As the vibrant greens of summer give way to the fiery reds and oranges of fall, homeowners in the Pacific Northwest know that the rain—and lots of it—is just around the corner. With our region’s famously wet autumns and moss-prone climate, roof maintenance is not just smart—it’s essential.
Here’s your fall roof maintenance guide to help you stay ahead of the weather.
Why Fall Roof Maintenance Is Critical in the PNW
The Pacific Northwest sees some of the highest annual rainfall totals in the U.S. Mix that with dense tree cover, high humidity, and falling debris, and you’ve got the perfect recipe for:
- Clogged gutters and downspouts
- Water pooling on roofs
- Moss and algae growth
- Leaks and water damage inside the home
- Ice dams (yes, even in the PNW’s milder winters)
A little prevention now can save you thousands in repairs down the road.
Your Fall Roof Maintenance Checklist
- Clean the Gutters
Why it matters: Leaves, pine needles, and twigs pile up fast in PNW gutters. When left unchecked, clogged gutters overflow, sending water under shingles and into your fascia and walls.
What to do:
- Scoop out leaves and debris
- Flush downspouts with water
- Install gutter guards if you’re in a wooded area
- Inspect the Roof Surface
Why it matters: Damaged or missing shingles can allow water to seep into the home. Moss and algae can degrade shingles and trap moisture.
What to do:
- Look for cracked, curled, or missing shingles
- Check for moss, algae, or lichen growth
- Use a moss treatment (look for zinc-based or eco-friendly products)
- Don’t pressure wash—it can damage shingles
- Check for Flashing Damage
Why it matters: Flashing seals the edges of your roof and protects against leaks around chimneys, skylights, and vents. If it’s corroded or pulled away, water will find its way in.
What to do:
- Inspect flashing around all roof penetrations
- Look for rust, gaps, or loose sections
- Reseal or replace as needed
- Trim Overhanging Branches
Why it matters: Trees shed leaves and branches in fall storms. Overhanging limbs can damage shingles, scratch roofing material, and drop organic debris that promotes moss.
What to do:
- Trim branches at least 6 feet away from the roof
- Consider professional help for tall or unstable trees
- Look Inside the Attic
Why it matters: Your attic can give you early signs of roof trouble—like leaks, mold, or poor ventilation.
What to do:
- Check for water stains or damp insulation
- Look for mold growth or musty smells
- Ensure soffit vents and attic fans are working properly
Bonus Tip: Prevent Moss Growth Proactively
The PNW’s damp, shady climate makes moss prevention a year-round concern. To stay ahead of the green menace:
- Install zinc or copper strips near the roof ridge
- Use a gentle moss killer in early fall (before heavy rains)
- Keep roof debris-free to prevent moisture retention
When to Call a Pro
If you’re unsure about your roof’s condition—or if it’s steep, high, or hard to access—it’s worth investing in a professional inspection. Get a fall tune-up, which can include:
- Full roof inspection
- Gutter cleaning
- Minor repairs
- Moss treatment
In the Pacific Northwest, your roof is your first defense against months of wind, rain, and chilly dampness. A little attention in September or October can go a long way in protecting your home, extending the life of your roof, and avoiding costly water damage.
Your dry, cozy home will thank you.
Robert Gardner Roofing
in Seattle, WA has been the trusted roofing company in the greater Seattle area for over 20 years. Our team of expert roofers will arrive at your home or business with all the necessary materials and carefully set up for installation. We prepare everything offsite, in advance, so the job runs efficiently, creating a clean and safe job site! Contact them today for a FREE repair or roof replacement estimate; same-day estimates are possible based on availability. Have a question? Contact them online or call 206-498-0691.
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