Pipes can freeze when temperatures drop below 32 degrees Fahrenheit, but they most commonly freeze at temperatures of 20 degrees and below. The longer the weather remains below freezing, the more likely it is that pipes can freeze if not properly protected and winterized. The water inside pipes can start freezing in just 6 hours, though it’s more common to see damage and issues after one to three days of subfreezing temperatures. Pipes closest to an exterior-facing wall, an attic, or windows are more susceptible to freezing, but pipes themselves do offer some protection from cold temperatures. Exterior pipes are most susceptible to freezing temperatures because of exposure to the elements. Knowing how long a freeze can take to set in can help you keep your pipes from freezing.
It is important to note that sustained temperatures below 20 degrees Fahrenheit, especially for six or more hours, will likely result in frozen pipes without preventative measures. To prevent pipes from freezing, keep your heating on and set your thermostat to a low temperature so your pipes dont freeze. Insulate pipes and water tanks, and open cabinet doors that have pipes in them to allow warmer air from inside the house to circulate to the pipes. Leave your faucets dripping slowly, and turn on a faucet on the lowest level so its running just a trickle. If you have exposed/accessible piping, you can wrap it with inexpensive insulation for peace of mind.
