This version of the weaver’s knot is used when smooth yarns won’t hold with a regular weaver’s knot. Remember though, even this knot won’t hold very slippery yarns.

The double weaver’s knot is a regular weaver’s knot with an additional step. One way to make it is to begin like #1, the “ears” method. As soon as you have the thread between the ears, take it once around the right-hand ear as well. Then do the same last steps: take the right-hand ear down under the thumb and tighten by pulling on the right standing end.

The double can also be undone like the regular weaver’s knots.

Double Weaver's Knot

Taken from Book #2: Warping Your Loom & Tying On New Warps