They don't leave messages because there are very long lists to call from home improvement shows every day. They can't leave a message for each and every person because it would be too time consuming. If you want something done or are not interested, all you have to do is call back and let them know that and the calls stop.
Weather Tight does not cold call, so they get your information from sweepstakes entry forms that you fill out (it says right on the form that they will call you)or from customers that refer their friends or family members. I hope this clears things up a little.