I agree with all the above, though I have yet to deal with an assymetric pattern.

Basically, any loom is going to have a selvedge of some kind on each edge. The kilt maker does need selvedge at the bottom of the kilt so it doesn't fray, but doesn't need selvedge at the top of the kilt.

If they did need selvedge at both edges, every kilt would have to be woven at your total kilt length. 23.5" for me, 25.0" for you, 24.5" for that other guy...what a nightmare.

The one piece of House of Edgar yardage I bought came labeled with a "face" side, the one piece of Strome yardage I have bought did not.

I think if you have both an assymetrical tartan and a face side you are between a rock and a hard place with doublewide. If you split a piece of that double wide down the middle and turn one piece 180° to join the other you could have the same pleat reveal all the way around, but the pleat depth L-> R will be mirror images. If it is going to be I think Kingussie pleated that could be stunning, but with standard knife pleating it might be jarring.

I am really glad all of my clan patterns are symetrical I think. That hurt to think about.