Carpet will sometimes get ripples or waves in it because it is becoming lose. This happens sometimes because carpet was not installed correctly. To fix a problem like this you need to have your carpet re-stretched. This is where a technician will go into your home and use a power stretcher and a knee kicker to pull your carpet and stretch it in both length and width. After that is done he will then cut off the extra carpet which can range from 2-4 inches of excess carpet. Please feel free to contact us if you have any questions. And if you want more information on what a power stretcher is click here.