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Crack(s) in foundation walls

  • Settlement due to ground subsidence or shrinking/expansion of clay soils

    How to repair

  • Insufficient depth of footings for ground conditions

    How to repair

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Rust stains on concrete/concrete block foundation walls

  • Poor quality concrete absorbing water that rusts the reinforcing, which in turns causes the concrete to spall or crack, allowing in more water 

    How to repair

  • The reinforcing was installed too close to the outer surface of the concrete

    How to repair

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Rotted baseboards or subfloor cladding

Rusting flashings and metal components

  • Air-borne salt, dust or dirt accumulating under flashings and metal components

    How to repair

  • Zinc (galvanizing) or aluminium/zinc or zinc/aluminiuim alloy coating has been scratched or eroded, exposing steel

    How to repair

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Rusty nail fixings on exterior walls

  • Heads of fixings are not protected by putty where punched and stopped 

    How to repair

  • Incorrect fixing type used for environmental conditions, cladding type or finish 

    How to repair

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Rot in timber weatherboards

  • Timber is or has been continuously damp

    How to repair

  • Timber was inadequately treated – radiata pine must be treated to H3.1 if painted and H3.2 if installed unpainted or stained

    How to repair

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Rot at base of timber weatherboard walls

Timber weatherboards too close to or in ground contact

Missing timber weatherboard(s)

  • Unfinished maintenance or renovation work, lack of maintenance

    How to repair

  • Boards rotted or split and have fallen out

    How to repair

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

Rot in stained or clear-finished timber weatherboards

  • Coating failure

    How to repair

  • Timber is or has been continuously damp

    How to repair

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Rot at base of stained or clear-finished timber weatherboard walls