Aluminium
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Gap between bottom aluminium window flange and cladding sealed
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It was not installed correctly when constructed – the gap has been required under E2/AS1 for building work since 1992 to allow draining and drying around the window
Aluminium window flange is fitted tightly to direct-fixed cladding
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It was not installed correctly when constructed
Leaking through stucco
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Cracks in the cladding systems
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Paint or sealant failure
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No cap or saddle flashings at junctions of parapet and balcony walls
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Junctions with other claddings and/or roof poorly detailed/constructed
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Omission of head flashings to doors/windows
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Minimal jamb flange cover of aluminium windows
EIFS – leaking through cladding
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Cracks in the cladding systems
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Paint or sealant failure
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No cap or saddle flashings at junctions of parapet and balcony walls
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Junctions with other claddings and/or roof poorly detailed/constructed
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Omission of head flashings to doors/windows
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Minimal jamb flange cover of aluminium windows
Aluminium joinery – pitting
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Exposure to air-borne salt, dust or dirt
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Run-off from cement plaster/grout, CCA-treated timber, copper or lead
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Lack of sufficient cleaning
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End of serviceable life – the expected life of anodised finishes is typically around 20 years but may be less in corrosive environments
Chalking of powder-coated finish on aluminium frames
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Exposure to air-borne salt, dust or dirt
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Lack of cleaning
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End of serviceable life - the expected life of powder-coated finishes is typically 12–20 years
Aluminium and PVC windows – loose or missing glazing seals
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Weathering, UV light exposure
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Incorrect length/size of glazing seal
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Glazing seals were stretched during installation
Aluminium or PVC windows – blocked drainage outlets
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Obstructions or dirt build-up
Sliding doors won't fully open
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There is an obstruction preventing them from opening
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For older units, there is wear on the rollers or track
Profiled metal roofing buckling or twisting
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Inadequate allowance for thermal movement at fixings – this occurs more commonly with dark coloured and aluminium roofs
Surface pitting of profiled metal aluminium roofing
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The environment is corrosive (near the coast or industrial areas)
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Surfaces (including the exposed underside of the roof at the eaves) are not effectively washed by rain. Rain washing tends to be less effective on roofs with less than 15 degrees slope.
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Bird droppings are not washed off by rain
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
