Foundation Cracks: Normal Cracks and When to Worry
Cracks in a home's foundation are a typical sign of an underlying structural problem. But not all foundation cracks are an issue to be concerned about. When combined with other symptoms, a cracked foundation warrants an inspection. You may see wall cracks in block basements or poured concrete walls sagging inward at the top. You may also notice bouncy floors as your crawl space deteriorates beneath them. Even issues that may seem unrelated can indicate a problem with the foundation, such as sticking windows and doors, ceiling gaps, and a tilting chimney.
Ignoring these warning signs of a foundation problem can be catastrophic for your home’s safety, value, and appearance. While some foundation cracks are normal, others can lead to significant structural damage and allow foul odors, pests, and water to enter the home.
This article will teach you everything you need to know about foundation cracks, including why they occur, the different types of foundation cracks, and when to call your local foundation repair expert for help.
What Causes Foundation Cracks?
Foundation cracks are typically caused by one of three conditions.
- Curing Concrete: When concrete cures, it creates minor cracks within the slab, often referred to as shrinkage cracks. At less than 1/16” wide, shrinkage cracks are typically harmless.
- Foundation Settlement: The natural settlement of your foundation is caused by loose backfill, soil erosion, and other soil deterioration under or around the home. Settlement cracks are one of the most serious foundation cracks because they are consistently growing.
- Soil Expansion: The expansion of soil occurs when the soil becomes wet or dry with changes in weather conditions. Wet soil can expand enough to place significant pressure on your home’s foundation. This can cause your foundation walls to bow inward and crack.