This common airflow mistake could be causing damp patches behind your furniture, experts warn

Neutral painted bedroom with a large bay window, and a bed with neutral bedding on it.

If you've ever shifted a sofa or wardrobe and discovered a cold, damp patch hiding behind it (complete with musty smell), it's rarely down to a mystery leak.

In most homes, the hidden cause is poor air circulation, according to experts, especially when bulky furniture is pushed tight against a cold exterior wall where moisture builds up out of sight.