Seeing as I am starting my day with the temperature at -41 with the wind, I thought it might be nice to see if there is anyone else that opens and washes cars in extreme cold. If you do, what precautions do you take? If not, what temperature is “too cold” to open?
If -41 with the wind is a "Wind Chill" factor it's basicaly meaningless for non living tissue. Although wind will tend to defeat heat in certain areas. Things are also different for tunnels, SS and IBA . You didn't say which you are.
Although wind chill is meaningless for non living tissue, it does significantly change customer perception and acts as a deterrent on whether they should wash that day or not. On the day I first posted, it was -29 deg C (-20 deg F). We are a FS tunnel w/ enclosed heated vac and drying areas. (about 18,000 sq. ft. total)