Quilt batting is the middle layer, or filling of a quilt. It is this material that provides the warmth and fluffiness to the quilt, and there are a couple of different varieties, including low-loft batts (which is flatter) and high-loft quilt batting, which is fluffier. Most cotton batting is of the low-loft variety, but while it may be very thin, cotton quilt batting can be very heavy. A cotton and polyester quilt batting can provide the thickness of a good batt with the lightness of a polyester quilt batting.
Once you have decided what kind of quilt batting you would like in your quilt, it is time to sew it onto your quilted sheet. Prepare by ironing your quilt thoroughly, and ensuring that there are no kinks or creases that could damage the quilt. Once the quilt is ironed, gather together everything that you will need to sew the quilt batting, and leave yourself an hour or more to sew.
Step 1 - Prepare
Take your quilt and lay it face-down on a large flat surface. A dinner table or a handiwork table is ideal, but if these are not available, the floor is a good alternative (remember to cover the floor with paper to prevent dirt and also to avoid pinning your quilt to the carpet).
Step 2 - Fit the Batting
Put your batting down on the quilt, and trim away any quilt batting that is not needed. Put the backing material on top of the quilt batting.
Step 3 - Pin the Material
Pin all of these layers together, beginning with a line of pins down the center of the quilt, and then add more lines parallel to the first; these rows of pins should be around 18 inches apart.
Step 4 - Get Ready for Sewing
Turn the quilt over, and ensure that there are no wrinkles or other damage; if necessary, unpin the affected lines, and start again. When the quilt is free of all wrinkles, place the quilt onto a frame. Sew a few stitches to keep the quilt batting in place, and remove the pins.
Step 5 - Sew the Quilt
Start stitching the layers together using small stitches. Sew along the seam lines between the different pieces of fabric in your quilt. As an alternative, you can sew an "overall" quilt pattern which sews over the design of the quilt, and makes its own pattern. This is a traditional method of quilting, as practiced in Europe for many centuries.
Step 6 - Finish
When you have finished your quilt batting, you can sew the edges of your quilt together with a border (available from craft shops) or with tape, cutting the corners carefully. When the quilt is sewn together, you can remove the original stitches that pinned the quilt batting together to the quilt. Stitches for the finished quilt should be no more than around an 1/8 inch long, in order to ensure the best appearance for your quilt. If you are using important items in your quilt, you may wish to avoid using the overall stitch.