Foundation Repair, Basement Waterproofing & Gutter Installation in Sioux City, IA

Does your home or commercial property have bowing foundation walls, uneven concrete, leaky windows in the basement, or dysfunctional gutters? There is no reason to worry — Thrasher Foundation Repair is your trusted expert, providing solutions for these problems and so much more since 1975.

Contact Thrasher Foundation Repair to schedule a free inspection and cost estimate on any of our reliable services, including basement waterproofing, gutter installation, foundation repair, crawl space encapsulation, and concrete repair. We proudly serve Sioux City, IA and nearby areas.

Testimonials From Sioux City
We called Thrasher because we understand that we need to do something to keep the problem from getting worse...
Testimonial by Connie G. from Sioux City, IA
“The Thrasher crew was very professional and careful when working. The install was painless because of...
Testimonial by Evan G. from Sioux City, IA
I'm very happy with the work.
Testimonial by Tonya H. from Sioux City, IA
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Durable foundation repairs in Sioux City

No matter how small the foundation damage may seem, problems can worsen and impact other areas of a home or building, leading to issues like sticking windows and doors, cracked drywall, a tilting chimney, and moisture intrusion. From cracked foundation floors to bowing basement walls and foundation settlement, Thrasher Foundation Repair provides permanent solutions for these structural problems and more.

Foundation Problems We Fix:

  • Foundation settlement & sinking
  • Sticking windows & doors
  • Tilting chimneys
  • Tilting & bowing walls
  • Cracked foundation walls & floors
  • Collapsing retaining walls
  • Sagging crawl space
  • Uneven floors

Our Foundation Repair Products:

  • Crawl space support posts
  • Push piers & helical piers
  • Wall anchors
  • Street creep repairs
  • Foundation wall brace & beams
  • Carbon fiber wall straps
  • Foundation settlement repair
  • Foundation crack repair

Schedule a free foundation inspection and service estimate to get personalized repair solutions for your property. We proudly serve Sioux City and nearby areas in Iowa.

Lasting basement waterproofing system in Sioux City

If your home or building has damp walls, excess condensation, mold, or other moisture intrusion problems, contact the basement waterproofing experts at Thrasher Foundation Repair.

We can eliminate basement flooding and leaking with a patented waterproofing system customized to suit any property, creating a dry below-grade space and keeping it that way for years to come! We proudly serve Sioux City and nearby areas in Iowa.

Schedule a free basement waterproofing inspection and service estimate to learn more. We proudly serve Sioux City and nearby areas in Iowa.

Our basement waterproofing system includes:

  • Interior drainage systems
  • Sump pumps
  • Mold treatment
  • Dehumidifiers

Crawl space repair & encapsulation services in Sioux City

Do you have a musty, wet, and humid crawl space in your home or building? Don’t deal with the mess on your own. Contact the crawl space encapsulation and repair professionals at Thrasher Foundation Repair! We provide a suite of crawl space solutions designed to create a drier, more secure area, including a moisture-proof vapor barrier, crawl space doors, crawl space support jacks, and more.

Concrete repair & concrete leveling experts in Sioux City

If you’re tired of sinking, cracked driveways, pool decks, sidewalks, or other concrete slabs around your property, contact the concrete repair professionals at Thrasher Foundation Repair. We offer simple, innovative solutions that are far superior to the standard mudjacking or concrete replacement. Our cracked concrete repair, concrete leveling, and concrete sealing systems install with no mess and no stress. Plus, they are quick to cure, so you can use your slabs soon after installation.

Never worry about UV rays, debris, gas, water, or other liquids ruining your slabs. Our solutions are incredibly durable and address the underlying cause of concrete damage, meaning you get lasting results that save you money!

Schedule a free concrete repair estimate to learn more. We proudly serve Sioux City and the surrounding areas.

Our concrete repair solutions:

  • PolyLevel®® concrete leveling
  • NexusPro® cracked concrete repair
  • SealantPro® concrete sealing
  • Commercial concrete repairs
  • Driveway repairs
  • Pool deck leveling
  • Sidewalk repairs
  • Step repairs

Your Local Gutter Installation and Repair Experts

If you’ve got leaky, clogged, overflowing, hanging, or pulling-away gutters, then it’s time to call Thrasher Foundation Repair. We’re your local gutter installation, gutter replacement, and gutter cleaning experts, offering a suite of gutter technologies that can serve your home’s every need.

