Rising damp guide
Is Black Mould a Sign of Rising Damp?
Black mould is not the classic sign of rising damp. It grows where surface conditions stay damp enough, which is commonly linked to condensation and poor air movement.
Cold surfaces encourage mould
Outside corners, window reveals and walls behind wardrobes are common places because the surface can be colder and air circulation poor.
Rising damp can alter surface temperature
A persistently damp masonry wall may be colder and therefore more prone to condensation. That means the two issues can occasionally overlap.
Look at the whole pattern
Widespread mould around windows and ceilings tells a different story from salt-damaged plaster and decayed skirting confined to the base of one wall.
Cleaning mould is not diagnosis
Removing visible growth may be sensible housekeeping, but recurrence means the moisture conditions still need addressing.
Want somebody local to look at it?
If you would rather have the damp investigated in person, you can use our help page to describe the problem and decide what sort of specialist you need.