Originally Posted by neeng
It's fine not to wash your fabric first as long as you're using all the same kind of fabric e.g. all 100% cotton, no problem. If you're mixing fabrics (cotton top, flannel back) you'd want to wash the flannel. Or if crazy quilting using different fabrics then I would wash them first if possible. (Quite a change of view for me since I came into this board thinking always wash... because I did dressmaking, where the size of the finished object is critical and the fabrics are usually mixed fibres that shrink at different rates).
I came into quilting after 3 years of garment sewing for my kids and so I always wash first, too. I don't mind the pucker in the quilt that happens when you don't wash, it's just habit, especially since sometimes my girls raid my stash to make some skirts for themselves.