Metal roofing can consist of a high percentage of recycled material and is 100% recyclable.^[8] It does not get as hot asasphalt, a common roofing material, and it reflects heat away from the building underneath in summertime. On a larger scale, its use reduces the heat island effect of cities when compared to asphalt.
1 easy to install 
2 various of models 
3 light weight,high strength and durable 
4 low cost