Discovering cracks in your foundation can be alarming, but not all cracks are cause for immediate concern. Understanding the difference between cosmetic cracks and serious structural issues is crucial for homeowners. This guide will help you identify which cracks require professional attention and which are simply part of normal settling.
Hairline Cracks (Usually Not Serious)
Hairline cracks are thin cracks, typically less than 1/16 inch wide, that often appear in new concrete as it cures or as a home settles. These are usually cosmetic and don't indicate structural problems.
- Less than 1/16 inch wide
- Vertical orientation
- No water seepage
- Not growing or widening
Horizontal Cracks (Serious)
Horizontal cracks are the most serious type of foundation crack. They indicate significant pressure from the soil outside pushing against your foundation wall. These cracks can lead to wall failure if not addressed promptly.
- Run horizontally across the wall
- Often accompanied by bowing or bulging
- May show signs of wall displacement
- Require immediate professional evaluation
Stair-Step Cracks (Potentially Serious)
Stair-step cracks follow the mortar joints in block or brick foundations, creating a stair-like pattern. These cracks often indicate differential settlement—when one part of your foundation settles more than another.
- Follow mortar joints in a diagonal pattern
- Wider than 1/4 inch is concerning
- May indicate foundation settlement
- Should be monitored or repaired
Vertical Cracks (Monitor Closely)
Vertical cracks are common and often result from normal settling. However, they can become problematic if they widen, allow water infiltration, or are accompanied by other signs of foundation issues.
- Run vertically up the wall
- Wider than 1/8 inch needs attention
- Check for water seepage
- Monitor for growth over time
Warning Signs That Require Immediate Action
Certain characteristics indicate that foundation cracks are serious and require immediate professional evaluation. Don't delay if you notice any of these warning signs.
- Cracks wider than 1/4 inch
- Cracks that are growing or widening
- Water seepage through cracks
- Doors and windows sticking or not closing
- Uneven or sloping floors
- Gaps between walls and ceiling or floor
- Bowing or bulging foundation walls
When in doubt, it's always better to have a professional evaluate foundation cracks. What seems minor could be an early warning sign of a more serious problem. Presto Waterproofing offers free foundation inspections to help you understand the condition of your foundation and recommend appropriate solutions. Contact us today to schedule your inspection.