When making these slipcovers, you’ll be working on them inside out with seams facing you.
How to Sew Cushion Slipcovers:
Take a cushion off the sofa and measure the length, height and depth. Make sure you add a generous seam allowance to those measurements. If using drop cloth fabric, add about 3cm or more for each seam as it has a loose weave that will give over time.
Draw this out onto your fabric and before cutting, lay the cushion on top to double check you’ve measured it all correctly. The cushion should easily sit inside the shape you’ve drawn. Cut 2 of these (for front & back of the cushion).
Do the same for the sides of the cushion, but at the bottom edge you’ll need to allow for a zip. Use the cushion as a guide to how the manufacturers did things.
Would you believe that before this project, I never learnt the proper way to sew a zip with exposed teeth before?! It’s so easy and actually fun.
Sewing a Zip Panel:
Take the width measurement for your side panel and divide it by 2 (the zip will go in the middle). Add on 6cm to each panel because you have 2 seam allowances here.
Sew the 2 panels together so they make 1 panel the same width as the other side panels you have made.
Pin (or “no more pin”) your zip into place along the seam. Make sure you match the zip teeth up with the centre of the seam.
Stitch the zip into place using a zipper foot to get nice and close.
Unpick the centre seam to reveal your new zip!
Assemble the Pieces:
Sew the ends of the zip panel to the end of the remaining side panels to create a hollow square.
Lay your cushion piece on top of the cushion. Wrap your side pieces around it and pin the 2 pieces together, ensuring a nice fit over the cushion as you go.
When sewing it all together, the corners can be somewhat fiddly, so snip it in about 3 places to help you work around the bend.
Repeat the process for the other side of the cushion and you’re done!
Now do the same thing for all the cushions on the couch.