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Painted timber weatherboards – peeling or flaking paint

Painted timber weatherboards – bubbling or blistering of paint

  • Loss of adhesion due to excess moisture in substrate

    How to repair

  • Poor initial substrate preparation

    How to repair

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Timber weatherboards – joints opening

  • Thermal expansion and contraction of timber

    How to repair

  • Timber swelling/shrinkage caused by moisture absorption into end grain if joints were not adequately primed before installation and painting or staining

    How to repair

Paint failure at joints and external corners of timber weatherboards

Cupping of timber weatherboards

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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Timber weatherboards too close to or in ground contact

Leaking through timber weatherboard cladding

Split or cracked timber weatherboards

Cupping of stained or clear-finished timber weatherboards

  • Thermal expansion and contraction of timber

    How to repair

  • Swelling/shrinkage due to moisture absorption 

    How to repair

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Black staining on stained or clear-finished timber weatherboards

  • Mould growth on timber surface; occurs most commonly on south-facing walls

    How to repair

Deterioration of weatherboard surface under clear or stain finish

  • UV light deterioration

    How to repair

  • Cracking of the clear finish resulting in: moisture penetration and timber swelling mould growth loss of adhesion and flaking or peeling of finish 

    How to repair