Hi, I am looking at 1992 Coleman Pioneer series. I crawled under it and looked at the subfloor and it seemed fine, poked at each corner and it was solid on all 4. However....... inside front corner under the sink/stove cabinet there is a soft spot, not big, but finitely got some water damage. Question: How are the floors built in these? Is it a single layer of OSB or is there an inner and an outer layer? I rechecked the exterior corner again and it was fine. Any insight is appreciated. Thanks!