Rot
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Rotted baseboards or subfloor cladding
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Soil or mulch has been built up against the timber
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Planting and foliage are restricting air flow and keeping the cladding damp
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The timber used was untreated
Rot in timber weatherboards
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Timber is or has been continuously damp
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Timber was inadequately treated – radiata pine must be treated to H3.1 if painted and H3.2 if installed unpainted or stained
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Non-durable or untreated timber was used – timbers such as cedar and heart macrocarpa may be untreated but they must not be continuously wet in use
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Paint coating has failed
Rot at base of timber weatherboard walls
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Boards are covered by soil or foliage
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Boards have had concrete poured against them or are touching the ground
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Boards were not primed and painted along the bottom edge
Timber weatherboards too close to or in ground contact
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Weatherboards were originally installed too close to the ground
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Gardens have been built up
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Path or paving has been laid against the cladding
Missing timber weatherboard(s)
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Unfinished maintenance or renovation work, lack of maintenance
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Boards rotted or split and have fallen out
Rot in stained or clear-finished timber weatherboards
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Coating failure
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Timber is or has been continuously damp
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Inadequately treated timber – radiata pine must be treated to H3.2 if stained or clear finished stained
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Non-durable or untreated timber used – timbers such as cedar and heart macrocarpa may be untreated but they must not be continuously wet in use
Plywood cladding – paint failure at base of walls
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Cladding covered by soil/foliage
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The back surface of boards too close to the ground, not sealed and absorbing moisture
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Concrete has been placed up to and against cladding
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High subfloor moisture levels behind the cladding
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Bottom of cladding too close to waterproof deck surface, apron flashing and absorbing moisture
Timber trims – rotting battens or cover boards
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Timber is or has been continuously damp
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Inadequately treated timber
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Non-durable or untreated timber used
Timber slat decks – split/damaged/rotten decking
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The timber treatment was not adequate for the exposure
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The timber is at the end of its serviceable life
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Moisture remains trapped in the junctions of decking with framing
Timber slat decks – rot to deck joists/bearers
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The timber treatment was not adequate
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The timber is at the end of its serviceable life
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Moisture remains trapped in the junctions of framing
Timber deck posts – rot at base
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The timber treatment was not adequate for the location
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An H4 timber post was encased in concrete or in ground contact at the base
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Moisture was trapped at the base of the posts
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The timber is at the end of its serviceable life
Deck balusters/posts, balustrades and barriers – insecure when pressure is applied
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Rotten timber
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Fixings have pulled out or corroded
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The barrier structure is inadequate (undersized framing or framing support too far apart)
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Deck baluster/balustrade/post fixings are loose
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The baluster/balustrade/post fixings to the deck are inadequate
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Deck barrier does not meet with current Building Code requirements
