Correction:  The HGTV web site mentions fusible webbing in the show's description. I only use fusible INTERFACING as the foundation for my watercolor piecing!

Tip:  Using fusible interfacing with a grid: Use fusible interfacing to foundation piece all those little squares on the interfacing grid. Once you are happy with the layout of your quilt squares, just iron them to the interfacing.  You now take your interfacing panel and fold and stitch all of the seams, in one direction. Clip along those rows, with a 1/4" snip, to prepare for the final seams. Fold and stitch the remaining seams. The clips will allow you to finger-press the seam allowances in opposite directions on the final seams.  (Note:  all of my books and patterns include detailed instructions on this technique.) Be prepared for compliments on how well all your seams line up perfectly!

Fusible interfacing products to look for:

Pellon's Quilter's Grid, product # 820, has 1-inch grid with a 44" width.  You can order here from Dina. $3.49 per yd

HTC-Handler's Quilt Fuse comes in a 2-inch grid and a 1 1/2-inch grid with a 48" width.  You can order here from Dina.  $3.99 per yd

Tip: Double check that the fusible interfacing is BUMPY side up.  I can't stress this enough. Imagine laying out all the squares, going to iron it, and having it fuse to the ironing board.  Groan!  Bumpy side up.

Tip: Help! I can't see the grid!  Slide the plastic manufacturer's direction sheet, upside down, under your interfacing.  It slides easily under the area you are working on.

Tip: Getting a jump start on quilt jackets with interfacing.  Piece blocks then take advantage of the wide interfacing to join them quickly to create your jacket fabric.

Tip: Square your panel before adding borders.  Line up your finished, pressed panel on a large cutting mat.  Align a center seam both vertically and horizontally.  Trim outside edges evenly and square.