Symptoms of Rising Damp include breakdown of plaster on the inside walls.
However, such symptoms may also be caused by water ingress, for instance
if rainwater has been able to penetrate as a result of faulty flashing
around a chimney brest. So alternative causes should be ruled out before it
is concluded that rising damp is the culprit. Where there is any doubt, we
may take samples of the plaster or wallpaper to determine the presence
of certain salts that tend to be indicative of the presence of rising
So, Rising damp can occur under the following circumstances:
- Where there is no damp proof course.
- Where the existing damp proof course is ineffective (either because
the materials from which it is made have deteriorated, or because
the external soil or path levels are too high, causing 'bridging'
to take place). In this case, your local builder should be contacted
(under separate contract) to rectify any problems, e.g. to lower the
existing soil/path levels to below the level of the damp proof course.
This will prevent moisture ingress occurring in the future.
The installation of the damp proof course will prevent the re-occurrence
of rising damp. However, the hygroscopic (water attractive) salts that
were transmitted by the rising damp from the soil to the brickwork will
still be present and will thus still attract moisture, especially during
periods of high humidity. Our specialist plasterers undertake the replastering
works in accordance with the instructions in our Replastering Specifications
in order to prevent this. If you wish your own builders to undertake the replastering works,
then we will furnish you with a copy of these
Replastering Specifications, (use the
text link to view these)
the contents of which must be strictly adhered to in order for our guarantee
to be valid.
Where lateral penetration of dampness, e.g. ground water, is occurring
(normally relates to underground rooms such as cellars) a technique
called 'structural waterproofing' is required. We can arrange this for you under separate
contract if you so require.