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Gap between bottom aluminium window flange and cladding sealed

  • It was not installed correctly when constructed – the gap has been required under E2/AS1 for building work since 1992 to allow draining and drying around the window

    How to repair

Aluminium window flange is fitted tightly to direct-fixed cladding

  • It was not installed correctly when constructed – E2/AS1 for building work since 1992 has required that the window is installed with a 5 mm gap between the back of the flange and the cladding – the gap can be sealed down each side (jamb) of the window and left open across the sill

    How to repair

Leaking through stucco

EIFS – leaking through cladding

Profiled metal roofing buckling or twisting

  • Inadequate allowance for thermal movement at fixings – this occurs more commonly with dark coloured and aluminium roofs

    How to repair

Surface pitting of profiled metal aluminium roofing

  • The environment is corrosive (near the coast or industrial areas)

    How to repair

  • Surfaces (including the exposed underside of the roof at the eaves) are not effectively washed by rain. Rain washing tends to be less effective on roofs with less than 15 degrees slope.

    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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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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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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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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