Underside shielding on motorhome

AikenRacer wrote:
Just got home from a short trip. Saw a piece of aluminum sheet metal underneath that was dragging on the road. Pulled it out and investigated. There is a similar sheet of aluminum underneath the fresh water tank that is rusted on the edges. The bad sheet was under the black/gray tank and fell out due to rust. Trying to find out the purpose of these aluminum sheets. If they are for protection, they are very thin and don't seem to be heavy enough. Taking the RV to a repair shop to see what needs to be done. Also noticed that the liquid tanks bulge some at the bottom....just wondering if that is normal and why they would not brace them better....any comments...

And that's all there is between these tanks and the outside atmosphere?
They don't seem to be made of alum. either and more like galvanized sheet metal, otherwise they wouldn't be rusting.
As for your question, I think it's already been answered in one form or the other.