Corrosion of roofing downstream from copper vent

Causes

Dissimilar metal corrosion due to water flowing from copper vent onto an incompatible roofing metal 

Vent pipe not PVC sleeved

Listed under: metal, copper, steel, Roof, cladding, durability, corrosion, roof cladding, profiled metal, zinc roofing

Cause

Dissimilar metal corrosion due to water flowing from copper vent onto an incompatible roofing metal 

Repair

  • readjust water supply valves or cylinder thermostat to limit overflowing – call a plumber if unsure how to do this
  • clean down and paint corroded roofing

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Cause

Vent pipe not PVC sleeved

Repair

  • readjust water supply valves or cylinder thermostat to limit overflowing – call a plumber if unsure how to do this
  • clean down and paint corroded roofing
  • sleeve copper vent pipe if exposed

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