by Steve_Cox » Fri Mar 07, 2008 9:31 pm
A lot of travel trailer manufacturers wrap their plywood floor in a sheet of nylon reinforced plastic. I have found that it is a great place to trap water in the few trailers I have had experience with. Leaky doors or windows, the water gets trapped in the plastic sheet under the floor. Leaking sink or shower drains, again the plastic sheet can catch and hold the water. It always leads to the floor delaminating. I like the way most tear droppers do it better. Some use epoxy, others use a roof coating, while some just use paint. My plywood floor was encapsulated in epoxy.
Steve