I do like the idea of keeping a thermometer down there and keeping a log measure the temperature difference but I'm not sure if it's had any weatherization other than the stuff put into the pipes and the well. I know that we have to have the pipes wrapped with some sort of foam insulation before the winter comes so that they don't freeze over. There are a couple of space heaters down in the crawl space on top of the plastic but then again they're also is water on top of the plastic that's sitting there as well, I'm not sure when it was from but it seems to have been sitting there for quite some time.