Insert the Carpet Tape
To ensure the carpet tape doesn't work its way back through the opening, cut a length 2 to 3 inches wider than the diameter of the cut-out area. (Carpet tape is available in double-sided and single-sided versions; the single-sided type generally works best for this type of repair.) Peel the backing away from the adhesive side of the tape and carefully insert the piece into the cut-out area, smoothing it flat from below so that it sticks firmly to the carpet backing around the perimeter of the opening. Be patient and work carefully: handling the stickiness of the tape can be a challenge. For a cut-out this size, it generally works best to cover about half the space with one piece of tape (image 1) and use a second piece to cover the other half (image 2).