Waterproofing concrete: Is it necessary to make concrete waterproof?
Waterproofing protects your structure and its contents from moisture, humidity, and flooding damage. Although waterproofing systems are a small part of an entire construction project, the cost of remediation can be enormous if the wrong solution is chosen or improperly installed.
Since 1996, the waterproofing of wet areas has been regulated by the relevant Australian Standard AS:3740 (Waterproofing of Wet Areas).
During the construction phase, all wet area waterproofing work must be carried out by a QBCC-approved contractor (waterproofer).
As an Australian citizen, one needs to know the required regulations for waterproofing and how it works.
Risk of water intrusion
Typically, much more water is used in concrete than is needed to hydrate the cement. This excess water occupies space in the concrete and forms a network of capillary voids.
This creates channels through which water can enter the concrete when subjected to hydrostatic pressure or capillary action. The risk of water infiltration is even greater if the foundation is built at or near the water table or in areas with heavy soil that tends to carry more moisture.
Making waterproof concrete
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