A tin roof reflects the sun's rays away from your home, cooling both the roof and the inside of your home. The government's Energy Star program reports that it can reduce roof temperatures by as much as 100 degrees Fahrenheit. You can receive a tax credit for installing this type of roof due to the energy savings. In colder climates, the lack of friction on a tin roof allows snow to easily fall off the roof, preventing possible damage.
Most cities will allow you to place a tin roof on your home, though you'll need a building permit to do so. However, it's essential to call the city's zoning office to verify this before you make a purchase.
Homeowners and neighborhood associations often have strict rules regarding the exterior appearance of homes. Mother Earth News says that despite the environmental benefits of tin roofs, home buyers tend to prefer other types of roofs. Due to the lack of popularity, a homeowners or neighborhood association may have rules that prevent you from installing a tin roof on your home.
Tin roofs are more popular in some areas than others. If you live in an area where you don't often see a tin roof, you may have trouble finding a contractor who can install the roof the right way. In particular, it's important for your contractor to not mix materials, which can cause faster corrosion, and to properly ground the roof from lightning.