Condensation is occurring in this room, water is visible on the windows and mould growth can be seen on the window reveals
Mould growth can be seen on these damp wall surfaces, condensation the cause of the dampness
A characteristic sign that dampness is rising from the ground. A horizontal tide mark is visible approximately 1m above the floor, the wall covering is damp and discoloured. Some immediately recommend a new damp proof course as the existing one is missing or has failed. Investigating the dampness can reveal the real cause, bridging of the damp proof course due to the plaster being in contact with the floor, blocked cavities, incorrect re-plastering, or even a leak!
Ingress of Moisture
Blocked gutters can cause water to overspill leading to wetting of the walls.
Dry Rot fungal decay and its effects on floor timbers
Effects on the wood
The decayed wood shrinks and splits into cuboidal pieces with cross cracking across the grain. The wood becomes light in weight and colour and crumbles between the fingers.
Fungal strands are grey or white, 2 - 3mm thickness which becomes brittle when dried. In dark, damp places, soft white silky growths can develop
Timbers attacked by woodworm.