Cold weather puts a strain on anyone’s survival skills. The greatest problem you face is maintaining your body heat, which the cold will do everything it can to steal. Although being in a shelter can help protect you from the cold, it doesn’t always help as much as you’d like.
One of the biggest problems with most survival shelters is that they leak air. We have this problem with our homes as well, but a home heating system usually has enough overcapacity to make up for it. Nevertheless, those air leaks cost us money, in the sense that they make us burn more energy than we would otherwise.
If you have an energy audit done on your home, they will check for air leaks as well as places which aren’t properly insulated. Many people lose a lot of heat through their attic, because the insulation compresses over time, leaving them without enough insulation to meet their home’s needs. They also find that seals around doors and windows wear, allowing air leaks that steal precious heat.
Similarly, if you are in a winter survival situation, you need to run a home energy audit of your survival shelter. Your shelter probably won’t have much insulation and it will also have air leaks. Identify those so that you can do something about them.