There are many reasons in order to use door barriers but one reason that has saved many dwelling are the flood shield door barriers. These barriers are portable and ready to use whenever your home might be in danger of a flood. They have a unique system to where when you put them at your doorway, they will suction themselves to the door in order to keep out any water that may want to come in. They will keep you safe from flood water that could get up to 560mm which is usually about half way up the door. These barriers could help save your home in a disaster.