Zinc roofing – white surface corrosion
Causes
Listed under: metal, copper, zinc, plastic, polyvinyl chloride (PVC), timber and wood-based, timber, Roof, cladding, durability, corrosion, roof cladding, translucent sheets, zinc roofing
Cause
Lack or rainwashing. Rain washing tends to be less effective on roofs with less than 15 degrees slope
Repair
- wash down and begin a regular cleaning programme. Replace seriously degraded panels
Cause
The roofing material is in contact with, or has run-off from, cedar or redwood, or timber treated with a copper-based preservative treatment
Repair
- wash down and begin a regular cleaning programme. Replace seriously degraded panels
Cause
The roofing has run-off from translucent (PVC) sheeting
Repair
- wash down and begin a regular cleaning programme. Replace seriously degraded panels