A metal roof is a roofing system made from metal pieces or tiles. It is a component of the building envelope. One of the main disadvantages of a metal roof is the noise created when it rains outside.
Metal roofing can consist of a high percentage of recycled material and is 100% recyclable
It does not get as hot as asphalt, a common roofing material, and it reflects heat away from the building underneath in summertime.
which provides an air gap between the plywood roof and the metal. Cool-color metals are light, reflective colors, like white. The study went on to say that re-sealing and insulating air ducts in the attic will save even more money
Originally, metal roofs were made of corrugated galvanized steel: a wrought iron–steel sheet was coated with zinc and then roll-formed into corrugated sheets.