 to the home and consider that. And, of course, the insulation choice, spray foam, a great one. By the way, though, if you are going to go with metal, it's recommended that you use closed-cell spray foam insulation because it's more waterproof. It has a vapor barrier built into it. Not all open-cell spray foam gives you a vapor barrier protection the same way closed-cell would. So if it's metal, I would definitely go closed-cell.