Pipes in unheated spaces
Crawl-space lines, garage runs and basement pipes near vents or doors freeze first. These are the easiest to protect with foam sleeves and weatherstripping.
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Frozen Pipe Water Damage in Portland: Before and After the Thaw
What to do about frozen pipes in Portland's mild climate, and how thaw leaks are dried when a pipe has already split.
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- Basements, roofs and old pipes
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Frozen Pipes
Frozen Pipe Water Damage: what it covers
Quick answer
A frozen pipe has not failed yet, but it may split as it thaws. Open the faucet slightly, warm the area gently and find the shutoff. If water appears, close the main and call. Portland Water Damage Restoration answers 24/7 and a crew is dispatched as fast as one is available.
Portland pipes are not built for ice. The winters are mild and wet, so builders and owners have mostly designed against rain rather than frost. Supply lines run through vented crawl spaces, along garage walls, up exterior walls and into unheated utility closets, all places that rarely freeze until the one winter they do. When a real cold snap arrives, those pipes have no margin.
The January 2024 storm made that visible. Nearly five days of ice and snow, four of them with temperatures that never rose above freezing, led Portland firefighters to log more than 1,000 potential water-emergency calls between the 13th and the 17th, mostly burst pipes. Reports tied the peak to the thaw. A pipe can hold ice for days without leaking, and then the ice melts and the crack opens.
This page is about the window between freezing and flooding, and about what comes after. Prevention and safe thawing are in the sections below. If the pipe has already split, the restoration work is the same as for any burst pipe: shut the water, extract, locate the wet cavities and dry.
- Service area
- Portland & Multnomah County
- Availability
- Phones answered 24/7, emergencies first
- Phone
- (833) 490-5225
Warning signs
Signs you need frozen pipe water damage
Do not use a torch, propane heater or any open flame on a frozen pipe, and do not leave a heater unattended on wet floors. If water is spraying, shut the main and phone (833) 490-5225.
- A faucet that runs as a thin trickle, or not at all, on a freezing morning
- Frost or a hard shell of ice visible on a pipe in a crawl space or garage
- A bulge or small split in an exposed pipe
- A hose bib that has frozen with the hose still attached
- Water stains appearing below an exterior wall after a night of hard frost
- A whistling or hissing sound as the pipe warms
- A sudden drop in water pressure at a fixture on an outside wall
- A water heater or boiler running without its usual hot-water supply
Our process
How our frozen pipe water damage visit works
Shut the water and find the location
If a pipe is frozen but not split, the main is closed in case it fails when the temperature rises. The technician or plumber locates the frozen section, often in an exterior wall or crawl space.
Thaw safely
Warm air from a hair dryer or heater moves along the pipe, starting nearest the faucet and moving toward the freeze. Open flames are never used near framing.
Check for splits
After the pipe thaws, the line is turned back on slowly while someone watches for leaks. A small split can spray when the pressure returns.
Extract and dry if water got out
Water is removed from floors and cavities. Moisture meters and a thermal camera locate wet insulation and drywall, which are cut and removed where needed.
Protect against the next freeze
Insulation on exposed runs and sealing of air gaps lower the odds of a repeat. A plumber can add or replace sections, and heat tape is another option.
Cost
How much does frozen pipe water damage cost in Portland?
A frozen pipe that never splits costs little to deal with. Once water escapes, the bill follows the same factors as any burst line. We print no dollar figures, because none we could source describes a Portland job.
| Job | Typical range | What it includes |
|---|---|---|
| Thawed, no leak | Usually a plumber's call-out | No restoration work if no water escaped |
| Split pipe, small release | Quoted on site | Extraction and drying of the affected cavity |
| Split pipe, long run | Quoted on site | Multiple floors and materials add scope |
Your price is confirmed on site, and written down, before work starts.
How do you thaw a frozen pipe without causing damage?
Open the faucet slightly, then warm the pipe gradually with a hair dryer or a heater placed safely, working from the faucet back toward the frozen section. Never use an open flame. If you can't find the freeze or the pipe is inside a wall, call a plumber.
Keep the main valve location in mind, because a pipe that has already split may start flowing as soon as the ice clears. Someone should be standing by the valve while the pipe thaws.
A faint trickle from a faucet is a good sign: it means water is moving past the ice. Keep the faucet slightly open until the pipe runs normally.
Why is the leak worse after the thaw than during the freeze?
Ice holds a split closed. While the pipe is frozen, little or nothing escapes. When the ice melts, the pipe fills and pressure returns, so a hairline split can turn into a steady spray. This is why damage often shows up when the weather warms, not when it turns cold.
That pattern appeared across Portland in January 2024, when calls peaked as pipes thawed. The practical lesson is to check after the cold, not just during it.
After a hard freeze, walk the crawl space or basement with a flashlight, listen for hissing, and look for drips. If you find one, shut the main before anything else.
How can you reduce the risk before the next freeze?
Insulate exposed pipes, seal drafts around crawl-space vents and utility penetrations, disconnect and drain hoses, and let faucets on exterior walls trickle during a hard freeze. Know where the main shutoff is. These steps cost little and have kept many pipes from failing in cold snaps.
A mild-winter city rarely thinks about this until the forecast turns. The simplest habit is to check the forecast each autumn, not when the cold arrives.
If you plan to travel in winter, ask someone to check the house, or keep the heat on and leave cabinet doors under sinks open.
