When I load backing on the quilt frame I use the grain of the fabric, not the cut edge. Here is an example of why it's important to check your wide backing.
This backing was wonky when it was wound on to the bolt. I'm sure the person cutting it did cut it straight as it came off the bolt. But as you can see, the fabric is cut way off the grain.
Be sure to check the backing and straighten the grain if it is off. If you don't want to straighten the grain, there is a simple solution, buy an additional 4 or 5 inches more after you've already added the 8" the longarmer needs.
Fortunately, this client sent a backing that had plenty of extra fabric so I didn't have to send it back.
