How Splash-Back from Rain Damages Lower Walls

During The Gambia’s rainy season, walls often end up stained and damp at the bottom. This is not always due to poor materials, but rather the effect of splash-back — when rainwater hits the ground and bounces onto the wall.

How Splash-Back Happens

  • Rain off the roof: Without gutters, heavy rain falls directly to the base of the house.
  • Mud and water bounce: The force of raindrops splashes dirt and water back onto the wall.
  • Constant wetting: Over time, the lower wall stays damp and develops mould and stains.

The Consequences

  • Black mould and green algae growth.
  • Erosion of plaster at the base of the wall.
  • Walls that stay damp long after the rain ends.
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Practical Tips

• Install gutters: Prevent water from hitting the ground near walls. • Add paving or gravel strips: Hard surfaces around the base reduce muddy splashes. • Maintain proper ground slope: Ensure water runs away instead of pooling.

Splash-back may seem minor, but over years it weakens walls and ruins finishes. Simple measures like gutters and paving can save you endless repairs.