repairing denim quilt - - question
Hi guys! My brother in law has a quilt that his grandmother made for him in 2000. This is pieced with squares of old blue jeans. Just square 5 x 5 or so. The backing was flannel. Last year the backing started to wear out and now my sister said the backing has really bad holes in it. I am going to put a new backing on for her. They want to use flannel again for the backing to match as much as possible what grandma used. Which is fine. My question is, does the denim wear hard on the flannel? could that be what caused this to wear out so quick? (I know 15 years is a long time, but many quilts last much longer) There is no batting so its just the flannel against the denim. What do you guys think? (I am just wondering if when I replace this if the same thing will happen) If so, is there a way to slow down the wearing on the flannel?