Set Your Heat Too Low This Winter and Frozen Pipes Can Ruin Your Holidays

Turning your thermostat too low before a winter trip is one of the fastest ways to come home to frozen pipes, a flooded floor, and a ruined holiday. It feels like a smart way to trim the heating bill, but in a New Jersey cold snap the savings are pennies compared to the cost of drying out a home after a burst supply line. After 27 years responding to winter water losses across all 21 NJ counties, our team at RDC Restoration sees the same avoidable disaster every January — and it almost always starts with a heat setting that was a few degrees too low.

Why setting your heat too low leads to frozen pipes

Water expands as it freezes. When the air inside an unheated wall cavity, crawl space, or attic drops below 32°F, the water sitting in your supply lines can turn to ice and push outward with enormous force. That pressure has nowhere to go, so it splits the pipe — often at a joint or along a run against an exterior wall. The cruel part is that you rarely notice at the moment of the freeze. The pipe cracks while it is still frozen and holds. The flood begins when the ice thaws, the line reopens, and pressurized water pours out of the break, sometimes for days while you are still away.

New Jersey winters are especially punishing because they swing. A stretch of mild days lulls homeowners into lowering the heat, then an overnight Arctic front drops temperatures 30 degrees in hours. Homes near the shore and older houses with uninsulated pipe runs are the most vulnerable, but we have pulled saturated drywall out of brand-new construction too.

The chain reaction: from frozen pipes to major water damage

A single burst half-inch supply line can release several gallons a minute. Left running while you are on vacation, that turns into thousands of gallons soaking into subfloors, ceilings, and framing. What starts as a plumbing problem quickly becomes a restoration project involving:

• Structural saturation — warped hardwood, delaminated subfloor, and sagging ceilings below the break.
• Mold growth — given the right moisture, mold can begin colonizing porous materials within 24 to 48 hours, which is why our mold remediation crews are often called right behind the water cleanup.
• Ruined finishes and belongings — plaster, cabinetry, and anything stored in a finished basement.
• Basement flooding — water follows gravity to the lowest point, which is where our basement waterproofing and extraction work usually begins.

The math is simple and brutal: a few dollars saved on heat can turn into a five-figure water damage restoration claim. Keeping the heat at a safe level is the cheapest insurance you will ever buy.

What temperature should you set when you leave?

Set your thermostat no lower than 55°F while your home is empty in winter. That number is the widely accepted floor for a reason: it keeps interior air — including the air inside walls and cabinets where pipes run — comfortably above freezing even when an exterior wall gets cold. If your home has a history of freeze-ups, a poorly insulated addition, or pipes on an outside wall, we typically recommend nudging it to 60°F for extra margin. The handful of dollars in heating cost is nothing next to a burst pipe.

Never shut the heat off entirely, even for a short trip. And if you lose power during a storm while you are away, the house can chill fast — another reason to build in a buffer and have someone check on the property.

How to prevent frozen pipes before you go away

Beyond the thermostat, a few minutes of prep dramatically lowers your risk:

• Open cabinet doors under kitchen and bathroom sinks so warm room air can reach the pipes behind them.
• Insulate exposed pipes in the basement, garage, crawl space, and attic with foam sleeves or heat tape.
• Seal drafts around rim joists, dryer vents, and where pipes pass through exterior walls — cold air infiltration is what freezes pipes even when the thermostat reads fine.
• Let a faucet drip on the coldest nights; moving water is far harder to freeze.
• Know your main shutoff and consider closing it and draining the lines for longer absences.
• Install a smart thermostat and a water-leak sensor so you get a phone alert if the temperature drops or moisture is detected.
• Ask a neighbor to check in every day or two while you travel.

What to do if you come home to a burst pipe

If you walk into water, act fast — the first 24 hours decide how much of your home is salvageable. Shut off the main water valve, kill power to affected areas if it is safe, and call for help. RDC Restoration runs a 24/7 emergency line at (908) 253-9000, with dispatch hubs in Berkeley Heights and Piscataway so we can reach homes across New Jersey quickly. Our technicians extract standing water, set commercial drying and dehumidification equipment, and document everything for your insurer — we offer direct insurance billing to take that stress off your plate.

Every drying and remediation job we perform follows IICRC industry standards, and our crews hold IICRC (WRT, ASD), NORMI, and AHERA certifications. We are BBB A-rated with a 4.9-star customer rating, and we serve all 21 NJ counties. See our full coverage on the service areas page.

Frequently asked questions about frozen pipes in winter

How low can I safely set my heat when going away for the holidays?

Keep it at 55°F or higher. That keeps the air around your pipes above freezing while still saving energy. For homes with pipes on exterior walls or a past freeze, 60°F gives you a safer margin.

How long does it take for pipes to freeze?

Pipes can begin to freeze in as little as a few hours once the surrounding air drops below about 20°F, especially on exterior walls or in unheated crawl spaces. Wind and drafts speed it up, which is why sealing air leaks matters as much as the thermostat.

My pipe froze but has not burst yet — what should I do?

Shut off your main water supply first so that if the pipe has cracked, it will not flood when it thaws. Then warm the area gradually with a hair dryer or space heater — never an open flame. If you cannot locate the freeze or you see any bulging, call a professional.

Does homeowners insurance cover frozen-pipe water damage?

Most policies cover sudden burst-pipe damage, but many exclude losses caused by leaving the heat off or the home unheated. Keeping your heat at 55°F and documenting your precautions protects your claim. RDC Restoration bills your insurer directly and documents the loss for you.

How fast can RDC Restoration respond to a burst pipe?

Our emergency line is staffed 24/7 at (908) 253-9000. With hubs in Berkeley Heights (Union County) and Piscataway (Middlesex County), we dispatch to homes and businesses throughout New Jersey around the clock.

Do not let a lowered thermostat turn into a flooded home. If you return to burst pipes or water damage this winter, call RDC Restoration any time at (908) 253-9000 or contact us here — certified, insured, and ready to restore your home and your peace of mind.