Mid October is the right time to think about frozen pipes, because the first real cold snap in New York is usually only a few weeks out. Older homes across Brooklyn, Queens, the Bronx, Westchester, Nassau and Suffolk were built with copper supply lines in exterior walls, unheated crawl spaces, garages with laundry hookups and finished basements below grade. Every one of those is a place where a pipe can freeze, split and flood a room overnight.
This guide covers why frozen pipes burst, which lines are most at risk, a prevention checklist you can finish in a weekend, safe thawing, and the first 60 minutes after a burst pipe. It also explains, plainly, what a ReadiDry Protection Plan does and does not do when a pipe lets go.
Why frozen pipes burst in the first place
Water expands when it freezes. Ice takes up roughly nine percent more space than the liquid it came from, and copper, galvanized steel and PEX pipes do not stretch to make room for it.
The surprising part is that the pipe usually does not split where the ice is. When an ice plug forms inside a line, it seals off the section between the plug and the nearest closed faucet. As the plug grows, it pushes the trapped water toward that faucet with nowhere to go. Pressure climbs until the weakest point, often a joint, a fitting or a thin stretch of old copper, gives way.
That is why the split is often found several feet from the frozen section, and why the flooding tends to start when the house warms up. The ice melts, the plug releases, and the supply pushes through the split at full line pressure until someone shuts the main valve.
Which pipes are at risk in New York homes
The lines that freeze are the ones that sit close to outdoor temperatures with little warm air around them. In the New York launch area, the usual suspects look like this.
Brooklyn, Queens and Bronx rowhouses and semi-attached homes
Many pre-war brick rowhouses have copper supply lines run through exterior walls, often on the kitchen or bathroom side where the original plumber took the shortest route. Insulation in those walls is thin or missing. A kitchen sink on an outside wall with a closed cabinet door is one of the most common freeze points in the city.
Westchester colonials and capes
Older colonials in Westchester tend to have unheated crawl spaces, attic pipes that feed a second-floor bath, and garages turned into laundry rooms without adding heat. Hose bibs on the north side that were never drained are another regular source of trouble.
Nassau and Suffolk split-levels and ranches
Long Island homes often have a half-level garage with a washer hookup, a finished basement with a bathroom, and long supply runs along the foundation. Sump pump discharge lines can freeze where they exit the foundation wall, which backs up the pump and floods the basement from another direction.
Across all three areas, the lines most worth your attention are:
- Supply lines in exterior walls, especially behind kitchen and bathroom cabinets.
- Pipes in unheated crawl spaces, attics and garages.
- Outdoor hose bibs and the short section of pipe feeding them from inside.
- Lines near drafty foundation vents, rim joists and basement windows.
- Any pipe in a room you keep closed off and unheated to save on fuel.
How to prevent frozen pipes before the first freeze
Prevention is cheap and most of it takes an afternoon. Work through this list before the forecast first drops below 20 degrees.
- Insulate exposed lines. Foam pipe sleeves cost a few dollars per length at any hardware store. Wrap every supply line you can reach in the basement, crawl space, garage and attic, with extra attention to the first few feet where the service enters the house.
- Seal drafts near pipes. Cold air moving across a pipe freezes it faster than still cold air. Use spray foam or caulk around pipe penetrations, rim joists, basement window frames and the gaps around dryer and bathroom vents.
- Disconnect garden hoses and drain outdoor spigots. A hose left attached traps water in the bib. Remove the hose, close the interior shutoff for that line if you have one, then open the outdoor spigot to drain it. Add an insulated faucet cover.
- Find your main shutoff and test it. In most New York homes the main valve is on the front foundation wall near the water meter. Turn it off and on once now so you know it moves. If it is an old gate valve that will not budge, have a plumber replace it with a ball valve before winter.
- Keep the heat on when you are away. If you travel over the holidays, leave the thermostat at 55 degrees or higher. Lower settings save very little and leave pipes in exterior walls with no margin.
- Open cabinet doors on exterior walls. During a cold snap, open the doors under kitchen and bathroom sinks on outside walls so warm room air can reach the pipes.
- Let a trickle run during deep cold. When temperatures fall into the teens or lower, let the faucet farthest from the main run at a slow drip. Moving water freezes more slowly, and an open faucet gives pressure a way out if a plug does form.
- Heat the rooms you forgot about. A garage laundry room, a mudroom addition or a basement bathroom with its own door needs some heat. A door propped open to the rest of the house is usually enough.
