Rising damp is water that enters a structure from the ground, commonly caused by having a damaged damp proof course, or no damp proof course at all.
Symptoms include decayed skirting boards and floors, stained plaster and peeling paint and wallpaper.
Penetrating damp is when water enters a building from outside and moves through the walls, often creating stains or mould growth at some distance from the leak.
Caused are defects in guttering and pipes, faulty flashings, poor pointing and cracked rendering.
Condensation, the most common form of damp, is often caused by poor heating and ventilation. It occurs when activities such as cooking raise the level of humidity in a building. This air condenses on cold surfaces - windows ans walls.
Running water on windows is the most obvious signal of condensation and can lead to stained curtains, decaying window frames or moulding on paint and wallpaper.
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