Rising dampness in masonry wallscauses vexatious issues to the old buildings especially for historical buildings.Upward movement of moisture through the walls by capillary action is calledrising of damp. Rising of soluble salts due to dampness may lead to lots ofpathologies. Aesthetic degradation and structural damage to exterior part ofbuildings are serious effects due to this issue. This creates an unpleasant environmentfor the people who are living there.
Rising of damp is an serious issue especiallyin historical buildings. Even though construction field has developed immenselyover past decades this issue is still there in newly built buildings. So thereis a need for a proper rectification method for rising of damp. Presence ofmoisture in buildings may occur due to various ways such as infiltration fromroofs, pipe leakages, condensation, and capillary rise from soil, flooding, andpoor drainage. Rising damp is one of the most wide spread phenomenon responsiblefor the presence of moisture in buildings. It is one of the persistentproblem which requires much effort and financial resources for it’s rectification.Removal of rising damp in historically important building and old structures isextremely difficult and undeniably a challenging task due to the restrictionsrelated to historical buildings, characteristics of masonry and aestheticconstraints. Removal of rising damp from historical buildings is still remainsas a challenging task and the authorities related to these buildings are stillshort of efficient and reliable techniques to treat the rising of damp.
Thetechniques that are already in use are ineffective so an effective reliable techniquefor dehumidification of masonries is much needed. This research is to propose abest reliable and practically applicable technique to treat the rising of damp. Problem statement ___________________________________________________________________ Rising of dampness is a majorissue in old buildings. Over past fewdecades several researches were carried out to find the solution for this problem and they have found some rectificationmethods to overcome this issue but still authorities related these old buildingsare not satisfied with the techniquesthey have proposed. The rectification techniques that they have proposed are creatinga 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 haveproposed seems to be unsuitable. Still these authorities are short of better andefficient treatment methods for rising of damp. Further research can be done onthis and practically suitable method for treating damp should be identified.
Inthe case of historical buildings, it is much needed for a new solution for thisissue. Significance of the research___________________________________________________________________ Rising damp in old building will lead to many unfavorableeffects such as aesthetic degradation, degradation of ancient materials,unsuitable indoor thermal-hygrometric conditions, poor thermal insulation ofexternal walls and decrease in mechanical performance of masonry. Toovercome these issues several researches were done overpast few decades and researches came out with some techniques but still those techniquesfail to satisfy the needs completely. Creating damp proof course system is oneof the idea they have proposed but it is unsuitable due to aesthetic and structuralreasons. Creating water tight barriers causes stability problems. Creatingelectric potential and installing atmospheric drainage siphons seems to ineffectiveand We can’t apply coating on wallswithout rendering .This creates a need for a better technique as the solution for the rising of dampness.