Showing results 1-12 of 20

Staining around nail holes in timber weatherboards

  • Rust staining from mild steel or hot-dip galvanised nails 

    How to repair

  • Staining from hot-dip galvanised, copper or aluminium nails in cedar (typically a teardrop-shaped stain)

    How to repair

Plywood cladding – staining around nail holes

  • Rust staining from mild steel or hot-dip galvanised nails 

    How to repair

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 spotting on asbestos-cement cladding

  • Corrosion of fasteners where incorrect fastener used or 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

Galvanised steel profiled metal roofing – white rust

  • The zinc coating has corroded when water is trapped between sheets at laps and joints. This may occur during roofing installation or during storage before installation

    How to repair

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

    How to repair

Galvanised steel profiled metal roofing – red rust

  • Erosion or scratching damage of the galvanising, exposing the steel

    How to repair

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

    How to repair

  • View all repairs

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

  • View all repairs

Profiled metal roofing – corrosion at lapped ends

  • The underside (back surface) of the edges of sheets have not been primed and do not get cleaned

    How to repair

  • Water trapped in end laps 

    How to repair

Galvanised steel roofing – corrosion at roofing sheet ends

  • The underside (back surface) of the edges of sheets have not been primed and do not get cleaned

    How to repair

  • There is a moist corrosive environment, as water likely to remain in the gutter  

    How to repair

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

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

    How to repair