The short answer
Why Unused Pipes Still Freeze
Even if you haven't turned on a faucet or flushed a toilet, the water inside the pipe remains. When temperatures drop below freezing, that standing water can turn to ice. The expansion of ice exerts force on the pipe walls from the inside, which can cause the pipe to crack or split.
Pipes in unheated crawl spaces, attics, garages, or along exterior walls are especially vulnerable. In a mild marine climate with wet winters, freezing events are less common but still possible. A sudden cold snap can catch you off guard, especially if you don't use that particular pipe regularly.
Signs of a Frozen Pipe
You might notice a lack of water flow when you turn on a faucet. The pipe may feel cold to the touch, and frost can form on the exterior. A musty smell or slight dampness on walls or floors could indicate a slow leak from a crack that hasn't thawed fully.
Listen for unusual sounds like creaking or popping from the walls, which can happen as ice expands. If you suspect a freeze, act quickly. Turn off the main water supply to prevent a larger leak if the pipe bursts during thaw.
- No water flows when you open a faucet
- Pipe feels icy or has visible frost
- Damp spots or water stains on walls or ceilings
- Unusual noises from pipes when water is turned on
- A drop in water pressure throughout the house
What to Do If a Pipe Bursts
If a pipe bursts, shut off the main water valve right away. This stops the flow and limits water damage. Then, open all faucets to drain the system and relieve pressure. Avoid using electrical devices near standing water.
After the water is off, you can begin cleanup and drying. Remove any standing water with towels or a wet vacuum. Use fans and dehumidifiers to dry out the area, as lingering moisture can lead to mold growth. If the damage is extensive, local water damage pros can handle extraction and drying.
Preventing Future Freezes
Insulate pipes in unheated areas with foam sleeves or heat tape. Keep garage doors closed and open cabinet doors under sinks to allow warm air to circulate. During extreme cold, let a trickle of water run from faucets, even if you don't normally use them.
If you live in Redmond, keep your shutoff valve location written down so you can act fast in an emergency. Also, consider draining outdoor pipes and sprinkler systems before winter. A little preparation can save you from a messy cleanup later.
When to Call the Pros
If a pipe bursts, the resulting water damage can be significant, especially if it goes unnoticed for hours. Water can soak into drywall, flooring, and insulation, causing structural issues and mold. A professional water damage inspection can identify hidden moisture and prevent future problems.
Local water damage pros can assess the extent of the damage and recommend appropriate steps. They often provide services like structural drying and dehumidification to thoroughly dry affected areas. If you have insurance, check your policy to see what's covered. Policies vary, and your insurer decides what is covered.
- Water damage inspection to find hidden moisture
- Structural drying and dehumidification to prevent mold
- Drywall and flooring repair after cleanup
- Leak detection to locate the source of the problem
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (425) 407-5186Frequently asked questions
How long does it take for a pipe to freeze?
It depends on the temperature, pipe material, and insulation. In extreme cold, pipes can freeze in a few hours. Uninsulated pipes in unheated areas are most at risk. If you suspect freezing, act quickly to prevent a burst.
Can a frozen pipe burst even after it thaws?
Yes, a pipe can crack during freezing, but the leak may not appear until the ice melts. This is why you might not notice a problem until water starts flowing again. Check for dampness and listen for drips after a thaw.
Should I leave my faucets dripping during a freeze?
Yes, letting a trickle of water run through pipes can help prevent freezing. Moving water is less likely to freeze. This is especially helpful for pipes in cold areas. It's a simple step that can reduce the risk of a burst.