Metal Vertical Walls
Ti, Al, and Cu are all excellent options for siding. These natural elements are nontoxic (you probably ate some copper in your cereal this morning) and easily recycled. But for us, copper takes the cake because of its chameleonic qualities and 200-to-300-year life span. While the investment clearly pays off, it's still a more expensive option than vinyl, but family-run Zappone supports DIY customers with an installation guide for their interlocking system, which will cut down on cost if you're willing to sweat.