Traditional gutters are open and exposed to the elements. Seams between aluminum gutter pieces can catch traveling debris, creating clogs of leaves, twigs, and all manner of falling materials. Clogs affect the performance of your gutter system, causing overflows and improper drainage that can pose a danger to both your roof and foundation.

Our gutter systems are customized to fit the exact needs of specific homes. We install seamless, durable aluminum gutters with flow-reducing perforated hoods, six-inch drainage troughs, and a slew of technologies guaranteed to perform at the highest level. Our expert gutter installers have decades of experience in the field, leveraging a deep pool of knowledge to give your home the best gutters in the industry.

We offer no-cost, no-obligation estimates in Sioux City. Our experts are standing by - give us a call today!

Gutter Problems We Fix:

  • Leaking gutters
  • Clogging gutters
  • Gutters pulling away from your home
  • Rusted, aging, generally decaying gutter systems
  • Downspout flooding

Our Gutter Products & Solutions:

  • Seamless aluminum gutters
  • Gutter guards
  • Downspouts and downspout extensions
  • Custom-designed gutter systems

The Thrasher Difference.

No matter the job - we aren't going to feel good about the hard work we've done until you're happy. So we'll do it right or make it right. That's the Thrasher promise.

For the last 45 years in the basement and foundation repair industry, we've focused on the value of doing whatever it takes to get the job done and "wow" our customers every step of the way.

Explore The Thrasher Difference

Before and after pictures from Sioux City

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Case Studies From Sioux City
The foundation of a building on the campus of Western Iowa Tech Community College (WITCC) was in trouble. One end of the building seemed to be...
The garage had settled 3 inches at the lowest point. By installing resistance piers, Thrasher corrected the foundation settlement. The homeowner...
Recent job requests in Sioux City, IA

Neighborhood: So Cypress, Sioux City, 51106

3 sections of sidewalk need to be raised. Concrete in good shape.

Neighborhood: Sioux City, 51105

House is settling in middle. And water coming in high humidity levels. Need to level floors and new beams possible concrete work..

Neighborhood: Sioux City, 51106

When there is heavy rain we get seeping water in the basement.

Neighborhood: S Cecelia St., Sioux City, 51106

My gutters are trashed and need to be replaced.

Neighborhood: Tiger Drive, Sioux City, 51106

Concrete sinking on front and back patio

Neighborhood: Goldie Ave, Sioux City, 51109

Foundation pulling away from ceiling in basement, causing other various issues upstairs, would like an estimate done.

Neighborhood: Fieldcrest Drive, Sioux City, 51103

A section of our driveway has sunk a little due to the way our gutters are set up. There are also some small cracks in the foundation I'd like you to look at.

Neighborhood: Hiawatha Trail, Sioux City, 51104

Free inspection

Neighborhood: Sioux City, 51104

Cracking upstairs window. Also some cracking basement walls

Neighborhood: Hiawatha W, Sioux City, 51104

Water coming through foundation wall in basement bathroom

Neighborhood: Fieldcrest Drive, Sioux City, 51103

Neighborhood: Ridge Ave, Sioux City, 51106

Water in my basement. Would like a quote on possible repair or waterproofing.

Neighborhood: Sioux City, 51104

Service: Water in my basement

Neighborhood: Sioux City, 51106

Front sidewalk has a dip and needs to be raised up. Looking for estimate.

Neighborhood: Sioux City, 51103

Basement has been flooding

Neighborhood: Geneva Street, Sioux City, 51103

I have a leveling needed in my driveway, a patio along side of my deck on the side of the house and the concrete slab that steps are sitting on top of out front of the house.

Neighborhood: Sioux City, 51106

Service: Water in my basement

Neighborhood: Myrtle, Sioux City, 51103

Wet when it rains

Neighborhood: Sycamore Terr, Sioux City, 51104

Front concrete patio entrance sinking towards house. Also sidewalk in the front of patio is sunk a pools water when it rains.

Neighborhood: Nordic Ct, Sioux City, 51104

Driveway is sinking
Job Stories From Sioux City, IA
Production team out training!

