19/01/2026
High external ground levels are a very common cause of penetrating damp.
When soil, paving, or render sits too high against a property, it allows moisture to bridge into the wall and transfer straight through to the internal surfaces.
Over time this can lead to:
• Damp patches internally
• Blown or salt-contaminated plaster
• Mould forming at low level
• Cold, moisture-laden walls
Reducing ground levels and managing water away from the building is essential to prevent moisture entering the structure.
If you’re seeing damp inside and your external ground levels are high, this could be the cause.
Get in touch if you’d like us to take a look.