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Blocked ventilation openings in foundation walls

  • The soil level has been built up, covering ventilation openings

    How to repair

  • Paving covers or partly covers the ventilation openings

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Subfloor – ponding water

  • Surface water flowing underneath the building if the subfloor ground level is lower than the ground or paving outside building perimeter, or if the ground slopes towards the building instead of away from it

    How to repair

  • Blocked or overflowing stormwater drain or gulley trap discharging water under the house

    How to repair

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Rust stains on inside of foundation walls

  • Poor quality concrete absorbing water which rusts the reinforcing, which in turns causes concrete to spall or crack allowing in more water 

    How to repair

  • Reinforcing installed too close to the outer surface of the concrete

    How to repair

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