We had this on our 2003 Mountaineer and while it did help with heat loss through the floor, it was a true pain when anything went wrong under the trailer. And believe me, plenty can go wrong from simple wiring issues to plumbing leaks. It took me over an hour to scrape away only 6 square inches of foam.
I would not do it again.
I do recommend going through your trailer and filling all voids and penetrations through the floor with expanding foam to seal it up better than it comes from the factory.
Edited by: Canucklehead
Bumper hitch for triple tow
2011 F350 6.7L SRW Lariat