Wind-Driven Rain in Washington: How It Damages Homes (and What You Can Do to Prevent Costly Repairs)
If you own a home in Washington, you already know that rain is part of daily life. What many homeowners don’t realize, however, is that wind-driven rain is far more damaging than a typical rainfall — and it’s becoming increasingly common during seasonal storms.
Recently, we’ve seen several storms where heavy rain was paired with strong winds, pushing water into places it normally wouldn’t reach. This combination can quietly cause serious damage to homes if preventative steps aren’t taken.
What Is Wind-Driven Rain?
Wind-driven rain occurs when strong winds force rain horizontally or upward, allowing moisture to penetrate areas of your home that are usually protected. Unlike normal rain, wind-driven rain can:
• Push water behind siding
• Force moisture into window and door seams
• Enter roof edges and flashing
• Exploit small cracks in caulk or trim
Even well-built homes can be vulnerable when maintenance is overlooked.
Common Damage Caused by Wind-Driven Rain
In Western Washington, we frequently see damage from storms show up weeks or even months later. Common issues include:
• Water intrusion around windows and doors
• Rotting trim and siding
• Mold growth inside walls
• Ceiling stains and drywall damage
• Foundation moisture and crawlspace issues
The tricky part is that these problems often start small and remain hidden until repairs become expensive.
Why Washington Homes Are Especially Vulnerable
Homes in Washington face unique challenges:
• Frequent rainfall over long periods
• Coastal and Puget Sound wind exposure
• Older homes with aging materials
• Seasonal temperature changes that cause caulk to expand and contract
Over time, these conditions wear down exterior seals, making it easier for water to get inside.
How to Protect Your Home from Wind-Driven Rain
1. Inspect and Maintain Exterior Caulking
One of the most effective and affordable ways to protect your home is maintaining good exterior caulk.
Check caulking around:
• Windows and doors
• Siding joints
• Trim boards
• Vents and exterior penetrations
If caulk is cracked, peeling, or missing, it’s time to replace it. Use a high-quality, paintable exterior caulk designed for wet climates.
2. Pay Attention to Windows and Doors
Windows are a major entry point for wind-driven rain. Make sure:
• Window flashing is intact
• Seals are tight
• No gaps exist between frames and siding
If you notice moisture, fogging, or staining around windows, address it quickly before water reaches interior walls.
3. Keep Gutters and Downspouts Clear
Clogged gutters cause water to overflow and run down exterior walls — exactly what wind-driven rain needs to find entry points.
Make sure:
• Gutters are clear of debris
• Downspouts direct water away from the foundation
• Splash blocks or extensions are in place
4. Inspect Roof Edges and Flashing
Strong winds can push rain under shingles and into roof edges. Have your roof inspected regularly for:
• Loose or damaged shingles
• Compromised flashing
• Worn roof vents and seals
Small repairs now can prevent major water damage later.
5. Watch for Early Warning Signs Inside Your Home
Inside your home, keep an eye out for:
• Musty smells
• Discoloration on ceilings or walls
• Peeling paint near windows
• Unexpected humidity or condensation
These signs may indicate moisture intrusion that needs immediate attention.
Prevention Is Always Cheaper Than Repair
Water damage caused by wind-driven rain can quickly turn into mold remediation, structural repairs, or insurance claims. The good news is that regular maintenance and simple preventative measures — like proper caulking — can dramatically reduce your risk.
Taking time each year to inspect and maintain your home’s exterior can save thousands of dollars and protect your investment long-term.
Final Thoughts
Washington’s weather isn’t changing — but how prepared your home is can make all the difference. If you’re unsure whether your home is properly protected, a professional inspection can help identify vulnerabilities before the next storm hits.
As local real estate professionals, we see firsthand how moisture damage impacts home values and resale. Protecting your home now helps preserve its value for years to come.
