You cannot ignore the fact that your address plaque for house may be insecure outside if there is no safety measure taken. The metal that is used in the plaque is expensive and it takes an effort to integrate the metal numbers onto the plaque. So you would like your plaque to be your representative and at the same time it should be secure outside your house. There are different approaches with which you can make your plaque safe and sound. Chose a location that is not easily accessible and secondly you should use proper screws to make the address plaque for house safe and secure.