Common
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Swimming pool distortion when empty of water
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Soil/ground water pressure on pool which is greater than weight of empty pool
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
Swimming pool filter pumps not working
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Circuit overloaded and fuse blown or circuit breaker tripped (often due to damp environment)
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Pump failed
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Filters blocked
Concrete floor slabs – not enough ground clearance to floor level
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Age of the house (limited ground clearance was permitted in the past)
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Sufficient clearance was not provided when the slab was poured
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The surrounding ground level has been built up over time
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
Blocked ventilation openings in foundation walls
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The soil level has been built up, covering ventilation openings
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Paving covers or partly covers the ventilation openings
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Planting and foliage restrict air flow through ventilation openings
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There is an insufficient number or size of ventilation openings for the subfloor area
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There is a build up of paint on ventilation grilles reducing air flow
Blocked drainage slots along bottom of drained cavity cladding
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Gardens built up against the cladding
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Build-up of dust/sand/dirt/debris from insects in the bottom of the cavity
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
Framing outline is visible on the cladding on cold mornings
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Condensation is forming on cladding where there is insufficient or no insulation
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Condensation forming at the framing locations when the wall is well insulated due to thermal bridging of the framing
No head flashing to window/door openings
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It was not installed when constructed – for a period during the 1970s and 1980s sealant was sometimes used rather than a metal head flashing
Painted timber weatherboards – paint chalking
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Weathering, UV light exposure – chalking will be more visible with darker colours
Painted timber weatherboards – paint failure at base of walls
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Cladding covered by soil/foliage
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The back surface of boards is 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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There are high sub-floor moisture levels behind the cladding
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The bottom of the cladding is too close to a waterproof deck surface, apron flashing and absorbing moisture