Milwaukee’s Best Basement Waterproofing Contractor since 1985

Locally owned & operated | BBB A+ Rating

Basement Waterproofing | Milwaukee

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(414) 520-0122


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  • Fully insured
Best Basement repair company Milwaukee
  • I would recommend Zablocki highly. Lowest estimate of three estimates. John, Steve, and Ziggy worked quickly and let me know what they were doing at every stage. I also like... read more

    Jon Little Avatar Jon Little

    A great company worth doing work with! John was very knowledgeable and easy to work with. Steve and Zig did a great job with the repairs and install. Very high... read more

    Max Kobold Avatar Max Kobold

    We highly recommend Zablocki, they are wonderful and so easy to work with. Most recently they helped us out and fit us into their schedule so quickly allowing our... read more

    Nick Vande Hei Avatar Nick Vande
  • The Zablocki Team is the most professional , thorough and attentive to detail company I HAVE EVER worked with. From the initial meeting to the project completion they were a... read more

    Carolyn Miskell Avatar Carolyn Miskell

    I HIGHLY recommend this company for your basement needs. From the initial estimate (I received estimates from 5 different companies; Zablocki was not the "cheapest") through completion of the... read more

    J White Avatar J White

    We highly recommend Zablocki Waterproofing. The crew was always on time. They were friendly and informative. They work on one project until completion. Very clean and thorough. Definitely deserve 5... read more

    Mary Remiszewski Avatar Mary Remiszewski
  • crew was on time. showed me work done before sealing the work up. No mess after they left. very happy with the company.

    Carl Farner Avatar Carl Farner

    We wish to thank Zamblocki Waterproofing for proving to us we selected the right Waterproofing Company. Top Gun Crew of Steve,Stephan,Luke and Eric. They arrive on time,stay on task& complete... read more

    Marcia Valley Avatar Marcia Valley

    Our basement has been leaking through the walls. We collected more than a few estimates and decided on Zablocki, based on their thoroughness and understanding of what we wanted, and... read more

    Jan Wexner Avatar Jan Wexner
  • John Zablocki was outstanding with our original estimate of steel re-enforcement and drain tiles on two walls. Then, when we revealed we needed to add a third wall, he patiently... read more

    Jeffrey Knapp Avatar Jeffrey Knapp

    My basement problems are over thanks to the awesome, professional work that included excavating down to the footings, straightening the block wall, re-grouting cracks inside and out, waterproofing the outside,... read more

    Clark Wantoch Avatar Clark Wantoch

    You can’t get any better than Zablocki- if I could give 10 stars I would. We were in the middle of a basement renovation when our drain tile started... read more

    Niki Quirk Avatar Niki Quirk
  • We have been having problems with our drain tile for years and finally decided to call a specialist. The owner came the same day and was able to give us... read more

    Kelly Mishefske Avatar Kelly Mishefske

    I had my basement waterproofed by Zablocki and had a great experience. From the first inspection to the final clean up, the team was professional and respectful, answered all of... read more

    Jennifer Fabbre Avatar Jennifer Fabbre

    Zablocki Waterproofing performed a waterproofing project on my mom's basement. John's crew arrived when they said they would and completed the task as outlined in the bid. My... read more

    Karin Dilk-Kant Avatar Karin Dilk-Kant

Schedule a FREE consultation:

Estimates are free, and Zablocki never oversells – period. You can trust Zablocki to provide you with a clear and concise explanation of your problem and present you with the most cost-effective foundation repair and basement waterproofing solutions to restore your property to like new or better than new condition. Local owners John Zablocki and Dale Granbois have a history of letting their customers do the advertising for them, driving business success by consistently providing outstanding basement waterproofing service at the lowest possible cost.

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Question? Want to schedule a FREE consultation?

Call: (414) 520-0122 or Click to Text or Email: zablocki.inc@gmail.com

Before Waterproofing

Basement waterproofing Milwaukee

After Waterproofing

Best Basement Waterproofing in Milwaukee WI

Why Choose Zablocki?

Milwaukee, Waukesha, and area residents and business owners have trusted the basement waterproofing contractors at Zablocki Waterproofing to repair their properties since 1985. With more than three decades of full service foundation and basement repair experience, Zablocki has the knowledge needed to identify the source of your basement moisture problem and the skills required to alleviate the cause and repair the damage. We’re also able to complete basement beaming and reinforcement services without excavation by using steel beams.

