Pimples or bumps behind wallpaper
We noticed these hard pimples underneath a window. Did some research and many said it was from water infiltrating and causing the glue to crystallize. We pulled the window and didn't see much evidence...
Forum Discussion
I have seen these same bumps in mine I think they are caused the solvents used to bond the wall paper to the inside wood as they flash off. Sometimes you can smell these solvents in a brand new MH.
