I have made three different styles of string quilts, made on fabric foundations of old worn bed sheets or cottons not of quality to be on the top. All foundation fabrics were per washed, my scraps are generally per washed-but the scraps gifted to me --maybe not. 2 of the 3 are king sized and heavy/warm. The third is a queen with poly batting - hubby likes the lighter one, and it is plenty warm. I am in the process of my first CRUMB quilt....... Lovin it- another keeper. I am really into the unplanned and color splashes, not ready for a planned pattern. My advise? PLAY!