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Products & Services
Basement Repair Products
WaterGuard Water Control
DryTrak Drainage Channel
TrenchDrain Drain Grate
IceGuard Discharge Line
FlexiSpan Wall Crack Repair
WellDuct Window Drainage
BrightWall Panels
ThermalDry Wall Barrier
SuperSump Pump System
TripleSafe Pumping System
UltraSump Battery Back Up
SaniDry Dehumidifier
Crawl Space Products
CleanSpace Encapsulation
Turtle Access Hatch
EverLast Crawlspace Doors
SaniDry CSB Dehumidifier
SmartDrain Water Drainage
SilverGlo Wall Insulation
TerraBlock Floor Insulation
SmartSump Sump Pump
Crawl-O-Sphere Fan
SmartVent Flood Vents
Foundation Repair Products
Geo-lock Wall Anchors
Geo-lock Helical Anchors
PowerBrace Wall Repair
CarbonArmor Wall Repair
SmartJack Floor Supports
PolyLevel Concrete Lifting
EZPost Deck Repair
ShotCrete Wall Restoration
Additional Options
EverLast Wall Panels
Rockwell Egress Window


Company Awards
Thrasher was ranked 5th in Best Places to Work in Omaha 2015.... [Read more]
We have earned the service industry’s coveted Angie’s List Super Service Award, reflecting an exemplary year of service provided to... [Read more]
More Awards

Sioux City IA's Experienced Contractor

I selected Thrasher because of high humidity levels and mold in our basement.  We also had water coming in through...
Happy Customers Surrounding Sioux City, IA
Work Requests

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Reviews From Sioux City
Testimonials From Sioux City
We called Thrasher because we understand that we need to do something to keep the problem from getting worse. Charles (sales rep) did an excellent job. We...
Testimonial by Connie G. from Sioux City, IA
I'm sure other companies have similar products but I'm more likely to go with the company that is locally based and has knowledgeable and kind staff
Testimonial by Ashley P. from Sioux City, IA
I was very impressed with the representative. He knew immediately the cause of my problem and told me how to solve it. If in the future I would need the...
Testimonial by Phyllis K. from Sioux City, IA

Foundation Repair & Basement Waterproofing

Our company has been Sioux City's trusted contractor for the past 40 years. We are your expert for basement waterproofing, foundation repair, concrete lifting and more. Tell us the problem and we will provide the solution.

Concrete Lifting & Crawl Space Repair 

Basement Systems is a nationwide network of contractors and we are the authorized dealer of Sioux City. We receive regular training and exclusive access to 25 patented products. Give us a call today to get started. 

Why Choose Us: 
  • Completely free consultation & estimate
  • Crawl space encapsulation warranted for 25 years
  • Financing options available
  • 25 year warranty on foundation products
  • PolyLEVEL used for concrete lifting
  • Basement Waterproofing has lifetime transferable warranty
  • In-house team of geotechnical engineers

Get Your Free Estimate

Press Releases From Sioux City
Ashley Stansifer, Marketing Assistant for Thrasher was a guest on Sioux City's KTIV Siouxland Business Spotlight. During her interview they discussed options for sidewalks, patios, driveways, and concrete shifting due to soil conditions.... [Read more]
News & Events From from Sioux City
Flood Prevention, How to Troubleshoot your Sump Pump.... [Read more]
Why is it Important to Hire a Professional Basement Waterproofer?... [Read more]
Work Requests From Sioux City, IA
Ridge Ave in Sioux City
Need repair on driveway
S Irene St in Sioux City
Need a step raised and driveway slab
in Sioux City
Water leaking theough basement wall. Would like an appointment for an estimate please
N Hidden Acres Dr in Sioux City
Have a driveway that is undercut by water. Need to have repaired.
Coyote Run in Sioux City
Need to get two sections of sidewalk raised.
Serving the following Sioux City, IA zip codes
51101, 51102, 51103, 51104, 51105, 51106, 51108, 51109, 51111