I just saw one. They had built a 2x2 frame to hold the insulation foam boards and the quilter simply wrapped flannel fabric around it and stapled it to the back of the wood. She said the flannel held the pieces well without pins. There was a little bit of space between the flannel and the foam insulation, but that did not seem to affect anything. She could still pin into the insulation when necessary. She had a lap size batted quilt pinned to it when I saw it last week.
I used to have a design board covered with Warm and Natural batting, but actually think flannel would be better (at least if you have cats who like to brush up against the bottom of the design board.....). I did have difficulty with large blocks sticking to the batting.
Last edited by Prism99; 07-25-2012 at 10:22 AM.