No single visible sign proves rising damp. The following clues can justify investigation when they form a consistent low-level pattern.
01
The seven signs
Low-level tide marks, salt deposits, peeling paint, lifting wallpaper, crumbling plaster, decayed skirting and a vertical moisture profile are commonly discussed. Leaks, condensation and bridging can imitate several of them.
02
Bridging changes the picture
Raised ground, internal screeds, plaster or debris can bridge an existing DPC. Correcting the bridge may be as important as—or more appropriate than—injecting a new course.
03
Confirm before treating
A survey should consider construction, ground levels, salts, readings and alternative sources. Treatment and plaster removal then follow the evidence.
Technical review
Dan, Director / Surveyor
Last reviewed: July 2026. Advice is general until the property, access and visible evidence have been assessed.
When to arrange a visit
Book an inspection when the problem is persistent, changing, purchase-related or unclear after basic maintenance checks.