There are various symptoms you may notice throughout your home if your foundation is suffering from the damages described above. We’ll go over the typical warning signs below, along with the most plausible underlying cause.
Foundation Cracks
Most foundations crack in some fashion, but not all fissures indicate structural problems. The positioning, direction, and physical characteristics of the gap can help you determine the likely culprit and how severe the issue is.
Hairline Slab or Basement Floor Cracks
Thin gaps on the surface of your slab or on your crawlspace or basement floor are generally harmless. These form in response to typical settlement after the slab is poured during new construction, and they rarely suggest structural problems.
Given the high risk of water and moisture problems in Jackson, the best option is to have a foundation repair company apply a polyurethane or epoxy sealant to them.
Wide or Uneven Floor Cracks
If cracks in your slab or basement floor continue to widen years after construction or become unlevel at any point, your home is probably suffering from differential settling.
This type of damage requires sealing as well, but it also necessitates substantial stabilization before the crack is filled.
Vertical Wall Cracks
If your home is built slab-on-grade, you may find vertical cracks on the outside face of the concrete under your home. If you have a crawlspace, basement, or pier and beam foundation, vertical cracks may appear on the interior foundation walls.
These are almost always a result of common settling and seldom require repair beyond sealing.
Horizontal Wall Cracks
Horizontally-oriented cracks in your concrete block walls develop when the soil around your home bears too much weight on the vertical concrete.
These fissures are typically structural in nature, and unfortunately, they’re widespread in Jackson because of the high swelling capability of the Yazoo clay in the ground and the excessive rainfall in the area.
Step-Shaped Wall Cracks
Differential settling from drying clay soil or ground instability in response to bedrock erosion can lead to the formation of step-shaped cracks on your foundation walls.
These gaps suggest severe structural problems and can lead to total foundation failure if they aren’t stabilized quickly by a foundation repair contractor.
Moist or Wet Basement or Crawlspace
Lastly, the prevalence of water intrusion and under-home moisture build-up in Jackson leave many different warning signs beneath and inside houses.
Liquid water can leak through foundation cracks fairly easily, especially since the concrete under your structure remains in contact with the moisture suspended in the clay-rich soil for long periods.
You may notice pooling or standing water in your crawlspace or basement, water stains on the concrete, and water damage to building material in the area.

Water vapor generally accumulates under your house after runoff seeps through pores in the concrete and evaporates into the air once inside. Typical symptoms of excess humidity include efflorescence on the walls, insect or rodent infestation, mold growth, moldy odors, and noticeably damp air.
Any type of water or moisture in your crawlspace or basement can affect the air quality in your living space as well. If humid air seeps into your upper floors, you may experience uncomfortably hot or cold temperatures in your house or higher utility bills from increased demand on your heating and cooling systems.
Similarly, airborne mold spores can rise into your living space and create abnormal or unseasonal allergy symptoms, including runny nose, itchy eyes, and respiratory distress.