Lifetime of Materials

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Galvanized + Metal

  • 55+ years for 2.5 mil of HDG coat [1]
  • Structural HDG steel - 73 years to first maintenance [2]
  • Wire - 100 years for copper, 80 years for aluminum [3]

Plastic

  • This site claims 20 yr RPE life even in full sun - [4]
  • Butyl tape - 10 years [5]
  • EPDM roofing - 12 years per 45 mil [6]
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