Rising damp is not top of the list of damp problems found in buildings, condensation is. But a significant number of older dwellings have rising damp problems to a certain level.
Rising dampness issues are normally found by signs of a damp line appearing on the inside wall. This is often combined with damage to skirting board and decorations. Rising damp is a result of dampness in the ground which is drawn up via the capillary channels in to any building fabric.
The serious complaints about rising damp relate to development of spoilage of decorations, decay of wood and wood based materials, appearance of mites and possible adverse effects on health.
The most rising damp problems in buildings exist before they can be recognized by the human senses. That is why buildings should be regularly surveyed for damp by use of a meter.
If left unchecked it will rot any floor joists and other interior timber it comes into contact with, culminating in the development of wet rot or dry rot if conditions of lack of ventilation allow.
The following will contribute to rising damp problems in buildings:
Internal defects in cavity walls.
Internal chimney defects- where a fireplace has been blocked in.
Blocked or defective rain water goods (guttering).
Defective pointing, porous brickwork, spauling bricks.
High ground levels, new drive ways, paths or tarmac bridging the Damp Proof Course ( DPC ).
Faulty or defective flashing on roofs or extensions.
Cracked or Missing roof tiles or slates.
Cracked or Defective window sills.
The Damp Proofing London South warns you that Rising Damp and any damp problems are risk for your health. All reputable rising damp specialists in London will recommend that a survey is carried out immediately if rising damp problems or any damp problem is suspected.
It is important to know that the provision of a barrier against rising damp will only prevent further moisture rising from the ground and that all other sources of dampness must be eliminated as well. Dampness, Condensation and consequential Mould growth or Fungal Decay causes deterioration to the fabric of buildings and can present a serious health hazard to the inhabitants.
There are many sources of moisture ingress, from missing slates of Damp Proof Course ( DPC ) to defective Damp Proof membranes, and to identify every defect which is allowing water to degrade a dwelling requires an expertise which can only be gained from many years of training, experience and practical involvement in building construction and refurbishment.
It is only by practical involvement that knowledge can be gained as to the hidden sources of water ingress and its consequences.
The damage caused by water is very often concealed behind plaster, under floorboards, in brickwork etc. Leak can remains undetected for long periods allowing huge reservoirs of water to build up and be contained within the fabric of the building and only by following a 'Trail of Suspicion' can the original source be traced and remedial measures contemplated.