24/01/2025
Is Your Home's Foundation Hiding a Dangerous Secret?
Discover the hidden threat of concrete cancer lurking around your foundation vents. What are the warning signs and how do you protect your home's structural integrity before it's too late?
Concrete cancer is a common issue in concrete ring foundations, particularly around foundation vents. This condition occurs when the reinforcing steel (rebar) within the concrete corrodes. As the steel rusts, it expands, causing the surrounding concrete to crack and deteriorate.
It's most common to see this around vents, but why?
In concrete ring foundations, a reinforcing steel rod runs horizontally near the top of each foundation wall, passing above the vents. At the vent locations, this steel is closest to external air and moisture, making it more susceptible to corrosion. Over time, exposure to these elements leads to rusting of the steel, which then expands and causes the concrete to crack.
Signs to Look For:
Horizontal Cracks Above Vents: These cracks often indicate that the reinforcing steel directly above the vent is corroding and expanding.
Diagonal or Vertical Cracks from Vent Corners: Such cracking patterns can signal structural stress resulting from internal steel expansion.
Hidden Damage Beneath the Surface:
Visible cracks around vents are often just the tip of the iceberg. Significant damage can occur beneath the surface, especially under the house. It's common to find that the concrete inside the vent has deteriorated, leaving rusted steel exposed. This hidden damage can compromise the structural integrity of your foundation if not addressed promptly.
What Should You Do?
If you notice any of these signs around your foundation vents, it's essential to consult with a foundation repair specialist. Early detection and repair can prevent further deterioration and maintain the safety and stability of your home.
