I have disassembled my 1967 Ritz-Craft 150 to the frame. The flooring was rotted and the moisture barrier was lose and sagging. I need to replace the material was used for the first layer to the ground under the flooring. It looked like a tar paper that had vinyl on the ground side, the the floor joists were on top of that. Does anyone have any suggestions what to use as the lower most moisture barrier? Does anyone remember what they used and how well it performed?
Any and all help is greatly appreciated... thanks!