Floating house numbers are a good alternative to using address plaques. Basically, they are pieces of metal of plastic that come in the shape of numbers. So instead of fixing the address plaque on the wall and writing the number on it, you can just fix the floating number on your wall. There are floating numbers that can be fixed using glue or screws. There are no special benefits for using floating numbers instead of address plaques apart from the unique aesthetic. In fact, installing floating numbers can be harder than installing address plaques.