Here is a quick and easy way to do a double weave viking knit. Start your weave in a single knit and make at least four rows. I always use copper, so I do not waste any silver. Add your silver by twisting it onto the copper end. (take a look at my blog on how to hide the ends after adding wire)
The ends will be hidden under the weave as you continue to add more rows. For a double knit just backtrack two rows onto a single weave and add your wire under the X. Continue weaving around the dowel always two rows from the bottom of the knit. This makes a nice dense chain.