We full time semi-permanent in central west Texas, going on year 4. We occasionally have below freezing temps, snow and ice, and sometimes for a few days in the winter.
When fall starts we switch our hose to our heated hose, and protect our faucet and regulator with a small round styrofoam cooler placed over it (our spigot rise is not very tall.) and I wrap the faucet and regulator loosely in insulation, so we can still get to it easily. I've been known to throw a "hot hands" hand-warming packet under the cooler when we had temps in the teens, just to make sure the faucet stayed above freezing.
We have a 100 watt lightbulb with reflector shade attached to the ceiling behind the basement wall, where a majority of the plumbing is, and we turn it on during the nights when temps are going below freezing. We leave the light on in the UDC, which creates a little heat in that confined space so our Camco water filter doesn't freeze.
We leave our bath grey tank open most of the time, so when it's going to be freezing we shut it, so we won't have ice build up in the sewer line.
We have a wireless remote thermometer, and we placed a sensor deep in the underbelly near the fresh tank, to monitor temps. We make sure our furnace runs enough to keep the belly above freezing.
We have a small tabletop Vornado heater in bedroom, which keeps us warm enough to not run furnace if temps are cold, but not freezing.
We've not skirted before. But I can see this would be helpful. If our temps were colder, I'd do it.
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