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Rust stains on concrete/concrete block foundation walls

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

    How to repair

  • The reinforcing was installed too close to the outer surface of the concrete

    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

  • View all repairs

Moisture entry through retaining foundation walls

  • Ground moisture has moved through a retaining wall as it is unlikely the wall will have been waterproofed, and there is: no perforated drainage pipe at the base of the wall for ground water removal no drainage gravel above the drain, resulting in the drainage pipe becoming blocked with silt no filter fabric between drainage gravel and the drain, resulting in the drainage pipe becoming blocked with silt the drainage behind the wall has stopped working due to the pipe being blocked or the drainage gravel becoming filled with fine soil material

    How to repair

Concrete/concrete block – stains

Concrete/concrete block – flaking paint

Lightweight aerated concrete panels/blocks – chalking paint

  • Weathering, UV light exposure – chalking will be more visible with darker colours

    How to repair

Lightweight aerated concrete panels/blocks – fading paint

  • Weathering UV light exposure – darker colours are more prone to fading 

    How to repair

Lightweight aerated concrete – peeling or flaking paint

Lightweight aerated concrete – bubbling or blistering paint

Lightweight aerated concrete – paint failure at base of walls