What is penetrating damp (pd)? Penetrating damp, or water ingress, is when moisture permeates through a property’s walls from the outside. This can be from blocked or leaky guttering, broken pipes, roof defects or abutting garden walls / flowerbeds.
Unlike rising damp it can occur at any level within the property and affects walls, ceilings and roofs. Also, unlike rising damp, penetrating damp can affect properties of any age with solid brick or stone walls. Though newer properties with cavity walls are less likely to encounter this damp issue.
Visible signs of pd include: