Step 1
Measure the area where the carpet transitions to the tile and make necessary cuts to fit the strip. Transition strips are either wood or metal and come in a variety of finishes. If the transition is wood, use a circular saw to cut it to size. If the transition is metal, use metal nippers to cut it down.
Step 2
Use a carpet knife or a utility knife and trim the frayed carpet back. Do not over trim; just do the edges.
Step 3
Take 1/4 to a 1/2 inch of the carpet and fold it under itself. Hold it into place for the next step.
Step 4
Lay the transition strip over the folded edge of the carpet. The strip should extend onto the tile, but should be screwed in over the carpet and subflooring. Use a drill and insert the necessary amount of screws. Transitions are usually pre-drilled and will require between three and eight screws depending on the length of the transition.