The production team is out training with our products!

Production team out training! - Photo 1
Thrasher team builds an obstacle course

The Sioux City team built an obstacle course for Contact Front, a nonprofit organization helping veterans transition from military life to civilian life.

Thrasher team builds an obstacle course - Photo 1
Having Fun in Training

Team member John was poking fun at a picture of himself during PowerBrave training. 

Having Fun in Training - Photo 1
Starting A Concrete Lift Job

Very sunken concrete in Sioux City before we lifted it!

Starting A Concrete Lift Job - Photo 1
Waterproofing in Sioux City, IA

This family bought their home a year ago and just noticed water coming in. They knew of Thrasher and our reputation, so they gave us a call. System Design Specialist, Jordan Comstock, came out to meet with them. Jordan did his inspection, and found the grading was allowing water to come back towards the home. The control joints were not sealed and allowed a lot of the concrete to settle. Downspouts were only a few inches away from the home, which was allowing water to come back to the foundation. To permanently fix this issue, Jordan proposed we install our waterproofing system, WaterGuard partnered with our TripleSafe sump, buried downspouts, and NexusPro to seal the joints in their concrete. WaterGuard is our drainage system that collects water coming in from the cold joint and sends it to the sump pump. The family loved this solution as they can stop these small problems before it turned into a bigger one. There is no doubt they will not have to worry about water in their basement again. 

Gutter Guards in Sioux City, IA

We are very happy the way things went and happy we don't have to climb a ladder to clean our gutters anymore. 

Gutter Guards in Sioux City, IA

This homeowner was elderly, and did not need to be climbing up his ladder to clean out the gutters. His family was worried as a neighbor down the street was had fallen off his ladder. They had been thinking about it for a long time, but knew it was time to get it looked at. We had been out to waterproof their basement, so they knew they could trust us. They gave us a call and System Design Specialist, Stephen Edgar, came out to meet with them. Stephen did his inspection, and saw they had wire mesh on the gutters. After a big snow storm the guards had failed, allowing lots of leaves in causing the gutters to clog. Stephen knew we had the perfect product for them. He proposed we install our RainDrop to their gutters. RainDrop can attach to almost any universal gutter, and it is durable preventing any leaves or debris to get into the gutters. The homeowner loved this solution and their family loved he would not be up on a ladder anymore. There is no doubt this family has the peace of mind they were looking for. 

Gutter Guards in Sioux City, IA

Laura has been living in her home for a long time and knew she had issues with her gutters clogging. She wants to keep living in this home for a while and doesn't want to keep worrying about it. She has worked with us in the past, so she knew she trusted us and wanted us back out. System Design Specialist, Taylor Wooten, came out to meet with her. Taylor did his inspection, and noticed there was damage to the existing gutter protection, which was not allowing the water to drain properly. Taylor proposed we install our Raindrop gutter protection. It is our durable gutter guard that helps keep debris and leaves out of the gutters. The Laura loved this solution and we sent out our installation team. There is no doubt Laura does not have to worry about her gutter clogging anymore! 

Driveway Repair in Sioux City, IA

This homeowner was wanting to maintain the value of her home. She is planning on moving down the road, and wanted to ensure she gets full retail value out of her home. She did not want to replace either. She called Thrasher because she was impressed with our professionalism and loved our 5 year warranty on her driveway. System Design Specialist, Corey Little, came out to meet with her about this issue. Corey found her driveway was starting to settle and crack in a few areas due to the soil not being reliable enough to hold it in place. This was due to poor soil compaction and open joints allowing water to wash away or weaken the soil. Corey went back to the homeowner with these findings, and together they decided on using our Two Part Concrete Protection System. We used Polylevel foam to lift the areas in the driveway  and stabilize the rest of the driveway to prevent any further settlement. After the lifts were completed, we used our caulking, NexusPro to seal the joints and cracks in her driveway to prevent water from traveling underneath. She loved the solution and the warranty, so we sent out our installation team. There is no doubt this homeowner and future homeowners will have the peace of mind they need! 

