Your home’s foundation is quite literally what everything else stands on—so when cracks appear, it’s time to pay attention. Not all foundation cracks are cause for panic, but they should never be ignored. Here’s what causes them and how to fix them before they turn into a bigger problem.
Common Causes of Foundation Cracks
1: Soil Movement and Settling
Over time, the soil beneath your home shifts due to moisture, compaction, or natural settling. This movement can cause the foundation to settle unevenly, leading to cracks.
2: Hydrostatic Pressure
When water builds up in the soil around your foundation—especially after heavy rains—it exerts pressure against the walls. This is called hydrostatic pressure, and it’s one of the most common causes of horizontal or stair-step cracks in basement walls.
Poor Drainage
Improper grading or clogged gutters can lead to water pooling around your foundation. This not only causes pressure but can erode soil and create voids under your home’s footing.
Construction Issues or Material Shrinkage
Sometimes, the issue stems from how the foundation was originally poured or the natural shrinkage of concrete as it cures. These cracks may be minor but should still be evaluated.
Types of Cracks and What They Mean
- Hairline Cracks – Often due to concrete shrinkage; monitor for spreading.
- Vertical Cracks – Common and usually less serious, but should still be sealed.
- Diagonal or Stair-Step Cracks – Can indicate foundation movement and may require structural repair.
- Horizontal Cracks – Often the most serious, typically caused by hydrostatic pressure.
How Green Home Solutions of Southern Maine Can Help
At Green Home Solutions of Southern Maine, we don’t just patch cracks—we get to the root cause. Our foundation repair services include:
- Expert inspection and diagnostics
- Foundation sealing and waterproofing
- Drainage improvements and sump pump installation
- Structural crack repair using long-lasting solutions
Don’t ignore cracks in your foundation. If you’ve spotted one, schedule a no-obligation assessment with our basement waterproofing team today. Early action can save you thousands in repairs—and protect your home’s value long-term.