Sweater neckline question

[ABC's Mom]

Hi everyone,
I will be starting my husbands crewneck sweater soon and have a neckband question.
I was looking at some of his boughten sweaters and decided I really liked the look of the double band on most of them. It just seems more finished then the single bands on most patterns.
Is there a trick to making the band double or can I just lenthen the neckband and fold it over and stitch it down? Will that work with 100% wool yarn knitted in a mid weight worsted? I think the pattern calls for size 8 nee