PNW Winter Is Coming: What Your Home Needs Before the Cold Hits
Pacific Northwest winters don't always bring dramatic snowstorms, but rain, wind, freezing temperatures and power outages can still do plenty of damage to a home.
The good news is that some of the most useful winter preparation is pretty simple. A few checks now can help prevent water damage, frozen pipes, wasted energy and an expensive surprise later in the season.
1. Start with water. Around here, it's usually the bigger threat.
Before the heavy rain really settles in, clean leaves and debris from gutters and make sure your downspouts are actually carrying water away from the house.
Take a walk around the property after a good rain. Is water pooling next to the foundation? Are any downspouts dumping directly beside the house?
The EPA recommends keeping gutters and downspouts clear and directing runoff away from the foundation. It also recommends correcting areas where the ground directs water back toward the home. (US EPA)
If you have a crawlspace, this is also a good time to peek underneath. Look for unexpected moisture, standing water, displaced insulation, plumbing concerns or damage to the vapor barrier.
2. Protect your pipes before the first freeze
Disconnect garden hoses and protect vulnerable exterior faucets.
Pay particular attention to plumbing located in crawlspaces, attics, garages, exterior walls and other unheated areas. Washington State Department of Health specifically recommends wrapping or insulating pipes near cold exterior walls and in attics and crawlspaces before freezing weather arrives. (Washington State Department of Health)
And one of the easiest things you can do costs nothing:
Know where your main water shutoff is.
If a pipe ever breaks, knowing how to stop the water quickly can matter just as much as preventing the freeze in the first place.
3. Find the places you're accidentally heating the outdoors
If you can feel cold air coming through a door or around a window, your heating system is working to replace that lost heat.
Weatherstripping and caulking can be inexpensive fixes for some of those obvious leaks. The U.S. Department of Energy identifies air sealing as one of the more cost-effective ways to improve a home's comfort and energy efficiency, and specifically recommends caulking and weatherstripping for appropriate gaps around doors and windows. (The Department of Energy's Energy.gov)
But don't automatically assume old windows are the biggest problem. Attics, crawlspaces, ducts and other hidden areas can also be significant sources of heat loss.
If your energy bills seem unusually high, a professional home-energy assessment may be more useful than guessing where to spend money.
4. Give your heating system some attention now
Check or replace your HVAC filter if your system uses one, and make sure your heating equipment isn't surrounded by stored items or debris.
If maintenance is overdue, dealing with it before the coldest weather arrives is generally a lot more convenient than discovering a problem when everyone else is calling for emergency service.
If you use a fireplace or wood stove, make sure it's ready to operate safely before putting it back into regular use. Washington DOH specifically recommends confirming that fireplaces function properly as part of winter-storm preparation. (Washington State Department of Health)
This is also an easy time to test your smoke and carbon-monoxide alarms.
5. Prepare for the power to go out
A Western Washington windstorm can turn a perfectly normal evening into a flashlight hunt very quickly.
Keep basic emergency supplies accessible, including flashlights, batteries, blankets, necessary medications and a way to keep phones charged.
And if you own a generator, please remember this one: never operate it inside the house, garage or carport. Washington DOH specifically warns against these locations because of carbon-monoxide danger. (Washington State Department of Health)
You don't need a bunker full of supplies. You just don't want to be looking for batteries in the dark.
Manufactured Homes: A Few Extra Things to Check
Manufactured homes have some winterization considerations that are easy to overlook because so much of the home's infrastructure may be underneath it.
Look underneath the home
If it's safely accessible, check for damage to the home's underbelly, exposed or displaced insulation, vulnerable water lines and obvious duct issues.
The U.S. Department of Energy actually maintains weatherization guidance specifically for manufactured homes, including procedures for insulating the manufactured-home belly, sidewalls and other areas. (The Department of Energy's Energy.gov)
If you see torn belly material, hanging insulation or damaged ductwork, don't ignore it just because it's out of sight.
Inspect the skirting
Look for missing, damaged or loose sections before winter storms arrive. Openings can expose plumbing, ductwork and insulation beneath the home to more severe weather.
