Your home probably already has drywall on all of the interior walls. Drywall can last for a very long time, and it can be painted or wallpapered over to give it the look that you want. There are cases when new drywall has to be installed, however. These are a few signs that you should work with a contractor who installs drywall. Then, you can get the help that you need with installing new drywall in your home.