I've got an old log shed that has a concrete floor. I plan to put a woodstove in, but I need ideas for something insulative to put between that cold hard concrete and some rugs or a carpet. It has to be cheap or free and readily available...this is just a temporary shelter while I get the place going. I've considered newspapers but the fire hazard just scares me too much, and besides they're not real soft. I've thought about trying to collect unwanted foam rubber mousepads, since they seem to be plentiful and are becoming obsolete. Easy to clean. I'd only need 150 or so, duct taped together. I've considered styrofoam packing peanuts, but they'd be awfully lumpy and noisy. Got any IDs?