The top layer in a Forest River laminated floor is 8mm Luan plywood and is sourced from China. Its roughly 5/16" thick. The foam and aluminum tube in the middle of the sandwich are 1-1/2". The bottom layer of luan plywood is 3mm thick, roughly 1/8".
Those floors are great until they're not. They tend to fail at high travel / traffic areas. At the entrance door, in front of the sink, in the bathrooms. The foam compresses and the adhesives fail. If the owner/users are of great bulk, good luck.
Some Forest River brands / divisions stopped using the laminated floors altogether, an example is Rockwood/Flagstaff. They switched to 5/8 tongue and groove plywood floors (not OSB) mid way through the 2017 model year. Laminated floors are garbage.
