Hi Valentina! Yes, there’s only one seam down the middle on this particular backing. Partly, that’s to keep the tutorial simple, but also because I rarely do anything else these days. If you’re making a very large quilt that will be folded a lot, some folks say not to put a seam down the middle because it’s a stress point when the quilt is folded. On larger quilts that I’ve made (bed size +) I have used three lengths of fabric instead of just two, and used one entire fabric width down the middle, with narrower widths down each side so that there’s not a seam in the middle of the backing.
On a quilt that’s pretty small, but wider than typical fabric yardage (36″+) I usually just put a seam down the middle.
This is about the only time I tear fabric, and I’d never do it to actually piece a block or sashing or something. My crazy accuracy freak girl twin would have a fit!
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