If you’re in the Milwaukee area, and your basement is damp, wet, or has cracked walls, finding the cause of the problem is the first step. Zablocki Waterproofing will assess your home and clearly explain to you what is creating these conditions. They will then provide you with a free estimate of the basement repair services you will need to fix the problem and restore your basement to a comfortable and dry living space. Foundation crack repair and basement waterproofing can restore your basement and add living space to your home.

What Our Customers Have to Say

We had our basement waterproofed by Zablocki Waterproofing this year after having leaks and problems keeping our basement dry. Their team did a fantastic job inspecting our basement and got on the job quickly after I made the call. The price was reasonable and the job was finished in a timely manner. The staff on the job were professional, friendly, and made sure all of my questions were answered. My basement hasn’t had any issues since Zablocki came to the rescue! Highly recommended!

John and Dale were both knowledgeable and courteous. The working crew of Paul, Steve and Ziggy were prompt hard working and happy to answer any questions we had. Fair price, a fast and correct repair, and clean up after job was done. A five star team! Thanks guys!

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Frequently Asked Questions

Why is basement waterproofing important? 

Wisconsin weather means a lot of moisture enters the ground surrounding our homes in the form of rain and snowmelt. Moisture in the ground around a home causes the soil to expand, exerting pressure on our foundations and basement walls. This pressure can cause cracks, buckling, and even foundation upheaval, giving water plenty of opportunity to enter your basement. 

The biggest danger to basement moisture is that it can lead to mold and mildew, which can be hazardous to one’s health. This is why basement waterproofing and foundation repair services are so important: basement moisture is never a good thing and the problems that lead to it only get worse over time. 

If you’ve never considered how secure your basement is against moisture, or if you’ve already noticed standing water or condensation in your basement, give the experts at Zablocki Waterproofing a call today. 

What is exterior waterproofing? 

The term “exterior waterproofing” encompasses a number of strategies meant to keep water out of your basement. 

Protecting your basement from moisture starts with landscaping, Ensuring the soil around the perimeter of your home slopes away ensures water will drain away from your home rather than pooling around it. Another strategy you can maintain yourself is ensuring your gutters and downspouts are working well and directing water away from your home. 

At Zablocki Waterproofing, we can help you install what is called a “drain tile system.” This is a very effective method of exterior waterproofing. Basically, a drain tile system surrounds the perimeter of your home, capturing water trying to enter your basement, rerouting it to your sump pump, which then pumps it out and away from your home. In partnership with other basement waterproofing strategies, a drain tile system can be extremely effective in the fight against moisture. Give Zablocki Waterproofing a call today to get started. 

What is interior waterproofing? 

No matter how hard you try to keep water out of your basement, there is still a chance it will sneak in, meaning you want to have interior waterproofing strategies in place. The point of interior waterproofing is to ensure that any moisture entering your basement is collected and rerouted back outside. 

One of the most effective interior waterproofing strategies is a sump pump system. In addition to collecting groundwater that collects in an interior drain tile system, the sump pump can also collect interior basement moisture, pumping it back out and away from the home. 

Other interior waterproofing strategies include installing vapor barriers in the interior of basement walls, repairing any cracks that appear in basement walls or floors, and making sure to keep the basement as ventilated as possible using fans, dehumidifiers, etc. 

Does my home need both interior and exterior waterproofing? 

It may seem like we are biased but, having seen the toll that basement moisture can take on a home and the people in it, we can answer this question with a confident YES. A combination of exterior and interior basement waterproofing strategies will offer that much more protection against moisture, making it less likely that you’ll have to deal with expensive repairs down the road. 

What’s so bad about basement moisture?

When compared to, say, a flood, a little bit of water in your basement may not seem like a big deal. However, a little water in the basement means more is coming and can lead to serious damage. Basement moisture can not only ruin drywall, carpet, and any belongings you have stored, but can lead to the growth of mold and mildew. While some people don’t seem to have a negative reaction to mold, it can be very dangerous for others. As soon as you notice even a little bit of moisture, it’s time to bring in a professional and get it taken care of. By reacting quickly, you’ll save yourself a lot of headaches down the road. 

What can I do to keep my basement dry? 

Make sure that you clean out your gutters and downspouts twice a year to ensure they can do their job. Keep an eye out for cracks or holes in or around your basement and, if you see them, bring in a professional to patch them up. Keep your basement well ventilated using fans and a dehumidifier and, if you notice basement moisture, call in professionals like Zablocki Waterproofing right away. 