Large Concrete Repair Job in Sioux City, IA

There were many tripping hazards happening at this Air Base. Most of them happening on the walkway. They needed someone to come help them fix these issues, as they did not want anyone to trip, fall, or get hurt. They called on Thrasher because they knew of Thrasher's great warranties. They knew if anything were to happen again, they would have someone to call. They also knew if they would get these panels replaced, they would probably just settle again. One of our System Design Specialists, Corey Little, came out to meet with them. Corey explained to them that the soil was the issue. Water had gotten under, then a drought, which shrunk the soil and left a void for the concrete to drop. Corey proposed using PolyLevel to lift these slabs back up into place and permanently stabilize them. Our PolyLevel is a foam that is waterproof. It is injected under the concrete, lifts the concrete, then hardens. This makes it stay in place and the water won't wash it away. They were very pleased with how well the concrete lifted. They were also very pleased that Thrasher took the extra step to caulk the larger faps in some of the slabs for them. We were proud and honored to do this work for the Air Base! 

Full Basement Waterproofing in Sioux City, IA

The customer was remodeling this home to sell to some people he knows. He wanted to make sure the basement would stay dry and that the water issues he experienced with the home doesn't cause future problems for them. Water would get into the basement when we got heavy rain. He would have to push the water over to the drain to get it out of the basement.

We used our WaterGaurd system all the way around the basement to ensure the whole thing would stay dry all the time. We put in full height clean space to limit the amount of water vapor getting into the home. We also used our triple safe pump to make sure they won't have to deal with the stress of a sump system failure. 

He enjoyed that our system would guarantee the basement space to be dry. He knows the quality work we put into homes and know we will make sure the new homeowners will have no problems. The new homeowners and he also liked that the 25-year warranty would transfer over to them.

We were able to meet with the current and future homeowners and they worked so well together to design a system that would fully take care of their needs. They were so happy that we can make sure the basement always stays dry and it won't be a problem for them. The future homeowner was worried the moisture would cause health concerns for their family. 

Full Basement Waterproofing in Sioux City, IA - Photo 1
Pool Deck Concrete Leveled in Sioux City, IA

A homeowner in Sioux City, IA was having trouble with uneven concrete around the pool. The concrete had significant settlements and created a major tripping hazard. The crew used a combination of PolyLevel and NexusPro Joint Sealant to level the concrete and close the exposed joints, creating a smooth and even surface, eliminating any tripping hazards. 

Wall Crack in Sioux City, IA Fixed with PowerBraces

New homeowners in Sioux City, IA just moved into their home and were concerned about a wall crack. Upon inspection of the home before the sale, they were told to keep an eye on it. Worried that the crack would get worse they decided to give Thrasher a call.

Our crew went out and upon inspection found one of the walls was in stage 2 of wall failure. We installed PowerBraces on the wall permanently stabilizing the wall and giving it the support, it needs.

Crawl Space Encapsulation in Sioux City, IA

These homeowners in Sioux City, IA noticed cold and hot air entering the inside of their home during each season. In the winter, cold air was seeping through the basement and floors above making it costly to heat the home. During the summer, hot and humid air was leaking into the basement making it an uncomfortable space to be in. All these negative effects are caused by a poorly insulated crawl space. The homeowners wanted to protect their home and knew over time it could lead to mold and rot. The customer called Thrasher and was impressed with our thorough inspection and detailed solution. They chose our solutions because they knew it was going to be the best permanent fix.

 System Design Specialist Corey Little and our team arrived at the Sioux City home and immediately began work on the crawl space encapsulation. Our team started by installing SilverGlo insulation to reflect and trap the heat in the crawl space. That was then paired with our CleanSpace waterproof liner to limit the amount of water vapor that can enter the space, and keep it dry to prevent mold and foul odors. These two products together provide a permanent solution for crawl space insulation.

 The customers were pleased with the efficiency, professionalism, and communication displayed by the team. In addition, they were impressed with the quality of work, and happy to have a peace of mind moving forward through the seasons.

Sioux City, IA Foundation Stabilized with Push Piers

Long-time homeowners were looking to sell their home but noticed that they were having trouble with the foundation. Cracks starting to appear in the drywall, floors and back patio. Looking for solution they decided to call Thrasher.


We were able to install Push Pier’s to stabilize the home. We attached the Push Piers to the footings of the home, stabilizing the foundation and prevent further settlement from occurring.

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