no one layer at a time, for this one I laid out the top, center line marked in chalk, marked the batting both sides rolled it onto the insulation careful to keep the marked lines aligned. Rolled it over the top matching the center. Then rolled the back on which was marked in the center also, rolled it out applying the glue in wavey lines every 6 - 8 inches. So two great things happened. It was bar none the easiest piece I have ever had to square before binding, and 2 my Juki preferred the glue to basting spray, no gummy needle.