Scant 1/4" seam allowance

[Grandmere]

Do you only use the Scant 1/4" seam allowance when making Half-Square Triangles, or continue throughout the entire quilt, rather than just using 1/4 inch seam allowance? I'm about to start on a BOM, and instructions for the very first block indicate making Half-sq. triangles using a Scant 1/4th inch seam. Further instructions to make Flying Geese units (for the same block), do not indicate continuing the Scant 1/4 inch seam allowance, or the regular 1/4 inch seam allowance. Should I follow directions and only use the Scant 1/4" seam allowance when instructed to do so? Is it all or nothing?

[kfstitcher]

You need to be consistent with your seam allowance. If you start with a scant 1/4 continue with it.

[Grandmere]

Thank you for your response. I just don't know why written instructions don't clarify this.

[kfstitcher]

Yes that is a little confusing.

[Margo]

It doesn't matter what your seam allowance is! What is most important is the size of the blocks (and units) as you stitch them!
If you are making HSTs that finish at 2", after your diagonal seam is stitched it should measure 2-1/2" x 2-1/2".

If your directions call for scant 1/4" they are probably allowing for the slight amount of fabric taken up as you press your seam allowance to one side. Is it possible to contact the person who wrote the directions to ask?

If you want to check to see how accurate your seam allowance is you might want to try my seam allowance test. Check it out here:
http://good-times.webshots.com/album/569415726bHNKHF

[Grandmere]

Thank you Margo for your well written explanation as well as the seam allowance test. You've helped me tremendously!!

[Margo]

Glad to help Ramona! Have fun with your project!

[Margo]

Excellent test Margo, thanks!

BarbCA