How Does Subsidence Explained: Causes, Signs, and Solutions | Advice for Homeowners Work?

Imagine your house is sitting on a big sponge that’s slowly getting squished, that is subsidence.

Subsidence happens when the ground underneath your house gets weaker or drier, and it can’t hold up your house anymore. It's like when you take out too many cookies from a cookie jar, the jar starts to sink down because there's not as much support beneath it.

Why does this happen?

There are a few causes of subsidence:

  • If the ground is made of clay, and it dries out (like when it’s really hot or you use too much water from the house), it shrinks.
  • Sometimes, there might be old pipes or tunnels underground that collapse, making the ground move.

What can you see?

You might notice signs like:

  • Cracks in walls or floors
  • Doors and windows that don’t close properly anymore
  • A slight tilt in your house, like a lopsided cake

How to fix it

To stop this from getting worse, people sometimes add water back into the ground (like giving the sponge a drink) or support the house with special posts. It’s like helping a wobbly table by putting something underneath it! Imagine your house is sitting on a big sponge that’s slowly getting squished, that is subsidence.

Subsidence happens when the ground underneath your house gets weaker or drier, and it can’t hold up your house anymore. It's like when you take out too many cookies from a cookie jar, the jar starts to sink down because there's not as much support beneath it.

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Examples

  1. A house starts to crack because the ground under it is slowly sinking.
  2. The soil around a tree becomes loose, causing nearby buildings to shift slightly.
  3. A basement fills with water, making the ground below softer and more likely to sink.

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