Rising damp in historically important building and old

 

Rising dampness in masonry walls
causes vexatious issues to the old buildings especially for historical buildings.
Upward movement of moisture through the walls by capillary action is called
rising of damp. Rising of soluble salts due to dampness may lead to lots of
pathologies. Aesthetic degradation and structural damage to exterior part of
buildings are serious effects due to this issue. This creates an unpleasant environment
for the people who are living there. Rising of damp is an serious issue especially
in historical buildings. Even though construction field has developed immensely
over past decades this issue is still there in newly built buildings. So there
is a need for a proper rectification method for rising of damp. Presence of
moisture in buildings may occur due to various ways such as infiltration from
roofs, pipe leakages, condensation, and capillary rise from soil, flooding, and
poor drainage. Rising damp is one of the most wide spread phenomenon responsible
for the presence of moisture in buildings.

 

It is one of the persistent
problem which requires much effort and financial resources for it’s rectification.
Removal of rising damp in historically important building and old structures is
extremely difficult and undeniably a challenging task due to the restrictions
related to historical buildings, characteristics of masonry and aesthetic
constraints. Removal of rising damp from historical buildings is still remains
as a challenging task and the authorities related to these buildings are still
short of efficient and reliable techniques to treat the rising of damp. The
techniques that are already in use are ineffective so an effective reliable technique
for dehumidification of masonries is much needed. This research is to propose a
best reliable and practically applicable technique to treat the rising of damp.

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Problem statement  

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Rising of dampness is a major
issue   in old buildings. Over past few
decades several researches were carried out to find  the solution for this problem  and they have found some rectification
methods to  overcome this issue but  still authorities related these old buildings
are not satisfied with the  techniques
they have proposed. The rectification techniques that they have proposed are creating
a physical or chemical barrier, creating a potential against capillary potential,
applying atmospheric drainage, applying a coating with controlled porosity.
Especially in the case of old historical buildings techniques they have
proposed seems to be unsuitable. Still these authorities are short of better and
efficient treatment methods for rising of damp. Further research can be done on
this and practically suitable method for treating damp should be identified. In
the case of historical buildings, it is much needed for a new solution for this
issue.

 

Significance of the research

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Rising damp in old building will lead to many unfavorable
effects such as aesthetic degradation, degradation of ancient materials,
unsuitable indoor thermal-hygrometric conditions, poor thermal insulation of
external walls and decrease in mechanical performance of masonry. To
overcome   these issues several researches were done over
past few decades and researches came out with some techniques but still those techniques
fail to satisfy the needs completely. Creating damp proof course system is one
of the idea they have proposed but it is unsuitable due to aesthetic and structural
reasons. Creating water tight barriers causes stability problems. Creating
electric potential and installing atmospheric drainage siphons seems to ineffective
and We can’t apply coating  on walls
without rendering .This creates a need for a 
better technique   as the solution for the  rising of dampness.

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