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Damp: Rising damp, penetrating damp and condensation
Published in Duncan Marshall, Derek Worthing, Roger Heath, Nigel Dann, Understanding Housing Defects, 2013
Duncan Marshall, Derek Worthing, Roger Heath, Nigel Dann
When functioning correctly, DPCs provide an effective barrier to rising damp. However, DPCs can fail for a number of reasons. These include deterioration of the original material or physical damage caused by building movement. Early DPCs included tar and sand, lead, copper, bitumen felt, lead cored felt, asphalt, slate and engineering bricks. Some of these materials are quite brittle and even minor building movement can cause damage. However, in many cases, rising damp is caused by bridging of the DPC or changes in ground water levels, rather than failure of DPC material. The diagrams below show a number of ways in which DPC bridging can occur.
Exterior Enclosure Components
Published in Kathleen Hess-Kosa, Building Materials, 2017
Be forewarned! Manufactured masonry products are generally intended for above grade installations. Regardless of their composition, masonry products are inherently absorptive, and as such, are not intended for use below grade or in contact with wet soil or mulch. These conditions will create a “rising damp”—a slow upward movement of water in the wall and moisture penetration into the lower wall cavities.
Guidance on the common damp problems
Published in Ralph Burkinshaw, How to Investigate Damp, 2020
The term is defined in our glossary as follows: Rising damp occurs when moisture travels upwards against the forces of gravity, typically up a wall or through a floor, from its source below the ground.
Influence of hydraulic contact interface on drying process of masonry walls
Published in Drying Technology, 2020
J. M. P. Q. Delgado, A. C. Azevedo, A. S. Guimarães
Moisture transfer in construction building components is fundamental for the durability of built elements, influencing the thermal behavior and consequently the energy consumption in the building and occupants’ health by the air quality.[1] There are such of demonstrative problems due to moisture like frost/defrost damage in facades (outside), mold on interior surfaces (inside), fungus in floors and walls by rising damp (bottom), deterioration in floors and walls by food occurrences (bottom), degradation of walls and roofs by internal condensations (inside the element), etc. The solutions for treating this kind of pathologies are complex and of difficult implementation.[2]
Ermanno Grinzato and the humidity assessment in porous building materials: retrospective and new achievements
Published in Quantitative InfraRed Thermography Journal, 2023
P. Bison, A. Bortolin, G. Cadelano, G. Ferrarini, M. Girotto, E. Guolo, F. Peron, M. Volinia
The IR thermography was used by Ermanno Grinzato to obtain a quantitative description of the presence of moisture in the building, either from condensation and/or rising damp problems [24]. Following his traces, in order to study rising dampness in typical Venetian masonries [25,26], full-scale masonry models have been set up in the Building Physics Laboratory of IUAV University of Venice to define a measurement methodology and data analysis praxis to monitor precisely with IR thermography the humid areas [27] (Figure 15).