I am considering a vertical antenna (steppir perhaps) for my office. It's only 1 mile from my house and I could have an HF setup there as opposed to my house which has many obstacles (small yard, neighbors, my wife...). On Steppir's website they make a reference to a metal roof being a good ground replacement for radials and a great counterpoise. I'm wondering if anyone has done this before? My warehouse has an old, somewhat rusty galvanized standing seam roof and my office has a corrugated metal roof. I could use either building, but the office makes more sense since it has internet and I can envision remote access etc...
Is this realistic or just advertising? Any reliable way to know if this was going to work?
Thoughts are appreciated,