The telltale signs that piecing may be needed include finding batting or backing fabric poking out from the quilt top in spots. Gaps or holes between fabric layers are another red flag. You can also try the pinch test – gently pinch an area and feel for sponginess, which indicates separation. It’s best to catch the problem early before it spreads. At the same time, some looseness is normal for vintage quilts and may not require immediate attention.