25/09/2026
Do you really need to prewash every fabric?
I think most of us were taught at some point that prewashing is simply part of sewing. Fabric comes home, fabric goes straight into the washing machine. 😂
But over the years, I’ve changed the way I look at it.
For me, it’s less about following a sewing rule and more about thinking about what the finished garment is going to be exposed to once it leaves my sewing room.
If I’m making a cotton dress that’s going to be washed regularly, you can bet I’m prewashing it. I don’t want to spend hours getting the fit right, only for the first wash to change the size or shape.
And let’s be honest, that first wash is a much nicer surprise when you know exactly what your fabric is going to do.
But not every fabric needs to be treated the same way.
I look at the fibre content, the fabric itself and how I expect the finished garment to be cared for. Cotton, linen, rayon, bamboo blends and wool can all behave differently once water and heat get involved.
If I’m unsure, I’ll test a small piece first.
Measure it before washing, wash it, then measure it again. Has it shrunk? Twisted? Changed texture? Released colour?
That little bit of information can be very useful before you cut into three metres of fabric.
There are also fabrics where you need to think twice before throwing them in the washing machine. Water repellent fabrics, waxed canvas, coated fabrics and some bonded fabrics can have finishes that you don’t want to remove, so always check the care recommendations first.
And don’t forget about colour.
Dark denim and strong colours can release excess dye during their first few washes. A quick test with a damp white cloth can save you from discovering that your beautiful cream fabric and indigo fabric were never meant to become friends. 😂
The same applies to everything else going into your garment.
If you’re prewashing the outer fabric, think about your lining, interfacing, trims and anything else that will become part of the finished piece. You don’t want one component shrinking while everything around it stays exactly the same.
So, do you need to prewash?
Sometimes yes.
Sometimes no.
And sometimes a little test is all you need to work it out.
For me, it comes down to one simple question:
How is this fabric going to behave once it becomes something I actually wear and wash?
And full disclosure, probably 95% of the things I sew get prewashed anyway. 😂
I just don’t think we need to treat it as a blanket rule for every single fabric that comes through the sewing room.
A few minutes of preparation before you cut can save a whole lot of frustration later.
Because there’s nothing quite like pulling your beautiful handmade garment out of the wash and thinking, "Well, that wasn't what I had planned." 😂
So tell me, are you a prewash everything sewist, or do you decide based on the fabric and the project?