Gutters
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Moss, mould or lichen on exterior walls
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Insufficient cleaning
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Walls and eaves are continuously damp due to heavy planting/overhanging trees/a bank in close proximity
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South walls are not exposed to direct sunlight
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High relative humidity
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Continuous wetting from an overflowing gutter or pipe
Moss or lichen on asbestos-cement cladding
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Insufficient cleaning
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Walls and eaves continuously damp due to heavy planting/overhanging trees/a bank in close proximity
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South walls not exposed to sunlight
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Continuous wetting from overflowing gutter or pipe
Timber slat decks – moss/mould/lichen growing on decking
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Insufficient cleaning
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The deck or balcony is continuously damp because of heavy planting, overhanging trees or a nearby steep bank
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The deck is continuously wet from an overflowing gutter or pipe
Verandas – water stains on soffit lining
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Rain blowing under the soffit/leaking roof above/overflowing gutters
Profiled metal roofing – rainwater runoff not draining into gutter
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Roofing stops short of gutter
Profiled metal roofing – swarf staining
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Swarf (residual fragments of steel from cutting, drilling or grinding roofing sheets) have been left on the roofing or in gutters
Roof leaks (visible as wet framing or water path stains)
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Cracked, missing or dislodged tiles or shingles, or corroded metal roofing
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Roofing sheets do not have turn-ups to the top end
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Missing nail heads or waterproofing washers
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Flashing has lifted, corroded or been damaged
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Corroded, damaged or blocked valley or internal gutters
Metal tile roofs – water does not drain into gutter
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Tiles stop short of the gutter
Concrete or clay tiles – corroded valley gutters
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Accumulation of dirt and moisture
Corroded metal roof flashings
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Air-borne salt, dust or dirt accumulating under flashings
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The paint finish has deteriorated, exposing steel
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Loss or breakdown of stone chip coating (pressed metal tile roofing flashing)
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Loss of galvanising or zinc/aluminium alloy coating exposing the base metal
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Run-off from incompatible materials such as glass or plastic roofing
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Run-off from cement-based mortar (tiled roofs)
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Acidic run-off from uncoated cedar wall cladding
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Debris or swarf (metal filings and chips) accumulated in valley gutters
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Moisture being held within the lapped joints
External gutters – water spilling from gutter
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Insufficient or no fall to outlet
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Leaves, other debris or weeds growing in the gutter retain moisture and prevent water from draining away
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Blocked outlet to downpipe
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Blocked downpipe
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Sagging guttering results in ponding and water being unable to drain away
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Distortion of gutter that is fitted tightly between fascia boards and unable to expand
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Lip at the outlet of the gutter prevents water from fully draining away
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Hail/ice/snow blockage
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Downpipe too small for area served
Sagging external gutter
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Insufficient number of brackets
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Corroded (metal) or broken (plastic) brackets
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Gutter not draining
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Snow or hail