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Products & Services

Basement Waterproofing
Sump Pump Installation
Drainage Systems
Gutter Downspouts
Perimeter Waterproofing Systems
Zoeller Sump Pump
WaterGuard French Drain Installation
Mold Solutions
Flooded, Wet Basement Repair
Replacement & Egress Basement Windows
Bowing Basement Wall Repair
Battery Backup Sump Pump

Basement Finishing & Remodeling
Waterproof, Washable, Insulated Walls
Drop Ceilings
Basement Window Wells
Energy Efficient Basement Windows
Modular Carpet, Tile & Faux Wood Flooring
French, Bifold, Louvre & Six-Paneled Steel doors

Foundation Repair
Foundation Cracks & Settlement Repair
Foundation Wall Straightening & Stabilization
Street Creep Repair
Foundation Wall Anchors
Helical Piers
Bowing Foundation Wall Repair
WallDefense Wall Brackets & Straps
Push Piers
Slab Piers
Commercial Foundation Services
Pool Deck Repair

Crawl Space Repair
Vapor Barrier Installation
SaniDry Dehumidifier
SmartJack Crawl Space Posts
Energy Efficient Dehumidifier
Radiant Barrier & Crawlspace Insulation
Sagging Floor Joist Repairs
Sump Pump Repair
Sump Pump Replacement
Crawl Space Sump Pump Installation

Radon Services
Radon Mitigation
Radon System
Radon Testing
Radon Inspections
Radon Removal
Electronic Air Cleaner Installation

Concrete Repair
Concrete Leveling & Lifting
Cracked Concrete Repair
Concrete Sealing
Commercial & Industrial Concrete Repair

Before and After Pictures from Onslow
New Waterproofing System in Onslow, IA

New Waterproofing System in Onslow, IA

Before After
New Waterproofing System in Onslow, IA New Waterproofing System in Onslow, IA

New waterproofing system added to a home to help with water issues in Onslow, IL.

Radon Mitigation System Helps Home in Onslow, IA

Radon Mitigation System Helps Home in Onslow, IA

Before After
Radon Mitigation System Helps Home in Onslow, IA Radon Mitigation System Helps Home in Onslow, IA

Clean air quality after the new Radon Mitigation System.

Company Awards
#9 Dealer in Total Basement Finishing
MidAmerica Basement Systems took on Total Basement Finishing early in 2016. In one year of selling the products, the company... [Read more]
25 Years as a BBB Accredited Business
Certificate from the Better Business Bureau celebrating 25 years as an accredited business.... [Read more]
#4 Dealer in the World for CabonArmor 2016
MidAmerica Basement Systems was the #4 dealer in the world for CarbonArmor in 2016. CarbonArmor is one of our many... [Read more]
More Awards

Onslow, IA's Leading Basement Waterproofing & Foundation Repair Company

Happy Customers Surrounding Onslow, IA
Work Requests

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Basement Waterproofing & Crawl Space Repair in Onslow, Iowa

Water in the basement or crawl space leads to mold, rot, musty odors and structural issues. It also leads to a reoccurring headache for you. Luckily, our trained experts are available to permanently fix the problem.

We will properly install a hidden drainage system in your Onslow basement and completely encapsulate your crawl space with CleanSpace vapor barrier. We are here to solve the problem for you.

Why Choose Us?
  • Lifetime Warranty on all Perimeter Waterproofing Systems
  • 25-year Warranty on Crawl Space Encapsulation Systems
  • Sump Pump Installation, Repair & Replacement
  • Basement, Crawl Space & Spray Foam Insulation
  • Bowing Basement Wall Repair
  • Basement Egress Windows
  • Crawl Space & Basement Dehumidifiers
  • Hundreds of Satisfied Customers

Basement Finishing & Remodeling in Onslow, IA

Waterproofing your basement prevents outside water from coming in but what if a pipe bursts or the water heater leaks inside the home. A newly finished basement done by your average contractor will mold and rot if there is an internal leak. You'll have to tear out your new basement! We fix this issue.

Our Products Include :
  • Waterproof, washable, insulated walls           
  • Mold-Resistant, No-Sag suspended ceiling
  • Modular carpet, tile & faux wood flooring

  • Energy-efficient, double-paned basement windows
  • Attractive Sunhouse basement window wells
  • French, bifold, louvre & six-paneled steel doors
Unlike the average Onslow contractor we use completely inorganic, waterproof materials. Even if the basement floods your walls and floors will not be damaged by the water. These waterproof products are patented and are built to create an attractive finished basement that lasts a lifetime.

Structural & Foundation Repair in Onslow

Foundation problems such as bowing foundation walls destroy your Onslow home’s value and can be dangerous. Our in-house team of structural and geo-technical engineers are here to help. We design and install the right solution and usually have the project finished in less than a week. You will have peace of mind as we provide a 25-year written warranty against defects on our foundation products.