If your home has a sump pump, check that the discharge line slopes away from the house and is not kinked or buried under leaves, so the outlet does not freeze shut. For more on winter basement water, read our guide on what to do when a finished basement floods.
What to do if a pipe freezes but has not burst
You will know a pipe is frozen when you open a faucet and get a trickle or nothing while other fixtures work. Act before the house warms up on its own, because thawing is when the split shows itself.
- Open the affected faucet, both hot and cold. This relieves pressure as the ice melts and lets you see when water starts to flow again.
- Find the frozen section. It is usually along an exterior wall, in a crawl space or near a draft. Frost on the outside of the pipe is a giveaway.
- Warm the pipe gently, starting at the faucet end and working back toward the plug. A hair dryer, a heating pad wrapped around the pipe, or towels soaked in hot water all work.
- Never use an open flame, a propane torch or a heat gun on high. Open flames crack soldered joints, ignite framing and start house fires every winter.
- Check the pipe for splits, bulges or pinhole leaks once water is flowing. If you see any, shut the main valve and call a plumber before using that line again.
If you cannot find the frozen section, or the line runs inside a finished wall, shut the main valve, keep the faucet open and call a plumber. A wall warming around a hidden split is how a small freeze becomes a flooded floor.
The first 60 minutes after a burst pipe
What you do in the first hour decides how much of your house gets wet. Move through these steps in order.
Minutes 0 to 5: stop the water
Go straight to the main shutoff and turn it off. If the leak is on a single fixture with its own valve you can close that instead, but when in doubt, close the main. Then open the lowest faucet in the house to drain pressure from the lines.
Minutes 5 to 10: make the area safe
If water is near outlets, an electrical panel, a furnace or a plugged-in appliance, turn off power to that part of the house at the breaker before stepping in. Do not stand in water to reach a breaker. If the panel itself is wet, stay out and call your utility.
Minutes 10 to 30: move what you can
Get rugs, furniture, boxes and electronics off the wet floor. Put foil or plastic under furniture legs you cannot move. Pull up the corner of any carpet near the water line to see whether the padding is soaked. Supply line water is clean, so you can work in it safely. If it came from a sewer backup, keep people and pets away and let a crew handle it.
Minutes 30 to 45: document everything
Photograph the burst pipe, the water line on the walls, the floor, anything damaged, and the rooms above and below. Take a short video walking through the space. Write down when you found the leak and when you shut the water off. These records matter whether or not you file an insurance claim.
Minutes 45 to 60: get mitigation moving
Call for water extraction and drying, then call a plumber for the pipe. Two different trades do these jobs. The plumber repairs the split. A mitigation crew pulls water out of the floor, sets drying equipment and tracks moisture until the structure is dry. If you are a ReadiDry member, call the 24/7 line at (917) 242-5805, confirm your plan is active, and you will be told what to do while the crew is on the way.
Want a crew on call before the first freeze? Enroll in two minutes with no forms and no sales call, or call us with questions. Start my plan or call (917) 242-5805.
Why fast extraction and drying matters
Water does not stay where it lands. In the first few hours it soaks through carpet padding into the subfloor, runs under laminate and engineered wood, and wicks up drywall from the bottom edge, often a foot or more above the visible line. Base cabinets, door casings and the bottom plate of framed walls absorb water from behind, where you cannot see it.
Mold is the clock that matters most. In a heated house, mold can begin growing on wet drywall paper, wood and carpet within 24 to 48 hours. Once it is established, drying is no longer enough and the materials have to come out. A finished basement that could have been dried in place becomes a demolition job.
That is the case for professional extraction and drying on the same day as the burst. Commercial air movers push air across wet surfaces, dehumidifiers pull moisture out of the room, and moisture meters tell the crew when the subfloor and framing are back to normal readings rather than just dry to the touch. A household fan and a shop vac cannot do that in a basement with a wet slab. What it costs when drying starts late is laid out in our guide to water damage restoration costs in New York.
What a ReadiDry plan does for a burst pipe
Burst and frozen pipes are the first event type the ReadiDry Protection Plan is built around. Here is what the plan does when a member calls about one, within the limits in the benefit schedule.
- Emergency water extraction from floors and finished areas.
- Drying equipment, meaning commercial air movers and dehumidifiers, set up in the home.
- Moisture monitoring with return visits until materials read dry.
