When cutting fabric to cover cording, which is piping, do you need to cut on the bias if you are going to be using it for straight seams?

I would think not unless the bias gives you the look you want.

I didn't cut the fabric on the bias when I made piping. I just used it in the binding seam and it worked just fine.

I've done it both ways. Either way will work. I have noticed that the straight grain piping seems to wrinkle a little more after washing if you cording shrinks though.

Thanks Kathy, that's what i thought but wanted to get advise from the pros.

ok, now you got me thinking about this, I guess i will try both ways, thanks everyone.

A bias cut fabric will stretch a bit and can give you a smoother piping. I try ( notice I did say try) to use only bias as it is a bit better result. Sometimes I just do not have the fabric to do a bias cut for piping.
There is a method that does not use cording for a false piping. You just fold the fabric in half and sew in so only 1/4 inch or so is showing. This method you do not need bias . I often do this as it give a vary similiar effect with out the step of the cord ( I never seem to have the right amount when I need it).

That's a really good suggestion, Lori. I've been thinking about trying that and glad to hear it works for you. Thanks.