Showing results 1-5 of 5

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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Corroded metal flashings on shingle roof

  • Acidic leachate from cedar or H4-treated timber shingles (containing copper-based preservatives)

    How to repair

  • Air-borne salt, dust or dirt accumulating on or under the flashing

    How to repair

Resin appearing on surface of timber weatherboards

  • Preservative treatment solvents causing resin bleeding in the timber, particularly pinus radiata timber where the treatment is light organic solvent preservative-treated (LOSP) 

    How to repair

  • Changes of temperature of timber, particularly where darker-coloured paint finishes have been used

    How to repair