If there's one mistake I see over and over again — the one that causes the most frustration and ruins otherwise beautiful quilts — it's skipping fabric stabilization.

The Problem: Stretchy Fabric

T-shirt fabric is knitted, not woven. That means it has stretch in both directions (we call this "bias stretch"). When you cut a t-shirt into quilt blocks, that stretch is still there — and it's working against you.

Here's what happens:

1. You cut your blocks carefully
2. You sew them together, taking care with your seam allowance
3. But as you sew, the fabric stretches slightly
4. Your blocks come out slightly off-size
5. When you join rows, the seams don't match
6. Your finished quilt has waves, sags, or doesn't lay flat

This is discouraging!

The Solution: Fusible Interfacing

The fix is simple: stabilize your t-shirt fabric before cutting into blocks.

Fusible interfacing is a thin, woven fabric with heat-activated glue on one side. You iron it to the wrong side of your t-shirt, and it bonds to the fabric, adding structure without making it stiff.

Here's my recommended process:

1. Pre-wash your t-shirts — (skip fabric softener) and dry them
2. Cut interfacing — slightly smaller than your finished block size
3. Iron interfacing — to the wrong side of each t-shirt, following package directions
4. Cut your blocks — from the stabilized fabric
5. Sew as directed — you'll notice the fabric handles much more predictably

Next up!... Interfacing. Which one to use. Stay Tuned!