How Do I Stop Pipes From Freezing In An Older LI Home
Keep your thermostat no lower than 55 degrees, even when you travel, and seal the drafts that let cold air reach your pipes. Older Long Island homes with uninsulated crawl spaces, exterior walls, and basement pipe runs are the ones that freeze first, so the fix is part heat, part insulation, part timing around the holidays when the house sits empty.
Why older homes are more at risk
Homes built before the 1980s often have pipes running through exterior walls, unheated crawl spaces, or attached garages. Newer homes keep plumbing inside the insulated envelope. If your house has an addition, a converted porch, or a basement with a bulkhead door, check those areas first. Cold spots near rim joists and sill plates are common culprits.
Start by walking your basement and crawl space with a flashlight. Look for daylight around foundation vents, gaps where pipes pass through walls, and old fiberglass insulation that has fallen away from joists. Foam pipe sleeves cost very little and take an afternoon to install on exposed runs. For pipes along exterior walls with no access from inside, insulating the wall cavity from outside during a renovation is the long term fix, but a space heater on a thermostat in that area can get you through this winter.
Energy Star has a room by room guide for sealing air leaks that also helps with pipe freezing, since cold air infiltration is usually the real problem, not just low outdoor temperatures.
Windows, doors, and the holiday gap
Late fall is when storm windows go up and door sweeps get checked, and both jobs matter more than people think. A drafty window well above a kitchen sink line can drop the temperature under the counter by ten degrees or more on a windy night. Caulk the exterior trim, check weatherstripping on exterior doors, and make sure storm windows are actually latched, not just dropped into the track.
The bigger risk is the week you are away for Thanksgiving or the stretch between Christmas and New Year's. A house with no one home and a thermostat left too low is the classic setup for a frozen and then burst pipe, and insurance claims spike every year in that window. Before you leave, open cabinet doors under sinks on exterior walls so warm air can reach the pipes. Let a faucet drip slightly on the coldest nights. If you are closing on a sale or purchase around year end and the house will sit vacant even briefly, ask whoever holds the keys to keep the heat on and check the property, not just lock the door and leave.
If you travel often in winter, a smart thermostat that you can check from your phone is worth the small cost. You will know within minutes if the heat shuts off or the oil burner stops firing, instead of finding out when a pipe bursts.
What to do if a pipe does freeze
If water stops running from a fixture on a cold day, do not assume the worst. Shut off the main water valve first, then use a hair dryer or heating pad on the suspected frozen section, working from the faucet back toward the blockage. Never use an open flame. FEMA's winter weather guidance covers the same steps if you want a second reference to keep handy.
If a pipe has already burst, shutting the main valve is the first move before anything else, including calling a plumber. Know where that valve is before winter starts, not during an emergency. Walk the basement now, find it, and if it is hard to reach or corroded, that is worth fixing before the cold sets in rather than after a leak starts.
Most of this is a half day of work spread across a few weekends in November. Walk your basement, check your exterior walls, find your main shutoff, and set your travel thermostat plan before the first real cold snap arrives.