Autumn is when a roof’s small weaknesses start to matter. All summer, a lifted shingle or a hairline crack in old sealant can sit unnoticed because nothing is testing it. Once steady rain returns, especially in wet regions like the Pacific Northwest where yearly rainfall runs well past 35 inches, every gap gets probed day after day. Water also rarely drips straight down. It travels along rafters and sheathing before showing up as a ceiling stain, often several feet from where it actually got in.
Most fall roof problems give warning signs well before they become interior damage, and many can be spotted from the ground, the gutter line, or the attic. A focused inspection on a dry afternoon tells you whether the roof needs nothing, a small fix, or a bigger conversation. The checks below move roughly from the simplest to the ones that call for the most judgment.
For homeowners on Washington’s Eastside who would rather leave the ladder work to a specialist, C&A Roofing has been inspecting residential roofs out of Kirkland since 2009. Their team handles leak detection, flashing repair, storm damage and emergency tarping, along with full tear-off replacements, standing seam metal systems and VELUX skylight installs. Findings come with inspection photos, so you see the problem rather than take it on faith. Booking a free inspection before the heaviest storms is an easy way to start the wet season knowing exactly where your roof stands.
1. Follow the Water Off the Roof
A roof only works if water leaves it quickly. Clogged gutters let water back up under the first row of shingles and soak into fascia boards and soffits, which rot quietly from the inside. Fir needles and maple leaves are the usual culprits, and they pile up fastest in October.
After clearing the gutters, run a garden hose at the high end and watch what happens. Look for pooling in sagging sections, drips at seams, and downspouts that dump water right against the foundation. Gutter guards help, but needles often mat on top of them, so they still need a look each fall.
2. Trace Every Flashing Line
Shingles get the attention, but flashing is where most leaks begin. Walk the perimeter with binoculars and study every spot where the roof meets something else: chimneys, sidewalls, dormers, valleys and plumbing vents.
Rubber vent boots are a common weak point. UV exposure makes them brittle and they tend to crack around the pipe after about a decade. Around chimneys, look for lifted step flashing, rust, or thick beads of caulk smeared over joints. Caulk is a stopgap, not a repair, and heavy caulking usually means someone patched a flashing problem rather than solving it.
3. Read the Shingles and the Gutter Debris
What collects in your gutters says a lot about shingle health. A handful of dark, sandy granules is normal on a new roof. Steady piles on a roof older than ten years point to shingles losing their protective layer.
On the roof surface, look for curling or cupped edges, cracked tabs, bald patches and shingles that sit slightly raised. Summer heat should reseal the adhesive strips, so shingles that are still loose in fall are prime candidates for wind lift during the first storm. Architectural shingles generally outlast basic three-tab products by a wide margin, which matters when you weigh repairs against age.
4. Handle Moss Without Damaging the Roof
Moss is more than a cosmetic issue. It holds moisture against the shingles, lifts their edges as it grows, and spreads fastest on shaded, north-facing slopes. Left alone for a few seasons, it can shorten a roof’s life noticeably.
The instinct to pressure wash is the wrong one. High-pressure water strips granules and can force water underneath the shingles. A roof-safe moss treatment applied during a dry spell works better; the moss dies back over a few weeks and can then be brushed off gently. Zinc or copper strips near the ridge slow regrowth, and trimming overhanging branches lets the roof dry faster after rain. Recurring moss is also one of the main reasons homeowners in damp climates are moving to standing seam metal, which gives moss almost nothing to grip.
5. Spend Ten Minutes in the Attic
The attic shows problems the outside hides. Go up on a bright afternoon, switch off the light, and look for pinpoints of daylight around the ridge, vents and nail lines. Then check the underside of the sheathing with a flashlight for dark stains, water trails and soft or delaminated spots.
Also look at the nails poking through. Rust streaks or frost on them in colder months usually signal condensation, not a leak. That points to ventilation trouble, often soffit vents buried under insulation. Damp insulation, a musty smell or visible mold growth all deserve attention before winter traps more moisture up there.
6. Give Skylights Their Own Inspection
Skylights are large openings in the roof deck, and when they leak, the glass is rarely the cause. The problem is almost always the flashing or the curb framing around the unit. Check for debris packed against the uphill side, cracked seals, and staining on the interior drywall well.
It helps to know the difference between condensation and a leak. Droplets spread evenly across the inside of the glass on cold mornings usually mean humidity. Fogging between the panes means a failed seal. Water appearing only during rain, especially at the corners, points to flashing. Older skylights with site-built curbs or self-flashing designs are good candidates for replacement, and the smartest time to do it is alongside a re-roof.
7. Make the Repair or Replace Call Early
Once you have gathered the evidence, the decision usually comes down to age and spread. A roof under 15 years old with one localized issue is typically a repair job. A roof past 20 years with multiple leaks, widespread granule loss or soft decking is usually better replaced than patched repeatedly.
Timing matters here. Shingles need mild temperatures to seal properly, and reputable crews book up fast once the storms begin. If replacement is on the table, it is also worth comparing materials: standing seam metal costs roughly two to three times as much upfront as asphalt but can last 50 years or more.
Whatever you decide, take dated photos of the roof now. They create a baseline if a storm causes damage later, which makes insurance claims far simpler, since most policies cover sudden storm damage but not gradual wear. Knowing who you would call for emergency tarping, before you need it, rounds out a roof that is genuinely ready for the wet months ahead.
