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Crack(s) in foundation walls

  • Settlement due to ground subsidence or shrinking/expansion of clay soils

    How to repair

  • Insufficient depth of footings for ground conditions

    How to repair

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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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Rusting flashings and metal components

  • Air-borne salt, dust or dirt accumulating under flashings and metal components

    How to repair

  • Zinc (galvanizing) or aluminium/zinc or zinc/aluminiuim alloy coating has been scratched or eroded, exposing steel

    How to repair

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Rusty nail fixings on exterior walls

  • Heads of fixings are not protected by putty where punched and stopped 

    How to repair

  • Incorrect fixing type used for environmental conditions, cladding type or finish 

    How to repair

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Rust spotting on texture-coated fibre-cement cladding

  • Corrosion of fasteners where incorrect fasteners were used or the galvanised coating has been damaged during fixing 

    How to repair

Rust stains on stucco

  • Hairline cracking in the stucco admitting moisture causing corrosion of the reinforcing mesh 

    How to repair

Corroded metal roof flashings

  • Air-borne salt, dust or dirt accumulating under flashings

    How to repair

  • The paint finish has deteriorated, exposing steel 

    How to repair

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Profiled steel cladding – dust, dirt, air-borne salt

  • Lack of rain washing, or soffit prevents rain washing at top of walls

    How to repair

Profiled steel cladding – corrosion: white rust

  • Corrosion of the zinc when water is trapped between sheets at laps and joints, or during storage prior to installation

    How to repair

  • Insufficient rain washing 

    How to repair

Corrosion: red rust on galvanised mild steel cladding

  • Galvanised coating has eroded to expose bare metal

    How to repair

  • Profiled metal cladding is in contact with or has run-off from cedar or redwood, or timber treated with copper-based preservative treatment 

    How to repair

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Red rust on zinc/aluminium or aluminium/zinc alloy-coated steel

  • Corrosion of the steel when zinc/aluminium alloy coating has eroded to expose the steel

    How to repair

  • Cladding material in contact with or has run-off from cedar or redwood, or timber treated with a copper-based preservative treatment 

    How to repair

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