Corrosion
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Swimming pool pipes, fittings, connectors corroded
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Corrosive pool environment
Swimming pool – concrete wall cracking/deterioration
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Soil subsidence under/against pool
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Poor design or installation
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Changes in soil moisture or groundwater levels
Swimming pool vinyl liner ripples/distortion/degradation
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Liner not installed correctly
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Age/degradation - shrinkage, wrinkling
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Corroded galvanised steel supports
Electrical connections to pool filter pumps loose/poorly connected
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Vibration
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Poor installation
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Corrosion of connections
Crack(s) in foundation walls
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Settlement due to ground subsidence or shrinking/expansion of clay soils
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Insufficient depth of footings for ground conditions
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Poor quality concrete or insufficient concrete cover of the reinforcing steel resulting in corrosion of the reinforcing causing the concrete to crack
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Frost damage – water that gets into small cracks in concrete expands as it freezes, enlarging the cracks
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The wall has been undermined by basement excavations
Rust stains on concrete/concrete block foundation walls
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Poor quality concrete absorbing water that rusts the reinforcing, which in turns causes the concrete to spall or crack, allowing in more water
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The reinforcing was installed too close to the outer surface of the concrete
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The building is close to the sea and the concrete is of poorer quality
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The concrete is low strength
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Moisture is rising up from the ground
Rusting flashings and metal components
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Air-borne salt, dust or dirt accumulating under flashings and metal components
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Zinc (galvanizing) or aluminium/zinc or zinc/aluminiuim alloy coating has been scratched or eroded, exposing steel
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Acidic leachate from cedar or H4-treated timber (containing copper-based preservatives)
Rusty nail fixings on exterior walls
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Heads of fixings are not protected by putty where punched and stopped
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Incorrect fixing type used for environmental conditions, cladding type or finish
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Rust was not cleaned off fixings before re-stopping/repainting
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Inadequate paint finish to provide protection
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Acidic leachate from cedar or H4-treated timber (containing copper-based preservatives)
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Corrosion protection of fixings (such as zinc) was damaged during installation
Rust spotting on texture-coated fibre-cement cladding
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Corrosion of fasteners where incorrect fasteners were used or the galvanised coating has been damaged during fixing
Rust stains on stucco
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Hairline cracking in the stucco admitting moisture causing corrosion of the reinforcing mesh
Corroded balustrade fixings/support brackets for timber balustrades
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Exposure to air-borne salt, dust or dirt
Veranda beams and posts – rusting of brackets/bolts
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Insufficient corrosion protection for the environment
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Lack of cleaning and/or coating maintenance on painted non-galvanised brackets
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Erosion of galvanising