What should you check after a hard freeze?
Walk the crawl space, garage and basement with a flashlight, listen for hissing or dripping, and check the ceilings below bathrooms and kitchens. Run each faucet briefly to confirm pressure. If any pipe is bulging, split or leaking, close the main and call before the weather warms further.
The first mild afternoon after a freeze is the moment to look. If you find a wet spot, photograph it before touching anything and note the time.
Remember outdoor fixtures. A frozen hose bib may leak inside the wall, where you cannot see it, and the first sign can be a damp spot on the inside of the exterior wall.
What about a vacant house, a rental or a vacation home?
An empty house is the worst place for a frozen pipe because nobody notices until the damage is large. Keep the heat on, shut off the main if the house will be empty for days, and arrange for someone to check it during a cold snap. Landlords and managers should have a plan before the forecast turns.
Apartments and condos add a complication: a split pipe in one unit can flow into units below, so the building association or manager needs to be told quickly. Water that crosses units makes responsibility harder to sort out.
If you manage a rental, note where each unit's shutoff is and tell tenants. A written winter checklist is a small effort compared with a multi-unit loss.
Options
Types and options for frozen pipe water damage
Pipes in exterior walls
A kitchen or bath sink on an outside wall can freeze even in a heated house, because insulation is thin behind the pipe. Opening the cabinet door lets room air reach the pipes.
Outdoor fixtures and irrigation
Hose bibs and irrigation backflow assemblies are exposed to air. A frozen bib can split inside the wall, and the leak shows only once the water is turned on again.
Multnomah County
Why frozen pipe water damage is different in Portland metro
Portland averages little freezing weather, so pipe protection tends to be an afterthought. The 2024 storm, which kept the city below freezing for several days, taught homeowners across the metro what a few cold days can do to exposed lines.
Houses on crawl spaces are particularly exposed, since foundation vents let in cold air. Many older Portland houses sit over vented crawl spaces with uninsulated supply lines in the joists.
The same cold reaches Vancouver, Camas and the eastern suburbs. Contractors on the Washington side register with the state Department of Labor & Industries, not Oregon's CCB, so the license check differs depending on which side of the Columbia you live on.
Because freezing is so uncommon here, the damage from a hard freeze often happens in places owners rarely look: the vented crawl space under a kitchen, the pipe run behind a garage wall, the line to an outdoor tap. A technician checks those places first because that is where the ice tends to form.
After the January 2024 storm, Portland firefighters logged more than 1,000 potential water-emergency calls over five days. That volume meant crews were stretched, which is a good reason to take freeze prevention seriously ahead of the next forecast.
Need frozen pipe water damage today?
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Where we work
Frozen Pipe Water Damage across Multnomah County
- Frozen Pipes in Portland
- Frozen Pipes in Beaverton
- Frozen Pipes in Lake Oswego
- Frozen Pipes in Marylhurst
- Frozen Pipes in Happy Valley
- Frozen Pipes in Vancouver
- Frozen Pipes in Milwaukie
- Frozen Pipes in Gladstone
- Frozen Pipes in Clackamas
- Frozen Pipes in West Linn
- Frozen Pipes in Tualatin
- Frozen Pipes in Fairview
- Frozen Pipes in Gresham
- Frozen Pipes in Tigard
- Frozen Pipes in Damascus
- Frozen Pipes in Hillsboro
- Frozen Pipes in Oregon City
- Frozen Pipes in Camas
- Frozen Pipes in Troutdale
- Frozen Pipes in Sherwood
- Frozen Pipes in Aloha
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Related
Related services
Burst Pipe Water Damage
Cleanup and drying after a supply line splits, whether from freezing, corrosion or a failed joint, in a Portland house.
Crawl Space Water Damage
Pumping, drying and documenting wet crawl spaces under Portland-area houses, including insulation, joists and vapor barriers.
Emergency Water Removal
Pumping and extraction for standing water in Portland basements, living areas and crawl spaces, followed by the drying plan.
Ceiling Water Damage
Dealing with stained, bulging or dripping ceilings in Portland houses and apartments, from roof leaks to upstairs plumbing.
Guides
Read before you book
What the January 2024 Freeze Taught Portland About Burst Pipes
During the January 2024 ice storm, Portland firefighters received more than 1,000 potential water-emergency calls between January 13 and 17, mostly burst pipes, with calls peaking as pipes thawed.
FAQ
Frozen Pipe Water Damage FAQs
Should I let faucets drip during a freeze?
A slight trickle on faucets served by exterior-wall or crawl-space pipes can keep water moving and relieve pressure. It is not a guarantee, but it helps. Keep cabinet doors open so room air reaches the pipes.
My pipe thawed and nothing leaked. Am I fine?
Probably, but check again over the next few hours. A small split may open as the pressure builds. Look at the pipe and the area beneath it, and be ready to close the main.
Can frozen pipes cause mold?
They can, indirectly. A leak that goes undetected inside a wall or crawl space can feed mold within days. Drying promptly and checking readings reduces the risk.
Is it safe to use a heat gun?
A hair dryer is safer, since a heat gun can scorch wood or melt plastic fittings. Keep it moving and never leave it running unattended.
Will insurance cover freeze damage?
Sudden freeze damage is often covered, but coverage depends on your policy and conditions. Your insurer decides. Photographs and invoices help.