Looking for expert basement waterproofing services in Milwaukee and surrounding communities? At Zablocki, we have more than 30 years of experience keeping local homes safe and dry. Give us a call today to get started. 

What is a foundation and why is it important? 

The foundation of your home is critical to keeping everything else – the floors, walls, windows, roof – in its proper place. Typically constructed of poured concrete, the foundation is the base upon which the rest of the home is built. 

Foundations serve three purposes: 

  1. They bear the load of the rest of the house
  2. They anchor the home to the ground to protect it from natural forces such as tornadoes and earthquakes (luckily not much of a problem here in Wisconsin)
  3. They protect the home from ground moisture

Most homes in Wisconsin have a basement, which means the foundation of the home consists not only of the concrete base but includes basement walls as well. This means that there is more surface area to maintain as part of a foundation repair and maintenance plan. 

Why might my home need foundation repair services? 

While they may seem indestructible, concrete foundations are susceptible to their own set of issues. Here are the most common foundation issues we see in our work as foundation repair experts: 

  1. Cracks, fractures, or buckled basement walls. Cracks in your foundation or buckled basement walls mean the security of your home’s safeguard against outside moisture has been compromised. This can lead to water seepage, mold problems, and other costly repairs down the road, so it is best to call in an expert as soon as you notice a foundation crack. 
  2. Settling or sinking foundations. It is entirely normal for a newly constructed home to settle slightly in the first 2-3 years, but in an older home (or if you notice significant sinking beyond just an inch or two), sinking can mean big problems in the home’s foundation. 
  3. Foundation upheaval. The opposite of foundation sinking/settling is upheaval, or when the foundation is pushed upwards due to soil movement. This can cause a host of issues throughout your home’s structure, so it is best to call in an expert to fix this issue right away. 

What causes foundation problems? 

Here in the Milwaukee area, we can nearly always blame the weather for foundation problems. Rain, ice, and snow cause water to seep into the soil around the home, which makes it expand and contract. This soil movement exerts enormous pressure on a home’s foundation, which can make it move and break. Once a foundation is compromised, any water that comes near it will find a way into the home, putting your home at risk for mold and mildew. 

How can I tell if my foundation has these problems? 

If your foundation is out of whack, you will almost certainly be able to tell. The health of your home’s foundation affects every other part of the home, so look out for the following signs that something is not right: 

  • Visible cracks on the inside or outside basement walls. 
  • Basement moisture – look out for standing water, condensation on basement appliances, dampness in crawlspaces, and mold or a musty or moldy smell. 
  • Doors that are sticking or not closing properly. 
  • Gaps around windows. 
  • Kitchen cabinets and counters that have separated from the wall.
  • Broken chimney.

Is foundation repair really that important? 

For most people, a home is the largest investment you’ll make in your lifetime, and the foundation of the home is arguably the most – or one of the most – important elements of the home. Foundation problems like the ones listed above – cracked or buckled basement walls, sinking foundation, stuck doors, gaps around windows, and water seepage into your home – are not going to improve over time. In fact, they will undoubtedly get worse and could lead to even larger costs down the road. 

One of the most significant risks associated with foundation issues is the eventual growth of mold and mildew in your basement. One of the most important jobs your home’s foundation has is to keep moisture out of your basement. But, if your foundation cracks, buckles, or otherwise experiences movements like sinking or upheaval, it weakens its structure and can allow water to seep through. Once inside the walls of your home, water can cause mold and mildew growth.

Some people are highly susceptible to health problems when exposed to mold and mildew, so this is not a problem you want to ignore. 

While foundation repair might not fall in the category of fun home upgrades, it’s crucial. And having an experienced team like Zablocki on your side will help you protect your most important asset. Have questions or looking for foundation repair in Milwaukee? Give us a call today. 

Expert Tips for Maintaining a Dry Basement All Year Round
Best Basement Wall Crack Repair Techniques
How to Prevent Mold in Damp Basements

Our Service Area

Milwaukee County

Waukesha County

Washington County

  • West Bend
  • Germantown
  • Hubertus
  • Richfield
  • Hartford
  • Slinger
  • Kewaskum
  • Jackson
  • Allenton

Walworth County

  • Lake Geneva
  • Delavan

Ozaukee County

  • Cedarburg
  • Grafton
  • Port Washington

Racine County

  • Racine
  • Waterford

Jefferson County

  • Ixonia
  • Watertown

Kenosha County

  • Kenosha