Showing results 1-12 of 20

Rust on zinc/aluminium or aluminium/zinc alloy-coated steel roofing

  • Erosion of or scratching damage to the zinc/aluminium or aluminium/zinc alloy coating, exposing the steel

    How to repair

  • Lack of rain washing. Rain washing tends to be less effective on roofs with less than 15 degrees slope

    How to repair

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Rust on alloy-coated pre-finished steel roofing

  • Paint failure and subsequent erosion of or scratching damage to the zinc/aluminium or aluminium/zinc alloy coating, exposing the steel

    How to repair

  • Roofing material is 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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Metal tile roofs – corrosion

  • Loss or breakdown of the stone chip coating or paint coating

    How to repair

  • Air-borne salt accumulating under tiles, particularly where tiles are damaged 

    How to repair

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Zinc roofing – white surface corrosion

  • Lack or rainwashing. Rain washing tends to be less effective on roofs with less than 15 degrees slope

    How to repair

  • The roofing material is 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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Zinc roofing – buckling

  • Thermal movement in the roofing is not being accommodated by the fixing system 

    How to repair

Zinc roofing – bent seams or joints

Zinc roofing – uneven colour

  • Some parts of the roof area are more exposed to the weather or rainwashing, which slows the development of the traditional zinc oxide on the surface 

    How to repair

Zinc roofing – holes

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 – 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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