You noticed a crack in your basement wall, floor or crawl space – now what? 

No matter what type of crack you might be dealing with, it won’t get better on its own. Learn a bit more about the types of cracks, what you should do if you spot one, and how basement waterproofing can help.

Wall Cracks

Vertical Cracks

Vertical cracks in walls are usually stress cracks caused by hydrostatic pressure. Vertical cracks are also the most likely culprits of letting water seep into your basement. If you notice a vertical crack in your basement wall, take care of it as soon as you notice! Without proper Crack Repair, water leakage can only lead to bigger problems – like mold or mildew – that will damage your family’s health as much as water will damage your basement structure.

Horizontal Cracks

A horizontal crack in a wall is a serious issue for the structure of your home. Horizontal wall cracks mean that the foundation of the building has bowed inward, and over time, the weight of your house will only expand the bowing. You may not see much water with this type of crack as it will collect at either the top or bottom of the wall, but the structural problem is severe. Give us a call as soon as possible if you notice a horizontal crack in your basement’s wall.

Diagonal Cracks

Diagonal cracks in your basement wall are typically a combination of vertical and horizontal cracks. They usually do not indicate wall deflection, but instead, foundation footing repairs, such as the wall sinking or falling down. Do not ignore diagonal cracks in your basement wall as these can only get worse. For information on foundation repairs visit our foundation crack repair page to contact us or learn more.

Step Cracks

Step cracks are diagonal cracks in block walls. A block wall crack tends to follow the mortar pattern of the joints, whereas a poured wall crack can occur anywhere in the concrete. These are also commonly culprits of water damage. If you believe you have step cracks, don’t hesitate to have an expert come diagnose the situation. Basement waterproofing and/or basement crack repair could be needed.

Floor Cracks

Cracks in your basement floor are typically hairline cracks with stress cracking due to the hydrostatic pressure of a high water table underneath the concrete. The pressure is essentially trying to force the water up through the floor, which then leads to cracking. This is not usually a structural issue, but it can reveal a history of water coming up through the floor. This type of crack is not the worst to deal with – unless you see a history of water.

If you’ve observed a crack in your basement floor, walls, foundation, or crawl space, you may have bigger problems on the horizon. All of these cracks could potentially lead to a situation which damages the structure of the house, which in turn causes water damage throughout your home. In that case, call an expert as soon as possible to see if Basement Waterproofing or Basement Crack Repair is needed.

Additional Concrete Concerns To Consider


When shrinkage in the concrete has taken place, you will see a less defined crack. The appearance will be more of a pin-like, hairline crack as opposed to a wider crack.


Step cracks and horizontal cracks are usually indications that settlement has occurred.


Expansion can cause a combination of hairline and wider cracks. As the concrete wall keeps expanding, the movement could cause a hairline crack to open up into a much wider one, turning into a step crack or even worse.

We Are Here to Help!

If you’re concerned about mold issues arising from damp, leaky basement floors or walls, or any other moisture-related issues in your basement or crawl space, give DryHouse a call. We are fully-certified, licensed, bonded, and insured, with a team of full-time employees that will be dedicated to making your home the safe, dry space you and your family need.

For immediate service, call DryHouse at 248.469.4870, or schedule an appointment via the form below.



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