
We're always close enough to help — our crews are local to your area.
JLB Basement Waterproofing & Foundation Repair — Des Moines
97 Indiana Ave Suite #1Des Moines, IA50314(515) 444-9234 View on Google Maps
Stop the Damage. Get Answers Today.
A free inspection takes 45 minutes and tells you exactly what's going on under your house — and exactly what it takes to fix it.