How to Adjust Seam Allowances Accurately: The "Scant Seam Allowance" Technique Explained

How to Adjust Seam Allowances Accurately: The "Scant Seam Allowance" Technique Explained

Published on: January 25, 2021
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The technique commonly known as scant seam allowance will forever change piecing, precision and final result of your quilting projects.    
A quilt is way more impressive when the seams of each piece land exactly where they should.When you spend countless numbers of hours on a projectyou certainly want the final result to reflect that. 


What’s the Use ofScant Seam Allowance? 
The universal seam allowancestandard for quiltis ¼ inHoweverwhen sewing manypieces together to make a quilt andpressingthe seam allowance to one sidethe thickness created by the iron can slightly reduce the width of each pieceEven if the variation is as negligible as one millimetrethe total variation of all pieces sewn together can be ¼ in, ½ in, 1 in, and even more.It’s a significant difference for a projectthat builds on precision. 


Instead of cheating by pulling with the iron or manually on seam allowancesthe scant seam allowance technique,which is basically adjusting seam allowances,will make all the differenceand save you a lot of headaches. 

The Scant Seam Allowance Technique on Video 
Caroline explains howto perform the scant seam allowance test.  Link to the video


Performing theScant Seam Allowance Test 
Thescant seam allowancetechnique consists of performing a seam allowancetest before sewing your quiltYou will need5 or 6different blocksof fabric from your projecand a quilting ruler. 

STEP 1 : Sew the5 or 6pieces with a ¼ in seam allowance to create a strip.

STEP 2 : Iron the strip, placing all seam allowances on the same side. 


STEP 3 : Measure the lengthof yourstrip and check if you are falling short or if you have extra fabric in comparison with the expected length.




STEP 4a : If it’s shorter, your seam allowance is slightly too big,solightly move the needleof your sewing machine to the rightto reduce seam allowance.

STEP 4b : In some rare casesthere could be extra fabric caused by seam allowance slightly too smallIf it’s your case,lightly move the needleof your sewing machine to the left to increase the seam allowance. 

STEP 5 : Do stepsto 3 again with the new needleposition until you get the exactwidth needed.

STEP 6 : You can now begin creating your quilt with peace of mind!


Tip
To avoid having to re-test every time you work on a similar quilt projectmake yourself a cardboard template with a stitch at the exact position of your adjusted seam allowance. 

A Few important
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