Comparison between energy requirement content*
for manufacturing various cladding materials
A study of the energy content of three cladding materials was done in the United Kingdom (UK) in 1979. The study started at the mines for the raw materials and ended at the building sites. All relevant and significant energy expenditures and credits were calculated. The study concluding as under:
“The Study determined that 16.42 kilowatthours (kWh) of energy was required to manufacture a square meter of corrugated asbestos cement sheet, 68.92 kWh was required for a square meter of corrugated alumimum sheeting , and 123.5 kWh was required for a square meter of plastic coated corrugated sheet steel (Schatzberger, 1979).”
The above study clearly establishes that to manufacture one square meter of plastic coated corrugated sheet steel the energy consumed is more than 7 times than that required to manufacture a square meter of corrugated asbestos cement sheet. Therefore, the manufacture and use of the AC sheets will leave much less carbon footprints as compared to the steel and other metallic sheets.
* Source: Mineral Commodity Profiles- Asbestos
U.S. Department of the Interior
U.S. Geological Survey