Help with piecing backing
My backing needs to be 74 in. X 91 in., this includes the extra 3 in. on all 4 sides.
I have 7 yds. X 41.5(minus selvedges) WOF to use.
I would like to preserve as much as much of the backing as possible for the quilt coming up next.
If I cut 2 pieces at 2 yds plus 19 inches(=91)
I'll sew a 1/2in. vertical seam this will make the backing width 82in. (41.5 x 2-1=83)
My questions: when do I trim the excess 9 inches?
After I have joined the 2 pieces? Or Before?
Trim 4.5 inches from each side so seam is in the middle?
Trim 1 -9in piece from one side making for a seam that is off center.
The backing is beautiful fabric, soft yellow, tone on tone. I really don't want to mess this up!!
Any other possibilities to piece?
TIA, Jo Anne