Showing results 1-12 of 14

Profiled metal roofing – staining

  • Run-off from lead flashings

    How to repair

  • Soot or particulate emissions from nearby chimneys or flues

    How to repair

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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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Corrosion of roofing downstream from copper vent

  • Dissimilar metal corrosion due to water flowing from copper vent onto an incompatible roofing metal 

    How to repair

  • Vent pipe not PVC sleeved

    How to repair

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 – holes

Copper roofing – uneven colour

  • The amount of rainwashing across the roof surface varies and affects the development of the copper oxide or patina

    How to repair

Copper roofing – buckling

  • Thermal movement is not being accommodated by the fixing system 

    How to repair

Copper roofing – bent seams or joints

Copper roofing – dents

  • Stones, balls, stone chips from vehicles, foot traffic on the roof

    How to repair

  • The sheets were damaged during installation

    How to repair

Copper cladding – dents/impact damage

Copper cladding – buckling