by Cougarfan » Sun Mar 23, 2025 1:58 pm
Hi Barbie,
That is called Coroplast. All it does is cover the underside of your trailer but does not add any insulation value and is really just plastic corrugated cardboard. I think in the description of trailers it is listed as "enclosed underbelly". I had it on my last trailer but still nearly froze to death when I lived in it during the winter (I didn't have any insulation in the floor since it wasn't a 4-season trailer). It does protect everything under the trailer (plumbing, electrical, etc) from road debris while you're traveling and help keep rodents out. Just make sure any openings through it are sealed well.
I wouldn't mess with it but if you do need any work done under the trailer, it will need to be removed although some technicians can just cut a hole to make the repair and then patch it. I don't think it is expensive to replace if something happens to it.
Laura