We Fix
  • Bowing Foundation Walls
  • Sagging Floors
  • Stair-Step Cracks
  • Tilting Chimneys  
  • Foundation Cracks
  • Garage Slabs
  • Wall Anchors
We Use
  • Wall Brackets & Straps
  • Slab Piers
  • I-Beam Wall Braces
  • Helical Deck Piers
  • Sticking Windows
  • Underpinning

Cracked Concrete Repair, Concrete Leveling, & More in Onslow

The sunken, cracked concrete around your Onslow home is both an eyesore and a safety hazard. It is also likely to get worse, but we can fix it for you.

Our experts use products like PolyLevel, SealantPro, and NexusPro to provide innovative, stress-free, mess-free concrete repair solutions that are not only fast-acting but also ultra-durable. Whether you want to stabilize an unleveled walkway, want to repair a cracked driveway, are interested in sealing new concrete structures, or want to resurface damaged structures, MidAmerica Basement Systems has the solutions for you!

We Fix
  • Concrete Leveling
  • Concrete Sealing
  • Cracked Concrete Repair
  • Uneven Patios
  • Highway & Commercial Concrete Repair

  • Sinking Sidewalks
  • Cracked Driveway Repair
  • Uneven Concrete
  • Sunken Pool Decks

Radon Testing & Radon Mitigation Systems in Onslow

If you think you might have radon gas seeping into your home, it's time to take action. We help homeowners in Onslow, IA with radon testing, and can even provide a FREE quote for the cost of a radon mitigation system for your home.

Job Stories From Onslow, IA
Push Pier Pushing Wall Back Into Place In Onslow, IA

Homeowner, Katie was experiencing wall cracks on her basement walls. She was not sure what was the best way to take care of the problem and did not want to see the problem get worse. She searched the Internet to find the best company possible to help with the job, and she came across the experts in the industry, MidAmerica Basement Systems. A Design Specialist was able to come out to Katie's home and talk to her about why walls fail and explain to her the different stages of wall failure.


Changes in surrounding soil of a home are the primary causes of foundation settlement. Soil can contain air pockets where water can flow into this area. This area is called an "active wedge". Water can freeze in this area causing pressure to be pushed onto the wall causing the wall to start to lean or crack. There are three main causes of wall failure. Wet soil expanding into the wall, hydrostatic pressure from water stacked up outside the wall, and also frost pushing against the wall. There are four stages of wall failure. The first stage is horizontal wall cracks. The second stage is staircase cracks. The third stage is continued pressure and would cause lean or sheer. The fourth stage we want to prevent this stage from even happening. Homeowner, Katie was experiencing the second stage of wall failure. As you can see in the picture, there are staircase cracks starting in the upper right corner of the wall. This is a wall problem that needs to be taken care of so it does not lead into the third or fourth stage.


There are many proven solutions that can help stabilize and straighten the wall! The FSI Push Pier system is a great solution that would be able to permanently stabilize Katie's home foundation. The system has steel tube sections that are hydraulically driven through steel foundation brackets. The home foundation will no longer hold the weight and now the Push Pier's will. This is the best solution for complete foundation lift and stabilization.


If you too are having the same issue as the homeowner, Katie. Please do not hesitate to reach out to MidAmerica Basement Systems! We would be happy to help you out!

Push Pier Pushing Wall Back Into Place In Onslow, IA - Photo 1
Polyurethane Injection In Onslow, IA

Homeowner, Darrin was experiencing cracks within his basement walls, which was causing water leaks throughout. Darrin was not sure patching the concrete was the best idea but has patched it in the past and has not held well, so he thought he should leave it to the experts to figure out the best solution, MidAmerica Basement Systems.

After having a design specialist come out to Darrin's home, Polyurethane Injection would be the best solution to repair his concrete walls. The Polyurethane is injected into the crack or hole in the concrete. The resin reacts with water to form an effective flexible waterproof seal within the crack or hole in the concrete. The Polyurethane also moves with the concrete without breaking the seal. This repair will last longer than a patch. Now Darrin no longer has to worry about the cracks and holes in his concrete walls and not have to worry about when he has to patch the wall next!

If you too are experiencing the same issue as Darrin, please do not hesitate to reach out to MidAmerica Basement Systems, we would be happy to help you!

Radon System Installed In Onslow, IA

Homeowner, Sara heard about Radon from a friend of hers after they had a Radon Mitigation System installed. Knowing that Radon is an odorless and colorless gas, she thought it was a great idea to learn a little more about what can happen if Radon is found within the home. She learned that any level of Radon found within the home can be dangerous, and having children in her home she thought it would be best to have it tested. After having her home tested, they did indeed find Radon in her home. She decided this was a job for the experts in the industry, MidAmerica Basement Systems. Design Specialist, Michael was able to come out to Sara's home and give her the best recommendation to keep Sara's home and family safe, Radon Mitigation System.

Installer, Bill was able to come out and install the Radon Mitigation System in October. He installed a Premium Radon Mitigation System, Crack Sealing, and Exterior Aesthetic Package. Now Sara's home is now once again a safe environment for her family!

If you too are experiencing the same issue as Sara, please do not hesitate to reach out to MidAmerica Basement Systems, we would be happy to help you!

Radon System Installed In Onslow, IA - Photo 1
Work Requests From Onslow, IA
Vicinity of Anamosa Ave in Onslow
We have big c Crack in the foundation by the kitchen we need help

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