Bosal Grid Quilt Square
In this video, Bob demonstrates how to make a quilt block using Bosal fusible interfacing with grid lines, which makes creating perfect squares fast and simple. He explains how the interfacing keeps the fabric neat, eliminates frayed edges, and helps align 2½-inch squares precisely. Bob shows how to fuse the squares, sew along the grid lines, clip intersections for flexibility, and press the seams for a flawless finish. He also tests the method with half-square triangles and flying geese, proving that the interfacing works well for more complex designs too. The result is a clean, accurate quilt block that saves time and effort while still producing professional results.
I cheated a little while making this quilt block, and I don’t feel bad about it. Look how perfect these squares are! All the intersections line up beautifully, and the back has no loose threads or frayed edges. That’s because it’s backed with Bosal fusible interfacing that has grid lines built right in.
The interfacing comes in a full bolt, but you can cut smaller pieces to match your project. It has light blue grid lines spaced 2½ inches apart, which makes it perfect for cutting and aligning 2½-inch fabric squares. One side is smooth, and the other has a slightly bumpy texture—the bumpy side is the fusible side that you’ll iron onto your fabric.
For this block, I made a five-by-five grid. Once the squares are ironed on, there’s been no sewing yet, which is why it feels like “cheating.” Normally, piecing and matching points takes time and precision, but this method is simple and fun. I wouldn’t necessarily recommend it for absolute beginners—you should still learn traditional piecing—but it’s a great alternative once you have some experience.
After fusing the squares, it’s time to sew. Fold the piece along the first grid line and stitch a quarter-inch seam. Repeat for each line across the block. When you finish sewing in one direction, you’ll notice the piece looks a little tall and narrow since the seams pull it in slightly. Press your seams all to one side, then use small snips to clip each intersection along the blue grid lines. Be careful not to cut through your stitches. This step lets the seams move freely when you fold and sew the opposite direction.
When you sew the other way, alternate the direction of your seams to create nicely nested intersections. Once you press everything open, you’ll see perfect squares and a clean, fray-free back. The result is smooth, neat, and beautiful.
I also experimented with half-square triangles and flying geese using this same interfacing, and it worked just as well. The interfacing is transparent enough to see your seam lines, which helps keep points sharp and aligned.
This Bosal fusible grid interfacing is a game changer for quilters who want precise results with less effort. I hope you’ll like and subscribe to our YouTube channel—and as always, happy sewing.
