Preparing Your Washington Home for Winter
Preparing Your Washington Home for Winter
Washington winters bring a unique mix of challenges—from heavy rain on the coast to freezing temperatures and snow in Eastern Washington and mountain communities. Here's your comprehensive winterization guide tailored to the Evergreen State.
When to Start: The Washington Timeline
- September-October: Schedule HVAC inspections (contractors book up fast)
- October-November: Complete exterior prep before the first freeze
- November: Final checks before sustained cold arrives
Western Washington rarely sees extended freezes, but when they hit (like the infamous 2021 ice storm), unprepared homes suffer the most damage.
Complete Winterization Checklist
Heating System Maintenance
Before the first cold snap:
- Schedule furnace/heat pump inspection ($80-$150 for tune-up)
- Replace air filters (do this monthly during heating season)
- Test thermostat—consider upgrading to a smart thermostat
- Bleed radiators if you have a boiler system
- Check pilot lights on gas appliances
- Inspect heat pump outdoor unit—clear debris within 2 feet
Heat pump owners (common in WA): Your system may struggle below 25°F. Know where your emergency heat setting is, and understand it costs 2-3x more to run.
Who to call: Licensed HVAC technician. In WA, HVAC contractors must hold a 06A Electrical specialty license or work under an 01 General Electrical contractor.
Preventing Frozen Pipes
Washington's freeze-thaw cycles are particularly brutal on pipes. Here's how to protect them:
High-risk areas in WA homes:
- Crawl spaces (extremely common in WA—most homes have them)
- Exterior walls, especially older homes without updated insulation
- Garages with water heaters or washing machine hookups
- Outdoor hose bibs
Prevention steps:
- Disconnect and drain garden hoses
- Install insulated covers on outdoor faucets ($3-$8 at any hardware store)
- Insulate exposed pipes in crawl spaces with foam pipe insulation
- Know your main water shutoff location (critical!)
- Leave cabinet doors open under sinks on exterior walls during freezes
- Let faucets drip during extreme cold (below 20°F)
Crawl space specific:
- Check vapor barrier for tears or gaps
- Ensure foundation vents are working—some WA homes benefit from closable vents
- Consider crawl space encapsulation for long-term protection
Who to call:
- Pipe insulation: Handyman or DIY
- Crawl space work: Licensed plumber or crawl space specialist
- If pipes freeze: Licensed plumber (WA requires 01 Plumbing license)
Roof Prep for Snow and Rain
Western Washington roofs battle constant rain; Eastern WA roofs face snow loads.
All Washington homes:
- Clean gutters and downspouts (critical—WA's trees drop massive leaf loads)
- Inspect roof for missing/damaged shingles
- Check flashing around chimneys, vents, and skylights
- Trim branches within 10 feet of roof
- Ensure downspouts direct water 6+ feet from foundation
Eastern WA and mountain communities:
- Check roof load capacity if you get heavy snow
- Consider roof rake for removing snow buildup
- Inspect for ice dam potential—look at attic insulation
- Clear valleys and low-slope areas after storms
Ice dams: If your roof develops ice dams, the problem is inadequate attic insulation/ventilation—not the roof itself. Address the cause, not just the symptom.
Who to call:
- Gutter cleaning: Handyman or gutter service ($100-$250 for typical home)
- Roof inspection: Licensed roofing contractor
- Ice dam prevention: Insulation contractor
Windows and Doors
- Check weatherstripping—replace if cracked or compressed
- Inspect caulking around window frames (inside and out)
- Consider window insulation film for single-pane windows
- Check door sweeps and thresholds
- Reverse ceiling fans to clockwise (pushes warm air down)
WA-specific note: Many older Seattle-area homes have original single-pane windows. Upgrading to double-pane dramatically reduces heating costs—and may qualify for utility rebates.
Exterior Drainage
WA's rain means drainage is everything:
- Grade soil away from foundation (6 inches drop over 10 feet)
- Clean French drains if you have them
- Check sump pump operation
- Inspect window wells for debris
- Ensure crawl space isn't collecting water
Emergency Supplies Every WA Home Should Have
Power outages happen. Be ready:
- Flashlights and batteries (or hand-crank lights)
- Battery-powered or hand-crank radio
- 3 days of water and non-perishable food
- Extra blankets and warm clothing
- Cash (ATMs don't work without power)
- Portable phone chargers
- First aid kit
- Manual can opener
If you have a generator: Never run it indoors or in a garage. Carbon monoxide kills quickly.
When to Call Which Contractor
| Issue | Who to Call | WA License to Verify |
|---|---|---|
| Furnace not heating | HVAC contractor | 06A Electrical |
| Heat pump issues | HVAC contractor | 06A Electrical |
| Frozen/burst pipes | Plumber | 01 Plumbing |
| Roof leak | Roofing contractor | General contractor |
| Gutter issues | Gutter service or handyman | N/A for minor work |
| Window replacement | Window installer | General contractor |
| Crawl space moisture | Crawl space specialist | General contractor |
| Insulation upgrade | Insulation contractor | 02 Insulation specialty |
Always verify licenses at: Washington L&I Contractor Search
Regional Considerations
Western Washington (Seattle, Tacoma, Olympia)
- Focus on rain management and moisture control
- Freezes are rare but devastating when they hit
- Moss on roofs is cosmetic but can trap moisture
Eastern Washington (Spokane, Tri-Cities, Wenatchee)
- Snow load is the primary concern
- Extended freezes require serious pipe protection
- Furnaces work harder—maintenance is critical
Mountain Communities (Snoqualmie, Leavenworth)
- Prepare for power outages lasting days
- Snow removal equipment is essential
- Roof snow loads can be dangerous
Cost Estimates for Common Winter Prep
| Service | Typical Cost |
|---|---|
| Furnace tune-up | $80-$150 |
| Gutter cleaning | $100-$250 |
| Pipe insulation (DIY) | $20-$50 |
| Crawl space inspection | $100-$300 |
| Roof inspection | $150-$400 |
| Weatherstripping replacement | $20-$100 (DIY) |
The Bottom Line
The best time to prepare for WA winter is before you need to. Contractors book up fast when the first freeze warning hits, and emergency rates are 2-3x normal pricing.
Start your winterization checklist in September, complete it by early November, and you'll sleep well knowing your home is ready for whatever Washington winter brings.
Need a contractor? Find licensed professionals in your area →