I never thought not to wash my quilt then quilt it.
 

My quilting friend was over today and I was quilting in the ditch on the long seams across and down on a quilt. I trimmed the batting and backing and stay stitched around the quilt. I then put in the washer. My friend was like What? I said I want to get the basting spray out of the quilt before doing the main quilting on it. She said you can't do that. My reasoning is I want the quilt layers loose. I machine quilt and press with starch to get the quilt very stiff before quilting it and the spray will cause wrinkles when pressed. Works for me. She said I have never heard of anyone washing a quilt then quilting it. LOL

The way you described your prep sounds like it's stable to me. Your friend learned something new today lol

New to me, but if it works for you that's what counts!

I would not even try this. one reason I don't do all the prep work you do. Never use starch.

Do what works for you.

I ended up doing this on my most recent whole cloth because I totally messed up ... it was a lot more work than I wanted it to be.

Kudos to you for doing it that way!!!

I finished it this morning. It is a about a 60 x 70 quilt. I didn't have to worry about puckers or wrinkles because the SITD held the quilt in place. I quilted one block at a time with an easy freehand design. Now the binding which will take much longer. I get bored with binding and usually do a few inches at a time.

i do that sometimes if i am not sure the quilt is going to look great after it's washed.
i don't want to waste the effort of binding something that won't look good enough to give to anybody.
if it turns out yucky i use it outside or in the car when i'm transporting dogs.

I would think it depends on the batting. if it requires tight stitching, i would definitely not wash it before quilting. ever.

I have done this with every type of batting there is just about. No problem so far. Why say never? LOL

That's how we learn new things. You go, girl!