How do I prevent frozen pipes in my NB kitchen during winter?

Preventing frozen kitchen pipes in New Brunswick requires a combination of insulation, air sealing, and maintaining adequate heat flow to vulnerable plumbing runs — especially in older homes where pipes often travel through exterior walls or unheated crawl spaces. With NB winter temperatures regularly hitting minus 20 to minus 30 degrees Celsius, frozen pipes are a genuine risk that can lead to burst lines and thousands of dollars in water damage.

The most vulnerable pipes in NB kitchens are those running along exterior walls, which is a common configuration in older homes built from the 1960s through the 1990s. In these layouts, the kitchen sink supply lines often travel through the wall cavity between the insulation and the exterior sheathing, putting them directly in the cold zone. During a renovation, this is the perfect time to address the issue by rerouting pipes to the interior side of the insulation or adding proper pipe insulation within the wall cavity.

Immediate Steps for Existing Kitchens

If you are not currently renovating, there are several effective preventive measures. Open cabinet doors under the kitchen sink during extreme cold snaps to allow warm room air to circulate around the pipes. This simple step is surprisingly effective and costs nothing. If your kitchen is on a slab or above a crawl space, keep the thermostat at a minimum of 16 degrees Celsius, even when you are away — dropping the heat too low is one of the most common causes of frozen pipes in NB homes during January and February cold snaps.

Foam pipe insulation on all exposed supply lines under the sink and in accessible areas costs $2 to $5 per six-foot section at any NB hardware store and takes minutes to install. For pipes in harder-to-reach locations such as crawl spaces or joist bays, use self-sealing foam tubes rated for your pipe diameter. Pay special attention to any pipes near rim joists — the area where the floor framing meets the foundation wall — as this is one of the coldest spots in any NB home.

For chronically vulnerable pipe runs, electric heat trace cable is a reliable solution. These thermostatically controlled cables wrap along the pipe and activate automatically when temperatures drop near freezing. Installation runs $150 to $400 depending on the length of pipe, and the electricity cost is minimal since they only draw power when needed. A licensed electrician should install heat trace cable that is permanently wired, though plug-in versions are available for accessible areas.

Air sealing around pipe penetrations is equally important. Where pipes pass through exterior walls, rim joists, or the foundation, gaps around the penetrations allow frigid air to flow directly onto the pipe surface. Seal these gaps with expanding spray foam or caulk. During a renovation, your contractor should seal every penetration as standard practice.

If you are planning a kitchen renovation, discuss pipe routing with your plumber early in the design phase. Moving supply lines to interior walls adds $1,500 to $3,000 to the project but eliminates freeze risk permanently. For NB homeowners who have experienced a frozen pipe event, this investment pays for itself the first time you avoid an emergency plumber call at 2 AM in February — which typically runs $300 to $600 just for the after-hours service call, plus repair costs.

Keep your municipality's emergency water shut-off location marked and accessible. If a pipe does freeze, knowing how to shut off the main water supply quickly can be the difference between a minor inconvenience and a major flood.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Thirty Four Renovations
• Gionetterenovations