There might be mold behind walls. How do you get the walls down? Are they glued or nailed or screws? Has anyone had to clean up mold and how did you do it?
Is your trailer a towlite or a classic? Our is a classic and here is our story. Wall damage 6-10-2014. This will give you the link to the photo bucket picture and word story. If it is a classic then I could advise you.