No — frozen pipes do not always burst, but the risk is real and unpredictable enough that a frozen pipe should always be treated as an emergency. When water freezes inside a pipe, it expands and creates pressure between the ice blockage and the closed faucet downstream. Whether that pressure causes a failure depends on the pipe material, how long it’s been frozen, the severity of the cold, and a degree of chance. Copper and older galvanized pipes are more vulnerable to splitting than PEX (cross-linked polyethylene), which is flexible enough to absorb some expansion — but no material is immune.

Why Colorado Cold Puts Pipes at Risk

Denver and the Front Range experience rapid, deep temperature drops that can catch homeowners off guard. A mild afternoon in the 50s can give way to overnight temperatures well below zero, especially at higher elevations in the foothills and mountain communities. Wind chill accelerates the freezing process — pipes in exterior walls, in unheated crawl spaces, in garages, or along north-facing walls where insulation is thin are the first to freeze. Irrigation system lines and hose bib connections are particularly vulnerable because they often have water remaining in exposed sections after the season ends.

Colorado also sees late-season cold snaps — a sudden freeze in April or even May can catch homeowners who’ve already put their irrigation systems back into service. That transition period is one of the more common times we respond to frozen or burst pipe calls.

Signs You Have a Frozen Pipe

  • No water flow or dramatically reduced flow at a faucet, especially after a cold night
  • Frost or condensation visible on an exposed pipe
  • A bulge or deformation in a visible section of pipe
  • Unusual sounds — gurgling or banging — when you try to run water
  • Water flowing from only some fixtures but not others, pointing to a localized blockage

What to Do If You Suspect a Frozen Pipe

First, locate your main water shut-off valve. If the pipe has already burst, you need to turn off the water immediately. If it hasn’t burst yet but you suspect it’s frozen, leave the affected faucet open slightly so water can flow once the ice melts — relieving pressure as thawing begins. Never use an open flame, propane torch, or heat gun to thaw a pipe — this is a fire hazard and can cause the pipe to fail. A hair dryer on low heat or warm towels applied to accessible frozen sections are safer options, but only attempt thawing if you can see the pipe and it’s accessible.

If you cannot locate the frozen section, if it’s behind a wall, or if you’re not confident in what you’re doing, call a plumber. The cost of a service call is far less than the water damage a burst pipe can cause — and the resulting mold remediation, drywall repair, and flooring replacement that follows a significant leak.

Preventing Frozen Pipes in Colorado Winters

The most effective prevention steps for Front Range homeowners: insulate pipes in unheated crawl spaces and garages, seal gaps in exterior walls where cold air can reach pipes, disconnect and drain garden hoses before the first freeze, and shut off and blow out irrigation systems in the fall. During extreme cold snaps, let faucets on exterior walls drip overnight — even a small trickle keeps water moving and dramatically reduces freeze risk. Keep interior temperatures above 55°F even when traveling.

If a Pipe Has Already Burst

Shut off the main water supply immediately, then call Done. We offer emergency plumbing response across the Denver metro and can locate the break, make the repair, and assess whether adjacent pipes were also damaged. Depending on the pipe material and age of your system, it may also be worth discussing a targeted repipe of the most vulnerable sections to prevent future events.

If you’re dealing with a frozen or burst pipe right now, contact Done for emergency plumbing service. For pipe repair, replacement, and repipe work, see our pipes and lines services. Our full plumbing team is available when you need us.