The damp corners of the basement walls, dripping water from the garage roof, and peeling of the roof during the rainy season can easily lead people to think: Is concrete inherently prone to leakage? Even though they are made of concrete, water tanks, subway side walls, and underground garage exterior walls can also provide long-term water retention.
The difference lies not only in the waterproofing membrane, but also in whether the concrete itself has sufficient impermeability.
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