09/09/2026
The homeowner noticed damp on their stairwell wall inside the house. That's where the visible damage was — but it wasn't where the problem was.
Our investigation traced the moisture back to a drainage channel on a higher roof terrace above.
🔍 The transition point between the channel and the building had failed. Water that should have drained away was instead finding its way into the structure — travelling down through the building and emerging as damp on the interior stairwell wall.
Two completely different parts of the property. One hidden connection.
This is one of the most important things we see on the Costa del Sol: moisture rarely stays where it starts.
It follows the path of least resistance through the building structure, and where it eventually shows up is often nowhere near the original source.
Finding the cause — not just treating the visible damage — is what makes the difference between a long-lasting result and the same problem returning six months later. ✅
If there's a wall in your home that feels damp and you're not sure why, it's worth finding out.
Start your assessment at www.dry-expert.com