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This picture shows the foundation installed on impervious soil (clay)
where water ponding is approximately
4" deep.
Concrete is hygroscopic, adsorbing
moisture from adjacent soils and water ponds. This moisture
wicks through the concrete where it diffuses into the
interior of the building, leading to excess humidity, chronic
dampness and mold.
Concrete footings, located at the bottom of the excavation, are exposed to water
ponding, the severest form of moisture contact.
The contractor will soon apply a dampproof coating to the foundation wall
and install drain pipe and 150mm of drain rock. However these
measures will not prevent water ponding and the building
suffer from rising damp for the rest of its life.
For additional information on water ponding and its prevention, click on the links below:
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