BALTIMORE, MD — With wind chills that will feel like the teens the next two nights in Maryland, and overnight lows headed into the 20s, it's important to know how to prevent your home's water pipes from freezing. Frozen water pipes in unheated basements and crawl spaces can be messy and expensive to fix. But if you do wake up to a frozen faucet, there are steps you can take to safely thaw out a frozen water line without burning down the house.
Fire officials say it's important during long cold spells to monitor automatic sprinkler systems, fire pumps, hoses and hydrants. Whether or not pipes in these systems actually burst, any freezing of water can block water flow needed in case of fire.
If you have a pipe that bursts, AAA Mid-Atlantic offers these tips to help you file and manage insurance claims.
Make a list of the damaged articles and take photos.
Save the receipts for what you spend — including additional living expenses if you must leave your home until repairs are completed — and submit them to your insurance company for reimbursement.
Standard homeowners policies will cover most of the kinds of damage that result from a freeze. For example, if house pipes freeze and burst or if ice forms in gutters and causes water to back up under roof shingles and seep into the house. You would also be covered if the weight of snow or ice damages your house.
If your home sustains water damage, it is important to make sure that it is properly dried and repaired to prevent any potential problem with mold. Remember, mold cannot survive without moisture.
Check with your agent or insurance company so you will be sure what your policy covers.
To prevent the formation of ice in pipes due to freezing temperatures and to prevent the pipes from bursting, experts recommend that you:
Always place piping in heated areas of a building.
Properly insulate attics, exterior walls and other areas lacking adequate heating.
Repair broken windows, ill-fitting doors and other conditions that allow heat loss.
Keep exterior doors closed, even if not in the immediate vicinity of piping.
Maintain heat in buildings at all times. No area with piping should be allowed to fall below 40°F.
Follow these tips from the American Red Cross, Washington Suburban Sanitary Commission and Montgomery County Fire and Rescue Services:
There are three common causes of frozen pipes:
1. Quick drops in temperature
2. Poor insulation 3. Thermostats set too low
Luckily, there are a number of preventative steps you can take to keep your pipes from freezing:
Check the insulation of pipes in your home's crawl spaces and attic. Exposed pipes are most susceptible to freezing.
Heat tape or thermostatically controlled heat cables can be used to wrap pipes. Be sure to use products approved by an independent testing organization, such as Underwriters Laboratories Inc., and only for the use intended (exterior or interior).
Seal leaks that allow cold air inside near where pipes are located. Look for air leaks around electrical wiring, dryer vents, and pipes, and use caulk or insulation to keep the cold out. With severe cold, even a tiny opening can let in enough cold air to cause a pipe to freeze.
Use an indoor valve to shut off and drain water from pipes leading to outside faucets. This reduces the chance of freezing in the short span of pipe just inside the house.
A trickle of hot and cold water might be all it takes to keep your pipes from freezing. Let warm water drip overnight, preferably from a faucet on an outside wall.
Keep your thermostat set at the same temperature during both day and night. You might be in the habit of turning down the heat when you're asleep, but further drops in the temperature – more common overnight – could catch you off guard and freeze your pipes.
Open cabinet doors to allow heat to get to un-insulated pipes under sinks and appliances near exterior walls.
Keep any garage doors closed if there are water pipes or supply lines in the garage. If attached to home, consider opening the door to the garage to allow home heat to enter the garage. DO NOT use kerosene or other fuel fed heating devices in the garage to heat it.
If Your Pipes Do Freeze...
If you turn on your faucets and nothing comes out, leave the faucets turned on and call a plumber.
If your house or basement is flooding, turn off the water valve and immediately call 911.
Do not touch or use electrical appliances in areas of standing water due to electrocution concerns.
Never try to thaw a pipe with a torch or other open flame because it could cause a fire hazard. Every year, many building fires are caused by people trying to thaw frozen pipes. All open flames in homes present a serious fire danger, as well as a severe risk of exposure to lethal carbon monoxide.
You may be able to thaw a frozen pipe with the warm air from a hair dryer. Start by warming the pipe as close to the faucet as possible, working toward the coldest section of pipe. DO NOT use a blow torch or any other open flame to try and thaw out potentially frozen pipes.
Again, if your water pipes have already burst, turn off the water at the main shutoff valve in the house; leave the water faucets turned on and call 911. Make sure everyone in your family knows where the water shutoff valve is and how to open and close it. Likely places for the water turn-off valve include internal pipes running against exterior walls or where water service enters a home through the foundation.
If you will be going away during cold weather, leave the heat set to a temperature no lower than 55ºF.
Why Frozen Pipes Are a Problem
Water expands as it freezes. This expansion puts extreme pressure on whatever is containing it, including metal or plastic pipes. Pipes that freeze most frequently are those that are exposed to severe cold, like outdoor water faucets, swimming pool supply lines, water sprinkler lines, and water supply pipes in unheated interior areas like basements and crawl spaces, attics, garages, or kitchen cabinets. Also, pipes that run against exterior walls that have little or no insulation are also subject to freezing.
A 1/8-inch crack in a pipe can leak up to 250 gallons of water a day, causing flooding, serious structural damage, and the immediate potential for mold.
In the U.S., frozen pipes cause significant damage every year, but they often can be prevented. Taking a few simple steps, even now, may save you the aggravation and expense.
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