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Floor and Wall Gaps

Almost every structure in your home depends on the health of your foundation. When your foundation gets damaged, so do important structures such as walls and floors.

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Floor and wall gaps can be jarring the first time you notice them. Not only do they look distressing, but they also indicate larger foundation damage. Failure to address these gaps will only lead to other foundation problem signs and may harm your home even more. Thankfully, Mount Valley has the expertise to identify and repair floor and wall gaps, as well as any other foundation issues! 

What Causes Floor and Wall Gaps? 

Almost all foundation problem signs stem from issues with the surrounding soil on your property. When soil gets damaged or weakened in any way, so does your foundation and problem signs emerge.  

heavy rain and outside flooding

Soil Washout

Our local teams in Charleston, Columbia, Greenville, and Savannah know just how much rain South Carolina and Georgia receive each year. For that reason, it’s important for homeowners to understand how precipitation can impact the soil in their yard, and by extension, your foundation. Essentially, when too much moisture saturates the soil supporting your foundation, it becomes mushy and weak. This moisture can come from precipitation of any kind including rain, hail, or snow.  

However, drainpipes and clogged gutters can also be a source of excess moisture. If water drains too close to your foundation, it can cause all the same problems as normal precipitation. No matter how water gets into your soil, the bottom line is that it can cause issues for your foundation which eventually causes floor and wall gaps to develop.  

pencil through wood in crawl space

Damaged Floor Joists

Floor joists are long horizontal wooden beams that support the floor of your home. Usually, they become damaged when moisture leaks into your foundation either through cracks in the foundation walls or through heavy precipitation. When these wooden beams are exposed to moisture, wood rot forms and breaks them down. As the process continues, the floor joists will no longer be able to support the weight of your home and your floors may separate from the walls. Even worse, moisture in your foundation could lead to additional structural problems such as sagging floors or wall cracks.  

bowing and cracking basement wall

Bowing Walls

Bowed walls are also a product of larger foundation issues. However, despite being their own problem sign, they also directly contribute to floor and wall gaps. Thankfully, fixing one means you’ll likely be fixing the other since they’re so closely connected.  

Bowed walls can also lead to a tilt or lean in some of your walls, a damp or musty odor emitting from your foundation. If you notice any of these signs, call a professional immediately. 


Simply covering up the hole with caulk or some other material fails to solve the actual issue: foundation damage. See, while it’s easy to assume that the main problem is only between the wall and the floor, you actually need to focus on repairing whatever foundation problem is causing the gap to form between your walls and floors in the first place. This could be due to foundation settlement, faulty construction, floor joist collapse, or any number of other issues. Filling the gap with a DIY option might offer a cosmetic fix, but the gap is going to open up again at some point unless the foundation damage is dealt with. 

Yes, floor and wall gaps can lead to other issues which can damage your home further. Foundation damage is an escalating problem. It might start with floor and wall gaps, but other issues will pop up if the foundation is not repaired quickly. This includes sagging floors, stuck doors and windows, cracked concrete, wall cracks, and foundation upheaval. All of these can end up costing you tons of money in the long run. Foundation repair can help you save money and keep your home protected. If you see a floor gap in your home, don’t wait to call a professional – your wallet will thank you.  

Yes, besides soil washout, there are two other ways that soil can cause foundation damage. One of them is through drought or dryness. If soil becomes dried out, it will become cracked and brittle. Additionally, it will shrink in volume. These two conditions lead to gravity taking hold and causing your heavy foundation to crush down into the weak, dry soil.  

Another way that soil can impact your home is through poor compaction. Most often, this occurs during the construction of a new home when contractors transport soil from a different location and use it to fill the land on which your home will be built. If they don’t press the soil together tightly enough, air pockets will form in the soil and cause it to collapse over time. Once again, your home may sink into the weak soil and cause foundation issues to arise.  

Contact Us for a Free Inspection 

Floor gaps might seem like a shocking problem when first encountered, but solutions exist to solve the problem quickly and efficiently. For our foundation experts, no foundation issue is too big, and our team is committed to keeping your home protected from foundation damage so you can be sure your home stays well protected for years to come. We’re proud to serve homeowners in Charleston, Columbia, Greenville, and Savannah. Learn more about foundation repair and schedule a free inspection by contacting us today! 

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    1850 Ashley River Rd
    Charleston, SC 29407


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    Cayce, SC 29033


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    Spartanburg, SC 29306