If you or your tenants are leaving for a period of time, make sure that the heat is kept on your property. It may be difficult to convince your tenants to leave their heat on when they are away, especially if they are responsible for paying their own utilities. You should inform them that the heat can help prevent pipes from freezing, and if pipes freeze and burst, it can cause a lot of water damage to the property and to their possessions.
If you are afraid a pipe will freeze, you can allow the faucet to drip slightly. Allowing the faucet to be open like this will relieve pressure in the system. If a pipe freezes, it is actually the pressure that is created between the blockage and the faucet that will cause the pipe to burst. Allowing the faucet to be open will prevent this pressure from building up and thus, keep the pipe from bursting.
Pipes are often located in cabinets. When the temperatures drop, it is a good idea to keep these cabinet doors open so that the heat from the rest of the house can keep the pipes warm as well. You should also keep all interior doors open so that the heat can flow throughout the home.
You should caulk any holes or cracks that exist near pipes. This should be done on both interior and exterior walls. Doing so can help keep the cold air out and the warm air in.
For pipes that are easily accessible, the electrical heating tape may be an option to keep them from freezing. This tape can be applied directly to the pipe.
Pipes that are located in areas that do not have proper insulation, such as basements or attics, may need extra insulation to keep from freezing. Pipes in basements or attics are not the only ones that may not be properly insulated from the cold. If you have had a problem with pipes freezing anywhere in your home, extra insulation could be the cure.