Hello all. I have a 2016 Coachmen Ultra Lite expandable trailer. The lower floor has rotted out due to water damage. Has anyone dealt with this issue and how was it resolved? The original construction seems to be 1/4 plywood as a bottom layer followed by styrofoam insulation and then another layer of 1/4 plywood on top followed by vinyl flooring. It’s the very first layer which is exposed to the outside that has rotted away.