How to Install an Invisible Zipper

 

1. Buy a couple of inches longer zipper than you need for the opening.  

2. Mark on both pieces of fabric where the 5/8” seamline will go along the top (neckline). 

Also, mark on both sides where the zipper will end.  This is usually a dot on the pattern.
Mark neckline

3. Unzip the zipper and press the zipper coils flat from the back side of the zipper. Press zipper flat

4.

Take the right hand (as you are looking at it – not as you are wearing it) piece of your garment right-side up and lay the zipper right-side down on the seamline. 

The top stop of the zipper should be  just below the 5/8” seamline of the top. 

You just want the edge of your fabric to ride along the 5/8" marking on the machine bed.  You will be using the markings on the left side of the presser foot.  This will feel weird, but is necessary since you want to always sew top down. 

The zipper teeth will ride in the right-hand track of the zipper foot.   You don't need to pay any attention to where the zipper is.  Just make sure the edge of the fabric goes along the 5/8" marking of the machine.  (The edge of the zipper should be about 1/8” from the edge of the fabric.)

Drop the needle down and check to make sure three things are in place

  • the top zipper stop just below the 5/8” seamline along the top
  • have the fabric edge on the 5/8” line
  • zipper teeth in the groove
Sew with a normal stitch length until you reach the mark where you wish to end the zipper (the dot) - backstitch at the beginning and ending.

Now the right size is completely done

5. Next take the left side of the garment right-side up.

Place the zipper on top right-side down.  Try to line the zipper stop up perfectly just below the seamline mark at the top like before.  Line up your garment edge on the 5/8" mark on the machine bed (the normal right-side of the presser foot).  Put your zipper teeth in the groove.

LENGTHEN YOUR STITCH LENGTH TO A BASTING STITCH.  DO NOT BACKSTITCH.  SEW ONLY ABOUT 2”

Stop.  Clip threads and zip up the zipper to see if you have the neck edges lined up perfectly. 

If not, then just rip out the basting and try again.  Repeat until perfect.



6. Next you have to find the perfect spot on the zipper for the waistline seam.

While the zipped is zipped all the way up, mark with a disappearing pen the spot on the zipper where the waistline seam hits.

7. Next you want to line up your mark you just made on your zipper with the waistline seam on the left-hand side of the garment.

LENGTHEN YOUR STITCH LENGTH TO A BASTING STITCH.  DO NOT BACKSTITCH.  SEW ONLY ABOUT 2”

Stop.  Clip threads and zip up the zipper to see if you have the waistline seams lined up perfectly. 

If not, then just rip out the basting and try again.  Repeat until perfect.

8. Next you want to make sure the zipped ends at the right spot.

Find the spot on the zipper where your stitching ends (on the side that is already stitched), and mark this spot on the zipper.

Line up your mark at the bottom of the zipper with your stopping point marked on the fabric.

LENGTHEN YOUR STITCH LENGTH TO A BASTING STITCH.  DO NOT BACKSTITCH.  SEW ONLY ABOUT 2”

Stop.  Clip threads and zip up the zipper to see if you have the stopping points lined up perfectly. 

If not, then just rip out the basting and try again.  Repeat until perfect.

9. Once the zipper is perfectly basted at the top, at the waistline and at the bottom, now you want to sew it in.

Change your stitch length back to normal.  Put the zipper teeth in the track.  Needle down.  Backstitch and then sew making sure the edge of the fabric rides along the 5/8" marking on the bed of the machine.  Stretch the fabric a little as necessary to make sure the fabric is the same length as the zipper.  Sew to the marked stopping point and backstitch.
 
10. Now you should have the zipper installed perfectly.

10. Next you have to close up the seam at the bottom of the zipper.

11. Now just put on an old fashioned zipper foot.  Close the zipper, fold the fabric right sides together and sew the rest of the seam.  The zipper foot will let you get close to the bottom of the zipper.

12. Now you have a perfectly installed invisible zipper.