A screen door is a nice addition to your home since it lets a breeze in on a cool day while keeping bugs out. Screens last a long time unless a pet scratches on them constantly, but some damage is likely as a screen ages due to daily wear and tear as your family uses the door. The screen might develop small or large holes or even rips. Repairs need to be done or you won't be able to use the door without the risk of mosquitoes, flies, and other bugs getting inside.