in porous materials, against the force of gravity, by means of capillary
action. Since most building materials are porous, water from the
ground will rise up in the walls unless prevented by a damp proof
course. Many older buildings in use today were constructed without
damp proof courses but where included, settlement and vibration
can often cause failure.
rising dampness will cause damage to the structure and is usually
first noted by significant deterioration of internal decorations.
Damp walls will create unhealthy living conditions. Plaster on the
walls will deteriorate due to salts being carried up into the walls
from the ground by the rising moisture. These salts are hygroscopic
(i.e. attract moisture), and as the moisture evaporates, the salts
are deposited on the wall surface. Considerable concentrations can
form, which can attract moisture from the air, thereby increasing
the signs of dampness, particularly under humid conditions. The
deterioration of decorations is a common occurrence on walls affected
by rising damp. Timbers in close contact with damp walls at low
level, such as skirting boards and floor timbers, will often become
attacked by one of the Wood Rotting Fungi.
ABBEY CAN REMEDY THE PROBLEM
Inspection.....Inspection for rising damp
must include consideration of all other possible causes of dampness.
Frequently, suspected rising damp proves to be moisture from other
sources such as leaks from defective plumbing, rain penetration,
high external ground levels or condensation. The source of the problem
initially is determined by the analysis of readings from an electronic
moisture meter. Tests of this type are non-destructive and given
the diagnostic approach and years of experience of our surveyors
we can usually build up an accurate moisture profile in wall structures.