Nesting Seams

Nesting seams is a method of pressing seam allowances in opposite directions so they lock together at intersections.
This helps align blocks accurately and reduces bulk where seams meet.

How Nesting Seams Work

Diagram illustrating the concept of physical separation, showing two rectangles with an arrow pointing left on the top left rectangle, an arrow pointing down at the center, and two rectangles on the bottom right side with an arrow pointing right.

  • Seam allowances pressed in opposite directions.

  • Seams lock together at the intersection

When adjoining units are pressed in opposite directions, the seam allowances fit together at the intersection.
This “nesting” helps seams align accurately before stitching and keeps the joined area flatter once sewn.

What Nested Seams Look Like

Close-up of torn fabric with black, pink, and white colors.

Nested seams pressed in opposite directions lock together at the intersection.

Why Nesting Seams Matters

  • Improves alignment at block intersections

  • Reduces bulk where multiple seams meet

  • Helps blocks lie flatter after pressing