I have carpet on my sewing room floor. While its warm I dislike it for a lot of reasons. The biggest is my chair won't roll on it. My husbands says to just get up when you need to iron or cut! So much easier to roll over there! I have two office desk plastic type mats down now. One is very thick and hard. The other is poky on one side and much thinner. I'm always rolling off the thick one and its just not working. Does anyone have an answer to what to lay down over carpet to solve this problem?