ABSENCE OF DAMP-PROOF COURSE
The damp-proof course, or capillary break, of which old buildings are often deprived, is laid on the upper course of the footing of a masonry work as a basis for the rest of the building (see diagram above).
MINERAL SALTS ANALYSIS
Mineral salts, such as sulphate and nitrate, are carried along with capillary rising damp, which is why materials must be tested for the presence of salts (salt indicators) (see picture above).
Due to friction, the water running in the fracture lines generates an electric charge that can be measured with a voltmeter.
(see picture above)
IRREGULAR DAMP LINE
The damp line is generally shaped as a 5- to 7-foot-high wave.
The moisture meter can be used to measure the moisture present in materials.
Measuring damp using the “carbide bomb” test is essential to assess water content in the materials and have a trustworthy reading to plan the restoration work.
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