Your roofing choice presents an opportunity to make a sustainable choice not only for your home, but also for your family and the world at large. Steel can be considered a sustainable building material meaning a material that reduces negative impacts on the environment, health, and comfort of building occupants.
Key to steel's sustainability is the fact that it has an unlimited lifespan and unlimited potential to be recycled. According to the Steel Recycling Institute, steel is the most recycled material in the world. More tons of steel are recycled annually in the United States than paper, plastic, aluminum, and glass combined. (Steel Recycling Institute, 2011)
Steel is Continuously Recyclable
Which means that it can be recycled repeatedly with no less of performance. (American Iron and Steel Institute, 2012) Steel is sustainable because the iron deposits that make up 5% of the earth's crust are less likely to be depleted due to the fact that steel is widely recycled.
Relative to other roofing material options, steel is also sustainable because it does not degrade in the same way organic roofing alternatives do. There are many facets to sustainability, so at the same time, the steel industry has been actively working to reduce greenhouse gas emissions and energy use in manufacturing, exceeding all regulatory requirements. In fact, according to the Steel Recycling Institute, "the industry has reduced energy intensity per ton of steel produced 27 percent and CO2 emissions by 33 percent per ton of steel shipped since 1990." (Steel Recycling Institute, 2011)
For all of these reasons, steel can be considered a sustainable choice for roofing.
Presidio Metal Roofing Brochure