Ya, I'm From Maass and its been pretty cold here low teens and single temps, we've been out banging out jobs left and right, We have valve stems mounted on our pumps and just use a small compressor and blow the machine out at the end of the job. I had one night last week my chemical sprayer tip froze within 30 seconds of being outside. So far tho we've had some pretty good luck. my pant legs were wet when i came off the roof froze before i could get to the bottom of the ladder. Ya i wish we didnt have to work in the cold, tacks on about 25 minutes anyways to the jobs. The pitched roofs are the real fun ones though.