Lifetime of Materials
From Open Source Ecology
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]
