Is metal roofing a good green upgrade project?
Where can I get information on what products are best in terms of cost and durability? I am aiming for long-term "payback" because not all remodeling projects give a best return on investment.
A metal roof is an excellent choice. This type of roof sheathing will last the longest. Recycled content is always a part of metal products these days. If you're pulling the decking off too, make sure you close off your attic and apply spray foam insulation to the underside of the decking. You don't want a vented attic.
You can also easily put on a thin-film PV system to standing seam roofs.