How to Protect Your Pipes in Frigid Weather

Protect your pipes from freezing this winter! Discover essential tips to prevent burst pipes and costly water damage with our expert advice.

When the mercury drops, your water pipes become increasingly vulnerable and may freeze and burst. When water freezes, it expands, and the force of that expansion can split a copper pipe wide open. A burst water line can cause tens of thousands of dollars in damage and forever destroy personal possessions in the path of the raging water. The good news is that you can take steps to help prevent a burst pipe and the chaos that it causes.

When the mercury drops, your water pipes become increasingly vulnerable and may freeze and burst. When water freezes, it expands, and the force of that expansion can split a copper pipe wide open. A burst water line can cause tens of thousands of dollars in damage and forever destroy personal possessions in the path of the raging water. The good news is that you can take steps to help prevent a burst pipe and the chaos that it causes.

An ounce of prevention

If you’ve ever experienced a frozen water line that did not burst wide open, consider yourself lucky! Before that luck wears out, it’s smart to take a few steps to prevent your pipes from freezing and keep water running all winter long.

• Turn on your faucets just a little. A faucet left dripping at the fixture farthest from the main water inlet allows just enough warm water movement within the pipes to reduce the chance of a freeze.
• Insulate your above-ground pipes. Pipes in unfinished spaces are most susceptible to freezing. Insulating these pipes prevents them from freezing during most mild-to-medium chills — even when faucets are off. Be sure to focus on insulating pipes in the crawl space, basement, attic, and any pipes that are located along exterior walls, such as a main water line and shut-off valve.
• Open your cabinets. If the pipes that supply water to your kitchen or bathroom sink faucets are prone to freezing, leave the cabinet doors open at night. The open doors allow warm air to circulate in the cabinet and warm the cold pipes.
• Install electric pipe heating cable. If you’re in an area where temperatures frequently drop below freezing, think about purchasing pipe heating cable, commonly known as heat tape. Heat tape is an electric appliance that is attached to copper pipe. When temperatures drop, a thermostat activates the heat tape and keeps the pipe warm to prevent it from freezing. Heat tape is also useful for thawing out a pipe that’s frozen.

Heat tape must be used cautiously, and strictly according to the manufacturer’s instructions. Throughout my 20 years as a professional home inspector, I frequently observed heat tape being misused more often than being used correctly. It wasn’t unusual for me to find heat tape that got so hot, it singed wood framing or insulation! To prevent a fire, never overlap one section of heat tape on top of another and never add insulation to a pipe where heat tape is being used. Doing so can cause the heat tape to overheat and lead to a fire. Lastly, heat tape is not designed to be plugged in all the time. Once the pipe thaws, unplug the heat tape.

If the same pipes in your home freeze over and over again, you are better off replacing that section of copper pipe with PEX, which can be rerouted through warmer areas of the home instead.

I did this exact project in my home some years back. The water supply for our kitchen sink ran through the exterior wall and frequently froze in cold weather. To fix the problem, I disconnected the copper pipe, inserted a section of PEX tubing, and ran it inside the kitchen cabinet, where it never froze again!