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
Rather than water, I'd rather think the chemicals in the wall construction (traces of chemical moisture, not necessarily water), heated up and came to a boiling point. Remember, different chemicals have different boiling points, some much lower than 212 the temperature for water.
It's possible there was a chemical reaction, which resulted in a "boiling", thus the bubbles, and like someone else said, it then crystallized. I'm just guessing here. Not every blemish in an RV is the result of "water damage."
It's possible there was a chemical reaction, which resulted in a "boiling", thus the bubbles, and like someone else said, it then crystallized. I'm just guessing here. Not every blemish in an RV is the result of "water damage."
