We often worry about protecting our homes from fire, but we rarely consider that its polar opposite - water - can do an equal amount of damage. Some people whose homes have suffered water damage have had to deal with costly repairs in their plumbing systems, sewers, foundations, and walls.
In the winter, your water pipes can freeze if they aren’t sufficiently insulated. When the water expands inside the pipe, the pipes might actually explode! This is both dangerous and often very expensive to repair. Make sure you have sufficient insulation around your water pipes to prevent freezing, and keep all the seals around your pipes tight against the cold outdoors.