Berber carpet has pile made of loops instead of loose ends. The exposed part of the carpet (the pile) is made of strands that come out of a woven base of square holes and then loop back into the next hole. The threads are anchored into or below the woven base with adhesive. A run causes a thread to pull out anywhere from a single loop to several feet or even yards in length. Tuck the loops back in place, and glue them for a nearly perfect finish.
Glue and Tuck
Examine the pulled strand. The run will have a definite base where the looped pile is intact. Find this base at one end of the pulled strand. Look closely at the strand to identify if there are periodic glue marks along the strand. They should be in between each pulled loop of the pile.
Tuck the first loop. Place your screwdriver or other blunt object on top of the first pulled loop at the glue mark, and push this into the first available hole in the woven backing. If it sticks, try pushing the next glue mark on the strand into the next available hole in the woven backing. Continue for five or six more glue marks and holes.
Examine your work. If the loops you replaced into the backing look uneven, pull them out and try spacing them more evenly so the pile you replaced matches the surrounding pile. When you are satisfied, pull the strand out, remembering what holes in the woven backing match what glue marks on the pulled strand.
Glue the looped pile back in. Place a small dot of glue on each hole in the woven backing that matched the glue marks on the strand. Replace the glue marks in the holes, and let the glue dry. If the loops do not stay in after being placed back in the holes, apply a weight to the area to keep the loops in while the glue dries.
Continue with the next five or ten glue marks/holes. If the job is going smoothly and the loops are not pulling out, continue without bothering to let the glue dry until you finish the job. Keep off the area until the glue is dry.
Adjust for too much or too little exposed strand. If you come to the end of tucking and gluing the exposed strand and you have too much strand left over, cut the excess, melt the end of the tucked strand with a match and glue and tuck it into the last hole. If you have too little strand left over, get a strand from a hidden border to finish tucking and gluing the run.