Press every seam as follows: First set the seam by pressing it exactly as it came off your machine [from the back], next press seam to one side from the front of the fabric; this will keep you from getting that little fold or lap at the seam line on the front of your piecing. This makes it easier to line up points and adjacent seams. This technique makes your piecing crisp and sharp. 

Borders
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Measure your quilt from the center not the edge. Get the length and width measurements across the center of the quilt. This will help with keeping the quilt square and not having wavy or ruffled borders. To attach the border mark the center of both the border and the quilt edge where you are going to attach the border and mark the ¼ & 3/4 measurement on both also. Now match all five corresponding points [corner to corner, ¼ to ¼ , center to center, ¾ to ¾ , corner to corner]. Now ease in fabric border or quilt edge where needed. This is a long straight seam so slow down don't sew as fast as your machine can run! Some of us seem to get anxious or tired when it is time to add our borders. We tend to just stick them on but they deserve the same attention and detail as the pieced blocks. The borders are the frame of your master piece. They can enhance the quilt or lessen its beauty. 

Outer most edge
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A stay stitch seam at the outer most edge of the quilt is a good stabilizer. Sew a regular length continuous seam ¼ inch from the outer quilt edge all the way around the quilt. This helps to keep your quilt square. This is most important if your quilt has no border and multiple seam ends are at the edge; we don't back tack when we piece so this helps to ensure your seams don't open and the edges don't get stretched. 

Quilt Backing
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Press the entire quilt back after it is sewn together or even if it is one piece, this includes 90 and 120 widths. Press seams either open or to one side; either way is correct. Follow the directions for pressing as stated above. Also it is a good idea to press out the factory folds. This ensures your quilt back to lay flat and gives you opportunity to inspect the backing fabric for manufacturing flaws.
All quilts need to be pressed, threads trimmed, and checked for open seams before being brought in for quilting. The backing needs to be FOUR Inches larger {or more} than the Quilt Top on all sides! This is important for safety and accuracy when the quilt is being quilted. My machine is a Gammill with a Statler computer system attached; it needs room to move about the quilt to quilt free of clamps and pins. My machine can accommodate a king size quilt; it has a 14 foot table and there is 150 inch width of sewing space.
“Every quilt top deserves to be a Quilt”
Specifications for Quilts and Backs:
Preparation Tips
“Every quilt top deserves to be a Quilt”