You don't always know what you have behind it.

We have recently started a new job and one of the clients asked to remove his wallpaper so that we could install a new one. What he didn't know was that behind the wallpaper there was mold & mildew on his entire wall.

To get rid of this we will have to apply special products that prevent moisture in the wall and apply a special paint that won't let out fumes that can be dangerous for who have children or pets.