Correct Knot to Join Two Ropes Together

Here you see the Better Way to join two fixed ropes together, ropes on which you will either be jugging or rapping. Use this knot only when you cannot rebelay your rope and change ropes at a belay station.

In case you can't see what I've done, you join your two ropes together with a regular figure of 8 knot. [Not tied exactly perfectly with nice meshing loops, but you get the idea]

Back off the ends with half a double fisherman's knot as shown.

Then, take the whole kit n' kaboodle, and tie it into the middle of an Alpine Butterfly Knot.

The Butterfly Knot is incredibly easy to untie, and you will no longer have to fight your figure of 8 when you untie.

Do NOT use this knot for joing two ropes for a double-rope rappel.

You should use a Euro Death Knot for that.