What Do Different Types of Foundation Cracks Mean?

vertical foundation wall cracks in a home
June 9, 2021

We’ve all been there: staring at the foundation of our home trying to figure out if those cracks are serious or not. Does a vertical foundation crack mean something different than a horizontal crack? Can you just fill the foundation cracks? These questions have probably all run through your mind at some point. In this article, we’ll discuss some of the different types of cracks, their meanings, and possible solutions to the foundation cracks.

Vertical Cracks

Vertical cracks are some of the most common cracks that we see, and they are usually a sign of settlement. This means that they may be due to the natural settlement of the home in the first few years after it has been built. However, they could also be a serious foundation repair issue that needs to be resolved.

How do you know? If the cracks are small and have never gotten bigger after they initially appeared after the home was built, they are likely okay to just cover with epoxy. If they have recently appeared, appear to continue to grow, and are wide cracks, there is likely a problem with your foundation. You can monitor this yourself or call a professional to get your foundation crack repair problem checked out.

vertical foundation cracks in a home

Horizontal cracks

These foundation cracks are usually caused by a bowing wall. Bowing walls will usually happen due to hydrostatic pressure. When soil is backfilled beside the home that was dug out for the foundation, it is looser than the heavily compacted soil that hasn’t been dug out. Therefore, it can fill with water and get heavy. This is especially a problem if it happens to freeze.

The heavy, water-filled soil (or frozen soil) then pushes against the foundation in unexpected ways and causes foundation cracks. Eventually, these will lead to a wall bowing in or outwards. This should be taken care of immediately, as they can collapse without warning. If you think you have bowing walls, call the KC Waterproofing and Foundation Repair experts as soon as possible.

Shrinkage Cracks

Shrinkage cracks in a poured concrete foundation wall are caused during the concrete curing process. This is pretty normal and nothing to lose sleep over. However, that doesn’t mean you should ignore shrinkage cracks. If there’s poor drainage around the foundation, hydrostatic pressure will build up and push water through shrinkage cracks and into your basement. Fortunately, shrinkage cracks are easy to seal.

Slab Foundation Cracks

Slab foundation cracks are caused by movement in the foundation. The movement could be caused by various things, including expansive soil pushing against the slab, voids under the slab caused to soil erosion, or upheaval caused by tree roots searching for water. Slab foundation cracks can allow water to enter your home, and if they’re wider than 1/16 inch, you should contact a foundation repair contractor for an inspection.

Slab foundation cracks needing repair

Stair Step Cracks And Diagonal Cracks

If you see diagonal foundation cracks on your foundation walls, you likely also have a problem with bowing walls. If you see stair-step cracks, it’s very likely due to frost heave (when the frozen soil pushes against your home or raises things) OR due to the settlement of the home. In either case, it could be a fairly easy fix.

Have Foundation Cracks? Call KC Waterproofing and Foundation Repair!

At KC Waterproofing and Foundation Repair, we are experts in foundation repair and waterproofing. Never leave a foundation problem to get worse. Fix the problem now and stop stressing about it! Contact KC Waterproofing and Foundation Repair now for more information and to get started.

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.

Bringing Professional Basement Waterproofing and Foundation Repair to homes in Wyandotte County, Kansas including Kansas City, Leavenworth, Atchison, Lawrence, Lansing, and Tonganoxie!

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Gary and his team did a great job and were very respectful of our home. Very happy to have used KC Waterproofing
After having a poor experience with a different company, we made sure we got multiple quotes for our ongoing basement flooding and foundation concerns.Matt L came out to give us our quotes and evaluate our issues which included ongoing basement flooding through our windows as well as improper grading. He was very professional and kind, explained everything that was simple to understand but thorough.We got the side of our house re-graded by Gerry and his team. They were efficient, thorough, and professional. They helped us look at other potential repairs based on our concerns!Our windows were replaced by Dean who did an excellent job! They look amazing. The job site got cleaned flawlessly you wouldn’t even know he was there. The windows are a huge upgrade.We received quotes from 4 companies, however KC Waterproofing was by far the best company to work with start to finish. The coordinated the job so multiple crews came on the same day, which really helped me. They were the only ones that provided solutions at different cost levels, provided a quote on time and reviewed it with us, easy to schedule and communicate with, as well as overall professional. Their pricing was very reasonable and competitive with all other bids. I would definitely recommend them! I’m bummed I didn’t take before photos.
Mario was timely, professional, and efficient. I will continue to utilize and recommend this business based on the excellent service he provided.
Mario was very helpful on his visit to my home. I was concerned about one of the anchors that was installed this summer. He assured me that all was intact and doing like it is supposed to be doing. Thank you Mario!
The team was professional and efficient. They took steps to protect my carpet and cleaned up after themselves.
(2024 Job) I hired KC Waterproofing for another project after they did such a great job the first time. We had piers added to our foundation in the interior and exterior of the house. Ryan and his crew did a great job, were always on time, and cleaned up very well after themselves. I will only use this company for anything foundation related, no one else.(2022 Job) Don and Dontay & his crew were absolutely fantastic. The finished result looked great and would highly recommend them to anyone looking to have their basement waterproofed.
Mario explained what possibly caused the crack to reappear and made the required repairs He was super knowledgeable and profesional.
Our experience with Mario was excellent. He was very knowledgeable and communicated well. Our pump issue was resolved and the basement was left clean . We would definitely recommend him.
Mario came out and did a great job on the crack in our foundation. Scheduling was convenient, ample notifications on appointment and arrival times. He explained everything he was going to do and then everything he did. Hopefully we don't need any further work but if we do, we'll be giving KCW&FR a call.
Whenever it rains really hard our basement would be filled with water. So i had 3 quotes put in for basement repairs and got the best price for what i needed done from KC waterproofing over the other competitors. Had Gary, Kenny and Jeese come out and they fixed the problem and were very nice! I would recommend
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