Spring Roof Inspection Checklist for Sonoma County Homeowners

Spring Roof Inspection Checklist for Sonoma County Homeowners

Spring is the most important month of the year for your roof. Winter rains have just stopped, fire season hasn't started, and any damage hiding under wet shingles is finally visible in dry conditions. The work you do — or skip — between April and June determines whether your roof is ready for the next two demanding seasons.

This checklist is built specifically for Sonoma County homes: heavy winter rainfall, summer fire risk, and the wide diurnal temperature swings between Cotati and Healdsburg that wear roofs faster than a coastal climate would.

Before you climb a ladder

Most of this inspection can be done from the ground with a pair of binoculars. Don't get on the roof unless you're comfortable with ladders, the roof slope is moderate, and the surface is fully dry. If your roof is steeper than a 6:12 pitch or higher than a single story, hire a pro. The injury risk on a residential roof is real, and most insurance policies don't cover homeowner falls.

Section 1 — Ground-level visual scan

Walk the perimeter of the house once with binoculars and look for:

• Missing, cracked, or curled shingles. Asphalt shingles installed in the early 2010s are now 12–14 years into a 25-year rated lifespan and showing edge curl in Sonoma's UV exposure. A few curled shingles aren't an emergency, but a row of them along the south- or west-facing slopes signals you're entering the back half of the roof's life.
• Shingle granules in gutters and downspout splash zones. A handful is normal. A pile is a warning sign that asphalt shingles are aging out.
• Sagging rooflines. Stand at each corner of the house and sight down the ridge. Any visible dip or wave indicates structural issues that are not a DIY fix.
• Dark streaks running down from the roof. In our climate these are usually algae (Gloeocapsa magma), which is cosmetic but worth treating before it spreads.
• Moss on the north- or east-facing slopes. Sonoma County's wet winters and tree cover make moss a real problem in older neighborhoods. Catch it early.

Section 2 — Gutters and drainage

Sonoma County winters dump 30+ inches of rain in a normal year. By April your gutters have moved a swimming pool's worth of water through them.

• Clear all debris. Pine needles, oak leaves, and tree pollen create dams that back water under shingles.
• Check downspout discharge. Water should be exiting at least 4 feet from the foundation. Splash blocks and downspout extensions get knocked out of place over winter.
• Look for sag or pulled fasteners. A gutter that has separated from the fascia even slightly will let water run behind it during the next big rain.
• Inspect fascia and soffit paint. Bubbling, peeling, or staining is a tell that water has been getting behind the gutter.

Section 3 — Flashing and penetrations

Flashing (the metal that seals roof transitions) and penetrations (vents, pipes, skylights) are where roofs leak first. From the ground or a safe ladder position:

• Plumbing vent boots. The rubber gasket around plumbing vents cracks in 8–12 years in our UV climate. If you can see daylight through the boot, it's leaking already even if you haven't noticed inside.
• Skylight perimeters. Look for caulk failure or visible rust streaks.
• Chimney flashing. The step flashing along a chimney is a chronic leak source. Watch for separation, rust, or tar patches that signal previous emergency repairs.
• Valley flashing. The valleys where two roof slopes meet take the most water of any part of the roof. Check for granular wear, exposed metal, or organic debris packed in.

Section 4 — Attic check (the most useful 15 minutes)

The single most diagnostic thing you can do is poke your head into the attic with a flashlight on a sunny morning. Look for:

• Daylight through the roof deck. Anywhere you can see light from below means you can see water from above.
• Water staining on rafters or insulation. Even old, dry stains tell you where leaks have happened. Compare to last year — new stains mean active leaks.
• Sagging insulation, especially in valleys. Wet insulation compresses and stays compressed.
• Rodent or bird activity. Sonoma roofs see rats, squirrels, and roof rats chewing through soffit vents. Spring is the time to seal entry points before the summer pest cycle.

Section 5 — Defensible-space and fire-season prep

This is the section a homeowner outside California wouldn't have on the list, and it's the one that matters most for Sonoma County.

• Clear leaves and pine needles from valleys, behind chimneys, and around skylights. Embers landing on accumulated debris are how roofs ignite.
• Trim tree branches back at least 10 feet from the roof line. Eucalyptus, oak, and Doug fir branches over a roof are both ember catchers and abrasion hazards.
• Inspect attic vents for ember screens. Older homes built before 2008 often have unscreened vents. Adding 1/8" wire mesh is one of the cheapest, highest-impact fire mitigations available.
• Check the gutter line for combustible debris. A clean gutter is also fire-defensible space.

What to fix yourself, what to call a pro for

DIY-appropriate:

• Gutter cleaning and downspout adjustment
• Vent screen replacement
• Trimming tree branches well clear of the roof
• Re-caulking minor flashing gaps with appropriate roofing sealant

Call a roofing professional for:

• Replacing more than a couple of shingles
• Any flashing replacement around chimneys or skylights
• Anything you saw from the attic — daylight, fresh staining, sagging deck
• Sagging rooflines or any structural concern
• Roofs over 20 years old where you found multiple issues — at that age, a full inspection and lifecycle conversation makes more sense than a piecemeal repair

When to schedule the inspection

The window is April through June. After the rains, before fire season, and while local roofing contractors still have schedule capacity. Wait until July and you're competing with everyone whose summer started with an unwelcome surprise.

If you find more than two or three items on this checklist that need attention, schedule a professional inspection. A 30-minute inspection from a local roofer typically catches 90% of what a homeowner check missed — and tells you whether you have a roof with five good years left or a roof that should be on the replacement plan.

Either answer is better than guessing through another winter.