Be careful about simply sealing every opening, however. Manufactured homes and their foundations or enclosures may have specific ventilation requirements.
Pay extra attention to exposed plumbing
Water lines beneath a manufactured home can be particularly vulnerable to freezing.
If your home uses approved heat cable or another pipe-freeze protection system, inspect it according to the manufacturer's instructions before you actually need it. Damaged electrical components should be repaired or replaced properly rather than improvised.
Watch where the rain goes
This one is especially important in the PNW.
HUD's manufactured-home installation standards require sites to be graded, sloped or otherwise designed so water drains away from the manufactured home, rather than accumulating beneath it. (HUD)
If you have a newer home on a lot that hasn't been fully landscaped or graded yet, pay close attention during the first few heavy rains. Where the water naturally goes can tell you a lot.
Before You Spend Thousands, Check for Free Help
This is the part I especially want homeowners to know about.
Washington has publicly funded weatherization programs, and some local utilities also offer incentives. Depending on household income, location, heating source and other eligibility requirements, homeowners may qualify for free weatherization work or rebates that reduce the cost of improvements.
KING COUNTY
Outside Seattle: King County Housing Authority's Weatherization Program serves qualifying low-income homeowners and renters throughout King County outside Seattle. The program includes single-family and mobile homes, and common improvements can include insulation, ventilation, furnace repair and air sealing.
KCHA notes that applications remain open, although households may be placed on a waitlist depending on funding and contractor capacity. (King County Housing Authority)
Seattle: The City of Seattle's HomeWise Weatherization Program provides free energy-efficiency improvements to eligible households. Depending on the home, work may include insulation, duct and air sealing, furnace repair or replacement, ventilation improvements and certain heat-pump installations. (Seattle.gov)
PIERCE COUNTY
Pierce County's Home Weatherization Program serves income-qualified households outside Tacoma city limits.
Potential services include a home assessment, attic/floor/wall/duct insulation, air sealing, furnace repairs, carbon-monoxide detectors and other energy-conservation measures. Tacoma residents are directed to separate assistance resources. (Pierce County)
SNOHOMISH COUNTY
Snohomish County operates a weatherization program that provides free home-energy improvements to qualified low-income households. (Snohomish County)
And here's one that may be useful even for homeowners who don't qualify for free weatherization:
Snohomish PUD currently offers weatherization rebates for qualifying electrically heated homes, including single-family and manufactured homes. Current incentives include qualifying insulation, duct-sealing and window improvements. (Snohomish County PUD)
MASON COUNTY
The Community Action Council of Lewis, Mason & Thurston Counties provides weatherization services funded through federal, state and utility programs. The organization says qualifying weatherization services are delivered free of charge. (CACLMT)
There is also energy-bill assistance for qualifying households. For Mason County, enrollment for the 2026-2027 Energy Assistance program begins October 1, 2026. (CACLMT)
NOT IN ONE OF THESE COUNTIES?
Washington State Department of Commerce maintains the statewide Weatherization Program and a county-by-county list of local agencies.
The program can provide qualifying Washington homeowners and renters with energy-efficiency improvements such as insulation, weatherstripping, air sealing and ventilation. Eligibility is income-based and your local agency makes the final determination. (Washington State Department of Commerce)
One Last Thought
Winterizing a house isn't about preparing for some once-in-a-century storm.
It's catching the little things before they become big things.
A clogged gutter, an exposed pipe, a draft you've ignored or water pooling next to the foundation may not seem urgent on a mild September afternoon. They feel very different during a freezing January night.
And before spending a lot of money on an energy-efficiency project, check the programs above. You might be eligible for help you didn't know existed.
If you run into a home-related question and aren't sure what the next step should be, feel free to reach out. I'm always happy to help you sort through the options or point you toward the right resource. joana@joanaevans.com
Sources: Washington State Department of Health; U.S. Department of Energy; U.S. Environmental Protection Agency; U.S. Department of Housing and Urban Development; Washington State Department of Commerce; King County Housing Authority; City of Seattle Office of Housing; Pierce County Human Services; Snohomish County; Snohomish PUD; and Community Action Council of Lewis, Mason & Thurston Counties.
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