causes of water leaks in basement
June 8, 2021

#1: Under the Footer

It’s common in the construction industry to leave a small space between the footer and the poured foundation floor. But excess water can build up and create pressure, causing water to seep in through this crack. This can cause damage to the inside of your home and make the basement space unusable for living space or storage.

#2: Cracks In Foundation Wall or Mortar Joints

Excess moisture in the soil around your basement walls can build up and create pressure, which can cause cracks in the foundation and allow water to seep in. If you have concrete block walls, this seeping water may not be visible until it builds up inside the blocks. This can cause mildew and other problems from excess moisture. You might also see water seeping out of the bottom of the wall.

#3: Cracks In Basement Floor

Water can build up in the soil below your basement floor and create pressure, which can then cause water to press through cracks into your basement floor. The easiest way to tell if this is happening is if you see any visible water pooling on your floor, particularly in any low spots. If you don’t see pools of water directly, there are some signs to look for that might indicate that water has previously pooled there. Pay attention to water stains or other discoloration on the floor. Also, look for efflorescence, a white or gray powdery residue of salt deposits that water leaves behind.

#4: Windows and Window Wells

Because basement windows and window wells are located below ground level in a recessed area, they can accumulate dirt, debris, water, pests, and growing plants. Window wells can fill with water during wet weather, seep out through leaks around the window opening, and flood your basement. If older basement windows and window wells have not been properly maintained, they can rust, rot, or corrode, which can create leaks into your home and cause mold or mildew problems.

You need to keep your basement windows and window wells in good shape, to help keep moisture and water out of your basement. Make sure your windows completely seal without any holes, gaps, or cracks around them.

#5: Over the Top of Your Foundation

A heavy influx of water and improper foundation grading next to your home can allow water to get into your basement. You need to make sure your gutters and downspouts are cleaned out, fully connected, and draining freely. Also, check the location of your discharge for your downspouts and your sump pump. We recommend these discharge at least 10 feet away from your property.

Watch where the water flows in your yard, and pay special attention to any pools of water close to your foundation. It’s common for the soil next to your foundation to settle over the course of the seasons, so you may need to add some topsoil next to fill in any low spots that have formed. Focus on a 6-foot perimeter around your home to make sure the soil distinctly slopes properly away from the foundation,

What To Do If You Find a Problem

If you see any problems, you should get them checked out right away. Contact us today to schedule a free consultation. We’ll thoroughly evaluate your property and give you a professional recommendation to solve the problem for good.

Visit our Ultimate Guide to Waterproofing Your Kansas City Home for more articles that will help you keep the basement of you Kansas City Metro area home dry and strong.

Proud to provide Professional Basement Waterproofing and Foundation Repair to the families in Topeka, Kansas. See our Service Area page to find out all the Kansas and Missouri cities we serve.

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Satisfied Customer Reviews

Jeff Wolfe was excellent providing a thorough inspection, informing us about the company history, the technology and strategies utilized and our options. I would highly recommend Jeff and KC waterproofing!
First class in every way. Very friendly and accommodating. They do things the right way even if it takes much more time to get the project done. Their job of putting things back the way it was, was spectacular! They even replanted the flowers they had to dig up.
Great company and extremely easy to work with. Riley was my point of contact and he explained everything very well. After I denied working with them on one property (due to family issues) Riley happily messaged me back when I needed help with another property. The solution was a hard one to figure out, but Riley constantly made suggestions that would hopefully solve the issue without doing too much work that isn’t needed. Riley clearly explained what I needed and don’t and also gave guidance for other issues I had going on regarding window sealing.

Schylur Oakes and his crew were the ones that came and worked on my property. Schylur was extremely personable and friendly. He constantly ran back and forth from the back of the house (where the work was being done) to the front of the house to ring my doorbell and ask me if I was okay with what they were doing, if I wanted them to change anything etc. One moment he even came and asked if I really need the work to be done since there were sprinklers near my basement window and maybe that was the issue instead, not foundation and rain water. I clarified that I don’t even use my sprinklers and I still have water entering but I was glad he even brought it up and checked with me before proceeding. Schylur ended the day by having his crew clean up after themselves and showed me around and told me everything they did.

Only issue I had was payment processing was a pain. It’s 2026, I shouldn’t have to give my card number over the phone for a deposit, just send me a link to a secure site to enter it. How can I trust some random number and voice over the phone? Then for the final payment, having to manually type out and input my card information in to a tablet while it was raining was a slight nuisance. I have my own small business and use Square tap to pay. It’s not that expensive. Come on guys, if I’m using it for my little business, you can afford it for your long standing company. Just my 2 cents.
Camden came and did a thorough inspection of our foundation and explained the findings well. I felt he was honest with his recommendations and did not try to convince us to do something that wasn't necessary.
Will use KC Waterproofing and Foundation Repair again and highly recommend.
Thank you Cam!
Very professional, informative and did a great job cleaning up after the job.
Jeff was very professional and informative. Fortunately we didn't have foundation problems but if we do we know who to call.
Mario was here on time & was very informative about questions I had. A 10 out of 10. Thank you …Mario
This is the second time I've used this company. Great company. They have good employees. Fran did a great job of explaining everything, even the financing. I thought the lending company had great options. When it was time for my French drains to be installed. They came on time and ready. They even did a crawl space protective cover. Great team, they worked well together. Took the whole day but got it all done. Cleaned up well afterwards. The price was reasonable. Jackson explained everything as it went along. Kind, friendly service.
Mario serviced my sump pump today and did a good job. He also replaced tape on my wall shield. He provided excellent customer service and was willing ti come out any time needed or said to call him anytime if I had any questions.
KC Waterproofing and Foundation Repair has taken incredible care of my home through multiple visits. Gary and Davan handled my initial sump pump installation and crack repairs, and they were not only skilled but genuinely thoughtful throughout the process. We had a bit of early miscommunication, and instead of brushing it aside, they listened, acknowledged what happened, and adjusted the plan so everything aligned with what I needed.

They brought me in at every step—walking me through pump location options, explaining the exit pipe decisions, and making sure I felt confident about the work being done. Their friendliness and respect made a stressful repair feel manageable.

Later on, I had some cracks that needed to be reassessed, and Mario came out to take a look. He was incredibly kind, patient, and thorough, and he did an amazing job with the additional repairs. His calm, reassuring approach made me feel completely taken care of.

I also want to highlight Don, the manager, who is just as kind and committed to making sure customers feel heard and supported. It’s clear this team truly values doing right by people.

I’m grateful for their care and would absolutely recommend them for any foundation repair or waterproofing needs.