Why Michigan Pipes Freeze
Water expands roughly 9 percent when it freezes. Inside a closed plumbing system, that expansion creates enormous pressure — often more than copper or PEX can withstand. The result is a crack or split that may not leak immediately, but releases a flood the moment the ice thaws.
Michigan's climate is uniquely punishing for plumbing. Long stretches of single-digit and sub-zero temperatures, combined with older housing stock across Genesee, Lapeer, Shiawassee, Saginaw, and Oakland Counties, mean that pipes routed through unheated crawl spaces, exterior walls, attics, and unconditioned garages are at constant risk through January and February.
The Most Vulnerable Pipes in Your Home
As home inspectors, we see the same problem areas come up over and over again. The pipes most likely to freeze include:
- Hose bibs and outdoor spigots that were not winterized in the fall
- Pipes in exterior walls, especially on the north and west sides of the house
- Plumbing in unheated basements, crawl spaces, and attics
- Lines running through cabinets on exterior walls (kitchen and bathroom sinks)
- Garage plumbing, including utility sinks and water softener lines
- Vacant rental properties or seasonal homes left at low thermostat settings
If your home has any of these conditions, you are working with a known risk every winter — not bad luck.
Prevention Steps Before the Deep Freeze
The best frozen pipe defense is preparation done in the fall, but most steps can still be taken once cold weather hits.
Insulate Vulnerable Pipes
Foam pipe sleeves are inexpensive, easy to install, and dramatically reduce freeze risk. Wrap any exposed plumbing in basements, crawl spaces, and unheated areas. Pay special attention to elbows and joints, where insulation often gaps.
Seal Air Leaks
Cold air infiltration is the real enemy. Caulk and seal openings around dryer vents, sill plates, rim joists, electrical penetrations, and anywhere outside air can reach plumbing. A small draft on a copper line can drop the pipe temperature 20 degrees below room temperature.
Disconnect and Drain Hoses
Garden hoses left attached to outdoor spigots are a leading cause of burst pipes inside the wall. Disconnect every hose, drain it, and store it indoors. If your home does not have frost-free hose bibs, shut off the interior valve and open the outdoor spigot to drain the line.
Open Cabinet Doors
On the coldest nights, open the cabinet doors under sinks on exterior walls. This lets warm room air circulate around the plumbing — a small change that prevents many freeze events.
Let Faucets Drip
When wind chills drop well below zero, allow a slow trickle of cold water from the faucet farthest from your main shutoff. Moving water is much harder to freeze, and the trickle relieves pressure if ice does form.
Maintain Heat Everywhere
Never set your thermostat below 55°F, even if you are traveling. Make sure heating vents in every room are open and unobstructed, including guest rooms, bathrooms, and basements.
What to Do if a Pipe Freezes
If you turn on a faucet on a cold morning and only a trickle comes out, assume a pipe is frozen and act immediately:
- Keep the faucet open. As ice melts, water and steam need somewhere to go.
- Apply gentle heat to the suspected frozen section using a hair dryer, heating pad, or space heater. Never use an open flame, propane torch, or charcoal stove.
- Work from the faucet back toward the frozen area so melting water can escape.
- Check other faucets. If one pipe froze, others in similar locations probably did too.
- Know where your main shutoff is. If you discover a burst pipe, you need to stop the water in seconds — not minutes.
When to Call a Professional
Some freeze situations are beyond DIY. Call a licensed plumber immediately if you cannot locate the frozen section, the pipe is inside a finished wall, you find any sign of leaking or wall staining, or the affected line serves a critical fixture like a furnace or water heater. A professional can safely thaw and assess hidden damage before it turns into a flood.
How a Home Inspection Helps
A thorough home inspection identifies the conditions that make freeze damage likely long before winter arrives. At Mike's Complete Home Inspection, our home inspection in Flint, MI looks for missing pipe insulation, uninsulated rim joists, cold-air infiltration in mechanical rooms, and plumbing routed through unconditioned spaces — and our crawlspace inspection service reaches the tight, unfinished spaces where freeze damage usually starts. We also check that shutoff valves work, that hose bibs are frost-free or properly winterized, and that the home's heating system can keep up with Michigan's coldest nights.
If you are buying a home, planning to leave for an extended trip, or simply want a professional set of eyes on a property you have owned for years, visit our contact page to schedule an inspection with Mike's Complete Home Inspection. A few hours of preparation today can save tens of thousands of dollars in water damage tomorrow.