I didn't think of insulbrite at the time I did mine. I put down a layer of tin foil then a few layers of batting..Thin batting..I say that because I have a small board that has thick puffy underneath and I don't like it ~ then an old sheet. I just took it off the other day to wash all the starch build up off. Amazing how that happens. But it means I've been busy. =) And THAT makes me happy. =)