Condensation is caused from moist water vapor condensing on walls. It is a common issue within homes and often caused from things such as: not opening windows, hanging damp clothing on radiators and poor ventilation.
You can identify this issue by looking out for water droplets on walls, damaged plaster and decaying paint on window frames.
Damp caused by condensation is the most common type of damp occurring in the UK it is particularly a problem within households between October and March which is known by experts as ‘The Condensation Season’.