Frozen Pipe Timeline: What to Do Four Weeks Before, the Night Before and After a Freeze

Updated October 9, 2026

A frozen pipe is a plumbing problem with a calendar attached. Most of the prevention work is cheap and boring, and it goes much better when it is done before the first hard freeze. This timeline starts four weeks out and ends after the thaw, using guidance from the American Red Cross and two local governments.

Scope: General prevention and response tips for homes with ordinary water supply lines. It does not replace advice from a licensed plumber, your utility or your insurer. Safety comes first: never use open flame on a pipe.

Know where pipes freeze first

The Red Cross explains that water expands as it freezes, and that pressure can break any pipe. Walk the house with this list:

Where pipes freeze most often (Red Cross)

Location type	Examples
Exposed to severe cold	Outdoor hose bibs, pool supply lines, sprinkler lines
Unheated interior spaces	Basements, crawl spaces, attics, garages, kitchen cabinets
Exterior walls with little insulation	Pipes running along those walls

Four weeks before the first freeze

• Find and test the main shut-off valve. A City of Everett brochure advises locating and testing it ahead of time, because a break means water must be stopped quickly. Make sure everyone in the household knows where it is.
• Locate the water meter and keep snow cleared from it, since staff may need access.
• Inspect unheated areas. Look in the garage and under kitchen and bathroom cabinets. The Red Cross says to insulate both hot and cold lines in those spots.
• Pick your insulation. Options include pipe sleeves and UL-listed heat tape or cable. Follow the product instructions. The Red Cross adds that even a quarter inch of newspaper helps in areas that rarely see long freezes.
• Seal air leaks around incoming pipes, as the Everett brochure suggests.

Two weeks before

• Hoses and hose bibs: Remove, drain and store hoses. Close the inside valves that feed outdoor hose bibs, then open the outside bibs so leftover water can drain and expand safely.
• Pool and sprinkler lines: Drain them following the manufacturer’s or installer’s directions. The Red Cross says not to put antifreeze in these lines unless directed.
• Travel plans: If you will be away in cold weather, leave the heat on at no lower than 55°F.

The day the forecast turns cold

• Keep the garage door closed if supply lines run through it.
• Open kitchen and bathroom cabinet doors so warmer air reaches the pipes. Move cleaners and chemicals out of the reach of children first.
• Let cold water drip from faucets served by exposed pipes. Even a trickle helps.
• Keep the thermostat at the same temperature day and night.

Invented numbers: Suppose holding the thermostat steady costs $3 more per night, and the cold lasts 6 nights. 6 × $3 = $18. A $1,000 repair or insurance deductible equals $1,000 ÷ $3 ≈ 333 nights of that extra heat. The Red Cross makes the same trade-off: a higher heating bill is cheaper than a burst pipe.

If only a trickle comes out

1. Suspect a frozen pipe, most likely along an exterior wall or where the water service enters through the foundation.
2. Keep that faucet open so melting water has somewhere to go. Per the Lake County, Illinois guidance, opening the nearest faucet a quarter turn works.
3. Only in a dry, safe area, apply heat with a heating pad, hair dryer, portable space heater kept away from flammable materials, or towels soaked in hot water. Do not use electric equipment around leaked water. Do not use a blowtorch, kerosene or propane heater, charcoal stove or any open flame.
4. Keep applying heat until full pressure returns.
5. Check every other faucet. If one pipe froze, others may have too.
6. If you cannot find the frozen section, cannot reach it or cannot thaw it, call a licensed plumber.

If a pipe bursts

• Shut off the main water valve right away.
• If water has reached outlets or appliances, stay clear. The Red Cross warns against touching wet electrical equipment or touching equipment while standing in water. Call the utility or an electrician if power cannot be isolated from a dry, safe location.
• Photograph and document the damage for your insurer.
• Dry the area quickly. Moisture left behind can lead to mold.

After the thaw

• If the water was shut off, have any damaged pipe repaired before restoring service. Once safe, turn the water back on slowly while watching for leaks.
• Look for cracked or split pipe, an expanded section or a joint that has pulled apart. A pipe that froze may be weakened even if it did not burst.
• Consider permanent insulation or heat tape for the spots that froze.

A rough time budget

These are planning estimates, not measurements. Your home will differ.

Estimated time for the prevention tasks

Task	Estimated time
Find and test the main shut-off valve	10 minutes
Drain and store hoses, close and open the valves	20 minutes
Inspect and wrap exposed pipes in one garage or crawl space	60 minutes
Open cabinets and set the drip on a cold night	10 minutes
Total	About 100 minutes (1 hour 40 minutes)

An hour and forty minutes spread over four weeks is a small price compared with a flooded basement. The best sign you did it right is a quiet winter.

Sources and scope

Sources reviewed October 9, 2026. Rules, rates and product terms can change. Names, businesses and dollar figures in examples are invented illustrations, not individual advice or reports of personal experience.

• American Red Cross — preventing and thawing frozen pipes
• Lake County, Illinois — frozen pipes
• City of Everett, Washington — preventing frozen pipes brochure
• American Red Cross — flood safety and wet electrical equipment