[JRTJH]

I agree with Chip. It's been about 5 or 6 years that the manufacturers have been using what Keystone calls "Helium technology" to reduce trailer weight by as much as 2,000 pounds... Part of that is the foam laminated floors in the light weight trailers. It sounded good back then, but now that they've been in use for a while, it sounds like we're hearing more and more reports of "spongy" or "soft spots" on the floors.

It could be water damage, but I wonder if some of the complaints might stem from the floor "delaminating" in areas of heavy use by "heavy footed users".... Areas like the "jumping off spot" for kids to get out of their bunks, the space right in front of the kitchen sink and stove, or areas where people stand and put a lot of weight on a small "footprint" of the floor.....

The construction is typically either a 1/4" OSB top layer glued to 1.5" of white construction foam and the bottom is a 1/8" luan panel. On some models, manufacturers opted to glue two of the 1/8" luan panels to form a 1/4" top panel.

So, if you can imagine "stomping" on a sheet of 1/4" OSB in the same spot for several years, that may be what you'll find rather than water damage... Be sure to let us know what you find because several members are facing the same situation and it may not be water leaks.....