Copper
Showing results 1-12 of 20
Profiled metal roofing – staining
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Run-off from lead flashings
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Soot or particulate emissions from nearby chimneys or flues
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Discharge onto the roof from a copper pipe, such as that from a hot water cylinder vent or from a pressure relief valve, or from copper piping in solar panels or air conditioning units
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Staining may be evidence of corrosion
Rust on zinc/aluminium or aluminium/zinc alloy-coated steel roofing
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Erosion of or scratching damage to the zinc/aluminium or aluminium/zinc alloy coating, exposing the steel
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Lack of rain washing. Rain washing tends to be less effective on roofs with less than 15 degrees slope
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Roofing metal is in contact with or has run-off from cedar or redwood, or timber treated with a copper-based preservative treatment
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Roofing has run-off from translucent (PVC) sheeting
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Corrosion of the steel in a corrosive environment such as near a swimming pool, or in coastal, industrial or geothermal regions
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Inadequately primed end and/or side laps
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Use of lead flashings
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The roofing is near the end of its serviceable life
Rust on alloy-coated pre-finished steel roofing
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Paint failure and subsequent erosion of or scratching damage to the zinc/aluminium or aluminium/zinc alloy coating, exposing the steel
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Roofing material is in contact with or has run-off from cedar or redwood, or timber treated with a copper-based preservative treatment
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The roofing has run-off from translucent (PVC) sheeting
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The roofing is near the end of its serviceable life
Solar water heater – water leaking from panel
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Frost damage has split pipes
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Failed brazed copper joints
Corrosion of roofing downstream from copper vent
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Dissimilar metal corrosion due to water flowing from copper vent onto an incompatible roofing metal
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Vent pipe not PVC sleeved
Roof space – water pipes leaking
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Pinhole corrosion in copper as result of carbon deposits in the pipe or high water pH
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Failed jointers in plastic or brazed joints in copper
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Rodents gnawing plastic
Zinc roofing – white surface corrosion
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Lack or rainwashing. Rain washing tends to be less effective on roofs with less than 15 degrees slope
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The roofing material is in contact with, or has run-off from, cedar or redwood, or timber treated with a copper-based preservative treatment
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The roofing has run-off from translucent (PVC) sheeting
Zinc roofing – holes
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Condensation is forming on the back of the zinc panels – pure water is very damaging to zinc
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Corrosion is initiated through the use of the wrong fixings
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The zinc is not isolated from the plywood substrate
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CCA (copper-based) treated plywood has been used
Copper roofing – uneven colour
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The amount of rainwashing across the roof surface varies and affects the development of the copper oxide or patina
Copper roofing – buckling
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Thermal movement is not being accommodated by the fixing system
Copper roofing – bent seams or joints
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Foot traffic on the roof
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The panels were damaged when installed
Copper roofing – dents
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Stones, balls, stone chips from vehicles, foot traffic on the roof
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The sheets were damaged during installation
