Release the carpet from the wall in the corner nearest the rip using a knee-kicker tool. This tool has hooks that attach to the carpet, and various settings to help it grab the carpet and lift it from the wall and tack strip using pressure from your knee. Follow the setting guidelines in the knee kicker's manual since each tool is different.
Lift the corner of the carpet from the tack strip; then roll the carpet back from the wall.
Sew the rip from underneath the carpet. Use heavy thread and create 1-inch stitches every quarter inch of the rip.
Flip the carpet over every three to four stitches to make sure you are not sewing down any threads of pile on the carpet.
Apply latex seam adhesive to the back of the seam once the stitching is complete. Apply the adhesive in a wavy line along the repaired seam. The adhesive helps bond the newly stitched carpet even more.
Roll the carpet back out, hooking it back onto its tack strip.