Preventing Frozen Pipes

Pipes are the silent arteries of your home, and like any living system, they don't respond well to sudden, deep freezes. When the temperature drops into the single digits, water inside exposed pipes can expand as it turns to ice, exerting enough pressure to split metal or PVC plumbing wide open. The aftermath is rarely just a leak; it is often a catastrophic flood that destroys floors, insulation, and drywall before you even wake up to realize what has happened. Prevention is fundamentally about managing thermal stability. You are trying to keep the water temperature inside your pipes above the freezing point, or at the very least, keeping the water moving so it cannot settle and crystalize. Done well, this project is a low-cost, high-reward exercise in home defense that allows you to sleep soundly even when the thermometer hits zero.

  1. Seal Cold Air Gaps Now. Use expanding foam or caulk to seal cracks in exterior walls where pipes enter the home. Cold drafts are the primary cause of localized freezing in bathrooms and kitchens.
  2. Clear Exterior Water Sources. Unscrew all garden hoses from outdoor spigots and store them away for the season. If a hose remains attached, the trapped water can expand backward into the internal pipe and cause a burst inside the wall.
  3. Wrap Pipes in Unheated Zones. Measure your pipe diameter and wrap all exposed pipes in unheated areas—like the garage, basement, or crawlspace—with foam pipe sleeves. Secure the sleeves with duct tape to ensure a tight, seam-free fit.
  4. Warm Pipes With Ambient Heat. When temperatures are forecasted to hit freezing, open the vanity and kitchen cabinet doors beneath your sinks. This allows warm household air to circulate directly around the plumbing lines.
  5. Keep Water Moving Through Lines. Open the faucet farthest from the water main just enough to create a slow, steady drip. Moving water is significantly harder to freeze than standing water, and this tiny motion can save an entire pipe run.
  6. Lock in Minimum Heat Protection. If you are leaving the house for an extended period during winter, never turn the heat completely off. Set your thermostat to at least 55 degrees Fahrenheit to ensure the home's envelope stays warm enough to prevent the pipes from cooling.