Frozen Pipes In Alberta: How To Prevent Them & What To Do

Every Alberta homeowner knows the deep-freeze weeks are coming — the stretch where -30°C is just a number on the forecast and the furnace never seems to stop. That cold is exactly when water sitting in your pipes can freeze, expand and split a line wide open. A burst pipe can pour water into a home astonishingly fast, but the good news is that frozen pipes are one of the most preventable winter disasters there is.

Why Alberta Pipes Freeze — And Where

Water is unusual: it expands by roughly nine percent as it freezes, and it does so with tremendous force. When ice forms inside a pipe it doesn't just block the flow — it builds pressure between the ice plug and a closed tap until the weakest point in the line gives way. The pipe often bursts on the thaw, when water starts moving again through the damaged section.

Not every pipe is equally at risk. The trouble spots in Alberta homes are almost always the ones running through cold, unheated or poorly insulated space:

• Exterior walls where plumbing sits close to the cold sheathing.
• Crawlspaces, attics and garages that stay far colder than the living area.
• The water-line entry point where the service line comes into the home.
• Outdoor hose bibs — especially dangerous if a hose is left connected, trapping water at the tap.

The Temperatures That Matter

As a rule of thumb, poorly insulated pipes can start to freeze once it drops below about -10°C outside, and the danger rises sharply in extreme cold below -25°C. Inside, your plumbing is at risk if the indoor temperature falls below roughly 14°C — which is why utilities across the province recommend keeping your thermostat at 20°C or higher, and never letting a vacant home go cold in winter.

Prevent It: Before The Cold Snap

The cheapest fix is the one you do in advance. Ahead of winter:

• Insulate exposed pipes with foam sleeves — inexpensive and available at any hardware store — focusing on exterior walls, crawlspaces and the garage.
• Disconnect and drain outdoor hoses, then shut off and drain the outdoor hose bibs.
• Seal drafts near pipes: cold air pouring through a gap in the rim joist or foundation is a common culprit.
• Find your main shut-off valve now and make sure it turns freely, so you can stop the water fast in an emergency.

Prevent It: During An Extreme Cold Warning

When a deep freeze hits, add these habits:

• Keep the heat up — at least 20°C, day and night, throughout the home.
• Let a tap trickle. A slow drip of water keeps it moving, which makes freezing much harder.
• Open cabinet doors under sinks on exterior walls so warm household air can circulate around the pipes.
• Keep interior doors open to help heat reach every room, especially those against outside walls.

What To Do If A Pipe Freezes

If a tap runs to a trickle or stops entirely in cold weather, you likely have a freeze starting. Act quickly — the longer a pipe stays frozen, the further the ice spreads and the more likely it is to burst.

• Shut off the main water supply in case the pipe has already cracked and fails when it thaws.
• Open the affected tap so water and steam can escape as the ice melts.
• Apply gentle heat — a hair dryer, heat lamp, space heater or warm towels — starting at the tap end and working back toward the blockage.
• Never use an open flame or blowtorch. It can damage the pipe and cause a fire.

If you can't reach the frozen section, or the pipe has already burst, call a licensed plumber.

What To Do If A Pipe Bursts

Speed is everything. Shut off the main water valve immediately, then open taps to drain the remaining water from the lines. If water is anywhere near outlets, switches or the electrical panel, cut the power to that area. Move belongings out of the water, call a licensed plumber, and contact your insurance provider to document the damage. The first few minutes decide whether this is an inconvenience or a major loss.

When You're Away For The Holidays

An empty house in an Alberta cold snap is the classic frozen-pipe scenario. If you'll be gone more than a day or two, the safest move is to shut off the main water supply and drain the pipes so a failure while you're away can't flood the home. If you'd rather leave the water on, keep the furnace at 20°C or higher and arrange for someone to check the house regularly. For longer trips, draining the system is the sure bet.

Frozen Pipes: Quick Answers

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This article is general home-maintenance information, not plumbing or professional advice. Prevention steps and temperature figures are summarized from EPCOR, the Government of Canada and emergency organizations, and can vary by home. For frozen, burst or damaged plumbing, contact a licensed plumber. Home Pros Group provides furnace, duct and dryer-vent cleaning and does not perform plumbing repairs.