Not every foundation problem starts with shifting soil or water in your basement. Sometimes, the trouble lies beneath your home in ways you may not expect. Old cisterns and forgotten wells are one of those hidden hazards.

Old wellWhat Are Cisterns and Old Wells?

  • Cisterns were once common, built to collect and store water before modern plumbing became widespread. They were often dug by hand, lined with brick, stone, or concrete, and then sealed underground.

  • Wells were dug for direct access to groundwater. Many older properties still have them, even if they were abandoned decades ago.

Over time, these underground voids are often covered or forgotten. Some are directly beneath homes that were built later, creating long-term risks for the foundation.

Why Are They a Problem for Foundations?

Cisterns and wells create empty space underground, which compromises soil stability. As the structure above them settles, cracks, leaks, and even collapse can occur. Common issues include:

  • Foundation Settlement – The soil shifts into the void left by the cistern or well, causing one part of the home to sink.

  • Moisture Problems – Abandoned cisterns or wells can fill with water, creating hydrostatic pressure against the foundation.

  • Cave-Ins – Over time, brick, stone, or concrete linings deteriorate, leading to sudden collapse.

Signs You May Have One Beneath Your Home

  • Uneven floors or noticeable sinking in specific areas.

  • Sudden cracks in walls or ceilings.

  • Water pooling in unusual spots in your basement or yard.

  • Historical records that show the property once used well water or cistern storage.

What Can Be Done?

If an old cistern or well is found under your home, it’s not a DIY fix. Foundation experts can:

  • Stabilize the Foundation with helical piers or other deep foundation supports.

  • Properly Fill or Seal the Void to prevent future settlement.

  • Address Water Issues with drainage or waterproofing solutions if water intrusion is involved.

Why It Matters

Hidden cisterns and wells aren’t just quirky pieces of history. They’re real threats to the safety and stability of your home. Identifying and addressing them early can save thousands in repair costs and protect your investment for years to come. Use My Foundation Repairs to find a trusted local contractor who can inspect your property and provide the right solutions to protect your home for years to come.