Last winter we had more than one -15° night. When it got that cold I covered my pits and put cones up. Tonight its supposed to get to -5° with wind chill temps to -20° to -25°. I have floor heat (no doors) but am concerned about the water in my pits freezing. I didn't have any freezing issues last winter when I covered the pits, but @ -5°, I'm wondering if that's overkill.