- Removal of mitigation debris such as wet carpet padding.
- Sanitation of affected surfaces.
- Photo documentation and a moisture log delivered at dry sign-off.
Members are dispatched ahead of non-member calls and get a text with the crew lead's name and a real arrival window. On arrival the crew lead walks the space with you, takes photos, and confirms what the benefit schedule includes before any work starts. The full sequence is laid out in how the plan works, and the complete list is in what the plan includes.
What the plan does not do
ReadiDry is not insurance. The plan handles the emergency mitigation work and nothing beyond it. Repairing the pipe itself is separate and is a plumber's job. Rebuilding is separate: replacing drywall, flooring, cabinets and paint after the space is dry is not part of the plan. A new plan does not cover damage that already exists when the plan starts, and it does not include mold that was already growing before enrollment. The plan makes no promise about what your homeowners insurance will pay. Every service and limit is written in the benefit schedule and the Plan Terms, emailed within one business day of enrollment.
The 14-day waiting period
A plan becomes active 14 days after payment is confirmed. That timing matters. Enroll in mid October and your plan is active well before Thanksgiving. Wait for the first hard freeze in late December and you will have a two-week gap during the coldest stretch of the year. The plan has to already be active on the day the pipe bursts.
The cost logic: a plan versus scrambling on a holiday weekend
Pipes rarely burst on a Tuesday at 10 a.m. They burst at 2 a.m. on the Saturday of a holiday weekend, after the temperature has sat in the single digits for three nights. That is also when every water damage company in the region has a full call board and the phone goes to voicemail.
Without a plan, you are calling companies you have never vetted, agreeing to whatever rate is quoted, and hoping the first crew that says yes is licensed and shows up. As a general industry estimate, one emergency extraction and drying visit for a single room in the New York area often lands in the low thousands of dollars, and overnight or holiday calls tend to cost more. Our home page calculator starts from a user-set estimate of $3,000 for one visit, which you can change. ReadiDry does not promise savings, and your cost without a plan depends on the size of the loss, the company you reach and the day you reach them.
With a plan, the number is already settled. The plan is $399 a year or $39 a month, billed through Stripe secure checkout. Both options renew automatically, and yearly members get a reminder email 30 days before renewal. The crew comes from a working local mitigation company with uniformed technicians, marked trucks and its own equipment, licensed for water mitigation work in every area served. There is no shopping for a company at 2 a.m., because the services and limits were written down before you paid.
If you change your mind, you can cancel online or by email to contact@readidry.com. Yearly members can cancel at any time, and monthly members can cancel any time after their first 2 monthly payments. Cancel within 30 days of enrollment, before any plan service is used, for a full refund under the Refund and Cancellation Policy. The plan is written for single-family homes. Multi-unit and unusual properties go to a quick review first, which you can start when you request a call.
Frozen pipes FAQ
At what temperature do pipes freeze in a New York home?
There is no single number, because it depends on how exposed the pipe is and how long the cold lasts. As a general rule, uninsulated pipes in exterior walls or unheated spaces become a concern when outdoor temperatures hold below about 20 degrees for several hours. A windy night does more harm than a still one at the same temperature.
Should I shut off the water when I leave for a winter trip?
If the house will be empty for more than a few days, yes. Shut the main valve, open the faucets to drain the lines, and leave the heat at 55 degrees or higher. A burst pipe in an empty house can run for days before anyone notices.
Does a ReadiDry plan include the plumber who fixes the pipe?
No. Repairs to the source of the water, including plumbing, are separate from the plan. The plan handles the extraction, drying, monitoring and documentation after the pipe fails. ReadiDry is not insurance and does not pay for repairs or rebuilding.
Can I enroll after a pipe has already burst?
You can enroll at any time, but the plan will not apply to that event. A plan becomes active 14 days after payment is confirmed, and a new plan does not cover damage that already exists when the plan starts. The time to enroll is before the first freeze, not after the first flood.
How fast will a crew arrive after I call?
ReadiDry does not advertise a fixed arrival time. Members are dispatched ahead of non-member calls and get a text with the crew lead's name and a real arrival window. The line is answered 24/7, and the ZIP checker on the home page confirms whether your address is in the launch area. More answers are in the plan questions answered section.
Ready before the first cold snap? Enroll in two minutes with no forms and no sales call, or call us with questions. Start my plan or call (917) 242-5805.
