You using aluminum or steel? If it's roofing then I'm guessing galvanized aluminum? Looks to be around 25-26gu from the thinness of the edges. If these are aluminum, then I'm guessing they are pretty light. I made a pair for my girlfriend and they weigh in at extremely light, yet strong. I made another pair out of the same guage steel and they were over a pound each.
Lookin really really good man. You've definitely done a fine job on those gauntlets!!