Just remember there are no rules in quilting it is pretty much anything goes. With that said I found a vintage quilt that my MIL made that had cotton, polyester, and I am not kidding here even old cut up sweaters!!

It was done in the early 70's so you can just imagine some of the Groovy prints that are in it.....

Billy

Of coarse...i have used sheets many times. They wear well and launder easily...go for it!

I bought a king sized flat sheet at a thrift shop a few years back for $2. Going to use it eventually in some manner. That is a lot of floral fabric that was in good condition. Thread count seems good too.
Why not use sheets, they can cost less than backing material.

Cotton is what we buy off the bolt for quiltsssss and piecing. Sheets are cotton ( off a bolt0 that has been hemmed. Why not?????

Even the good parts of worn out sheets were salvaged and used - perhaps as filler or foundations -

I am glad you posted this. I am finally getting around to finishing the quilt for our bed and am doing new curtains for the room as well.

I did find backing fabic that works but AM going to use king size sheets (cut to size) to create the lining for my curtains. If that goes as all as I hope, then I will not be afraid to use sheets on my quilts.

I have even used "gently" used sheets in place of a batting for a light summer quilt.

My Grandmother used sheets all the time for quilting. There were no quilt stores back then. People would give her bags of scraps leftover from making clothes. I have inherited a black and white quilt made with "wet look" fabric and sheets for the batting and backing.

And there are a lot of us out there that don't use all cotton either. I have made several quilts using fleece or minkee for the backing.

I had one relative that used to buy wool army blankets from the Salvation Army and used them for batting.

My MIL only uses sheets for the batting in her quilts.

I look for flannel sheets to use for backing and if not in great shape color wise..use for batting in small projects.
I also use material that I find that I may not really like...large florals or whatever to use for backing.
My quilting teacher has some of the prettiest backs to her quilt using scrap pieces and odd blocks...like getting two in one. I love that Idea. So I always after my first two try to be creative with my backs.