Lead
Showing results 1-6 of 6
Leadlight glazing: buckled/cracked/loose panes
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Old lead that has softened or weakened; impact damage
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
Profiled metal roofing – lead-head nails damaged or missing
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The lead heads were damaged during roofing installation
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Nails have worked loose over time as a result of movement in the roof
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
Concrete or clay tiles – lead flashing lifting
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Wind
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Lead flashing is of too light a grade
Roof flashings lifting
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Fixings have pulled out
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Insufficient number of fixings for the wind loads
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Lead or soft edging has torn or lifted
