How should you know when it is the right time for you to add protection? First, you should keep in mind that you can never be too safe. In addition, it is customary in our industry to add protection to your carpet or upholstery every other year. Depending on the amount of usage in your home, normally it takes about 2 years for the carpet protection to deteriorate. Therefore, add protection based on your understanding of how necessary it is in your home.