Will a Steel Roofing System Make my Residence Hotter?
https://super-wiki.win/index.php/Insurance_Policy_Price_Cuts_for_Metal_Roof_Coverings:_Conserve_Power_and_Money_with_Steel
This lower melting point implies that refining the Zinc for use as a building material requires as much as a 1/4 of the energy that it requires to refine steel or copper. Zinc is likewise 100% available and recyclable