Storm Season in King County: Be Ready Before It Hits

Every fall and winter, the Pacific Northwest delivers powerful windstorms, heavy rain events, and occasional ice and snow. For homeowners in Issaquah, Sammamish, Bellevue, and across King County, a few hours of preparation can prevent thousands of dollars in storm damage. Here’s your comprehensive storm prep checklist from the team that restores homes after the worst storms hit.

Roof and Gutters: Your First Line of Defense

Inspect your roof. Look for missing, cracked, or curling shingles from the ground using binoculars, or hire a professional for a thorough inspection. Even one missing shingle can allow water intrusion during a heavy rain event. If your roof is showing signs of age, our roof repair and replacement guide covers when to repair versus replace.

Clean your gutters and downspouts. Clogged gutters cause water to back up under your roofline, overflow onto your foundation, and create ice dams in cold weather. Clean them at least twice a year — once in late spring and once in late fall after the leaves drop.

Check flashing and seals. Flashing around chimneys, vents, skylights, and wall-roof transitions is where most roof leaks originate. Look for gaps, rust, or lifted sections and have them repaired before the rain starts.

Trim overhanging branches. Dead or overhanging tree limbs are the number one cause of storm damage to roofs in King County. Trim branches that hang over your roof or within 10 feet of your home. For large trees, hire a certified arborist — improper cutting can make the tree more dangerous, not less.

Exterior and Drainage

Check your grading and drainage. The ground around your foundation should slope away from your home at a rate of at least 6 inches over the first 10 feet. Poor grading allows rainwater to pool against your foundation and seep into crawl spaces and basements. This is one of the most common causes of water damage in Eastside homes.

Extend downspouts. Downspouts should discharge water at least 4-6 feet away from your foundation. Add extensions or splash blocks if water is currently dumping right next to your home.

Inspect your siding and caulking. Check for cracked, loose, or missing siding panels. Inspect caulking around windows, doors, and utility penetrations. Failed caulking lets wind-driven rain penetrate your wall cavities — leading to hidden mold growth.

Secure outdoor items. Patio furniture, garbage cans, planters, trampolines, and decorations become projectiles in high winds. Secure them, store them, or bring them inside before a storm.

Test your sump pump. If your home has a sump pump, test it by pouring a bucket of water into the pit. It should activate immediately and pump the water out. Consider installing a battery backup — power outages during storms are common in King County, and that’s exactly when you need your sump pump most.

Windows and Doors

Check weather stripping. Worn or missing weather stripping around doors and windows lets wind-driven rain inside and increases heat loss. Replace any that’s cracked, compressed, or missing.

Inspect window seals. Look for foggy or condensation between double-pane windows — this indicates seal failure. Failed window seals won’t protect against wind-driven rain and should be replaced.

Secure storm windows. If your home has storm windows, make sure they’re properly latched. For older single-pane windows, consider installing storm windows or upgrading to double-pane for both energy efficiency and storm protection.

Interior Preparation

Know your water shutoff. In a pipe burst or flooding emergency, knowing where your main water shutoff valve is — and making sure it works — can save your home from catastrophic water damage. Test it at least once a year.

Check your attic. Look for signs of previous leaks (water stains, discoloration, mold), adequate insulation, and proper ventilation. A well-maintained attic prevents ice dams and catches roof leaks before they reach your living space.

Inspect your crawl space. Check for standing water, moisture on surfaces, vapor barrier condition, and any signs of mold. King County’s wet climate makes crawl space moisture management essential.

Review your insurance policy. Before storm season, review your homeowner’s insurance coverage. Know your deductible, understand what’s covered (and what’s excluded), and make sure your coverage limits reflect current rebuilding costs. Our insurance claims guide helps you understand the process before you need it.

Emergency Preparedness Kit

King County storms frequently cause power outages lasting hours to days. Keep these essentials ready: flashlights and extra batteries, portable phone chargers, first aid kit, three days of non-perishable food and water, battery-powered or hand-crank radio, warm blankets, and a list of important phone numbers including your insurance company and a trusted restoration contractor.

When Storm Damage Happens Despite Preparation

Even well-prepared homes can sustain storm damage. If your home is damaged during a storm, check out our detailed guides on storm damage restoration and emergency water damage response. The most important thing is to act quickly and call a professional before minor damage becomes a major problem.

Free Storm Damage Inspections

Prolific Design-Build and Restoration offers free storm damage inspections for homeowners in Issaquah, Sammamish, Bellevue, Renton, Redmond, Kirkland, and throughout King County. If you suspect storm damage — or want a professional assessment before storm season — call us at (425) 800-4775 or schedule your inspection online.

Black-owned and Latino-owned. Licensed and insured. Committed to protecting Eastside homes.

Related: Roof Repair & Replacement Guide | Fire Damage Restoration | High-Value Home Restoration