Finishing a Block with Fusible Interfacing

Jo Newsham © 2008

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In my quest to find ways to finish off my work without having to sew a straight and tidy line, I turn once again to my fusible interfacing. I did this idea originally with my “Cross” project (pictures below).

Here are step by step instructions. This gorgeous block was the result of a “tone on tone” Round Robin.


  • Your embellished block
  • The original block template (especially if it is an unusual shape)
  • Heavy weight iron-on interfacing – single sided fusible
  • Lighter weight iron-on interfacing (not necessary, you can use the heavier weight again if it is all you have)
  • An iron!!

Step 1 :  Use your template and cut out your first piece of heavy grade, iron-on interfacing . You don’t need seam allowance, it should be the size you want your finished block to be. The thicker (heavier) the interfacing, the better. Iron the interfacing on to the back of your block (fusible side down!), lining up where you want you edges to be. (that may not be your original basting line).  You now have a nice firm base to work around.

Step 2: Turn your corners in and press (as per picture below). Make sure the turn is right up to your interfacing.

Step 3: Next fold your edges in. Again, keep them right up on the edge of the interfacing. The thicker interfacing gives you a nice clear line to fold along.

Below, you can see how you get perfect mitered corners. Give each side and corner a good press.

Step 4: Take your second piece of iron-on interfacing (same size as your template), and trim it a little smaller than your block size. You want it to still cover all the raw edges, but not be bigger than the finished block.

Step 5: Place your interfacing on the back of your block (fusible side down again ) Do a last check that the edges are inside the finished edge of the block, but are still covering all raw edges. You can see that I leave a lot of seam allowance on my blocks.

Press interfacing in place, and voila a finished block, and you haven’t been anywhere near a sewing machine!

Here is the finished block. It is hanging from just one clip to demonstrate that the block has a sturdy finish…no floppy corners!!

Below is my “Cross” project, a gift for a friend. This technique worked particularly well for this project. Firstly, I knew I would end up with a good , consistent shape for the Cross. Secondly, I didn’t have to worry about any stitching interfering with the embellishment on the front. This piece was then mounted on a canvas frame for finishing.

Jo Newsham

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