Hello, my husband and I recently bought a home on 4 acres and were told it was a stick built home. Does a double wide always have metal chassis? Or will it be wood foundation with cement footers that is what we have underneath the house but no steel anywhere. We have a crawl space and attic, there are no signs of it being mobile on the inside but the outside is what bothers me. I look underneath and it has cedar blocks holding it up. How can I tell the difference between a modular and mobile/ double wide? Will it always have the steel running down the center? We also have 2x6 walls that make my father in law think it is a modular.