Rising damp is the name given to a specific form of dampness, which comes from ground water, which moves up through the interlinked masonry pour structures via capillarity. For it to occur there must be a suitable source of ground water at the base of a wall, which may be seasonal.
The height of rising damp is controlled by the thickness of the wall, masonry pour structure size and the volume of water at the base of the wall and surface evaporation.
When water rising up a wall by capillarity it creates an electrical potential and negative ions travel from the positive ground through to the negative wall.
Note: If you see a black spackled mould growth rising up from your floor level, this is not true rising damp.
At the time of construction rising damp is controlled by installing a physical barrier to moisture a Damp Proof Course. Where there is no DPC or it has been bridged or broken down then, the following remedial rising damp control measures may be used:
Rising Damp ( a brief overview)
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