Some signs of excessive humidity:

• water drops on the inside of windows for long periods,

• walls feeling cold and damp to the touch,

• a strong, musty smell,

• clothes and bedding feeling slightly wet or never fully dry,

• small black/grey spots appearing in corners or around window frames.

If you notice any of these regularly, you should:

• ventilate more often and more intensively,

• avoid drying clothes in that room,

• heat the room properly in cold weather,

• clean small spots immediately.