Roof Repair in Sebastopol - Free Inspection, Itemized Written Quote

Fast, Reliable Roof Repair Across Sebastopol

Roof repair in Sebastopol usually runs $350 – $1,150 for the most common jobs: replacing torn shingles, resealing flashing, patching a valley leak, or resetting a vent boot. Most repairs take our crews between two and six hours on site, and every job starts with a written price before we climb a ladder. If you’ve got water staining on a ceiling, missing shingles after a wind storm, or moss working its way under the roof line, call us at (743) 200-8347. We know what Sebastopol roofs go through and we’ll tell you straight what needs fixing, what it costs, and how long it’ll take.

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Why Mercer Roofing Is Sebastopol’s Preferred Roof Repair Company

Three things matter when you’re standing at the door deciding whether to let a roofer in. You want to know who’s coming, you want the price in writing, and you want the fix to hold. We built our process around those three things because we know the worry of opening your home to a stranger is real, and for a lot of Sebastopol homeowners it’s the reason a repair waits too long. Before any of our technicians arrive, you get their name and photo sent to you. At the door, they hand over a photo ID badge. Every one of our technicians is background-checked and identity-verified under the Threshold Standard. No guesswork about who’s walking up your driveway.

The same goes for price. We put the scope and dollar amount in writing before any work starts. A one-page quote, a line-item breakdown, and a repair plan in plain English. If you live off Bodega Highway, out near the Laguna de Santa Rosa, or in the older neighborhoods around downtown, you get the same written price, the same written guarantee, and the same call-anytime phone line. (743) 200-8347 is answered by a live person, 24/7. Not a voicemail tree. Not a call-back form.

Sebastopol’s older homes need a roofer who treats hidden damage as part of the job, not an excuse to inflate it. More on that below.

Metal Roof Repair in Sebastopol

Metal roof repair in Sebastopol typically costs $400 – $1,400, with the higher end reserved for corroded panel replacement, structural fastener work, or repairs on commercial and agricultural buildings. Standing-seam and corrugated metal roofs are common on the town’s barns, carriage houses, and the occasional farmhouse addition, and they present their own failure modes here. Our Roof Repair team sees loose gasketed fasteners from thermal movement, seam separation at panel overlaps, rust-through at the eaves where fog drip keeps panels wet, and failed transition flashing where metal meets shingle at dormers and additions.

Seam and Panel Repair

When a metal seam opens or a panel punctures, the leak usually announces itself as a stain at the roof’s lowest point – often far from the actual hole. We trace the water path, not just the stain, because water travels the purlins and panel ribs before it drops onto your ceiling. A proper seam repair means cleaning the lap, testing the existing sealant, and mechanically re-fastening before resealing.

Flashing and Fastener Restoration

Sebastopol’s damp air accelerates fastener corrosion, especially on roofs within a half-mile of the Laguna de Santa Rosa or under dense redwood cover. We replace rusted neoprene-washered screws, reseat panels that have worked loose, and rebuild the flashing at ridges, valleys, and sidewalls. For homes with north-facing metal runs that stay shaded all winter, we’ll often recommend upgrading to stainless-steel fasteners on the repaired sections. It’s a small upcharge that doubles the life of the fix here.

Commercial Roof Repair in Sebastopol

Commercial roof repair in Sebastopol runs $800 – $3,000 for most flat and low-slope buildings, including repair of TPO or modified bitumen membranes, drain and scupper resealing, and rebuilt flashing at penetrations. Smaller shops and offices around downtown, the warehouses off Sebastopol Avenue, and the agricultural buildings scattered through the orchard country all sit under flat or near-flat roofs that pool water in our wet season. A two-inch sag becomes a pond, and a pond becomes a leak by February. We find the membrane breach, cut back the saturated insulation, and weld or adhere a proper patch, not a smear of cold-applied goop.

Flat Roof Patch and Drain Repair

Flat roof patch work is the most common commercial call we get in Sebastopol between November and March. The job starts with finding the actual breach, which is sometimes fifteen feet from the visible ceiling stain. We check every lap seam around the wet insulation, test the membrane’s adhesion, and rebuild the repair in layers, stripping away wet material down to dry decking or insulation. Drain repair usually accompanies the patch, because a clogged or cracked drain is often why water sat there in the first place.

Roof Edge and Parapet Flashing

Parapet and edge flashing on commercial buildings fails at the metal-to-membrane transition, especially where wind-driven rain hits the building’s west face all winter. We repair and re-flash those transitions with new termination bar, sealant, and counter-flashing, and verify the membrane is still bonded underneath. On older commercial buildings with original wood blocking at the parapet, we sometimes find rot that has to be cut out and replaced before the new flashing goes down.

Trusted Brands We Service in Sebastopol

We repair and install shingles from GAF, CertainTeed, Atlas, and the other major manufacturer-recognized lines. That matters because the shingles have to match what’s already on the roof, and repair work done with the wrong manufacturer’s product can void the original warranty. We keep common GAF and CertainTeed colors stocked with our Bay Area warehouse, so color matching on a typical Sebastopol repair is fast, not a two-week wait. For metal roofs, we work with the existing panel profile and match gauge and finish as closely as the original installation allows.

Common Roof Repair Problems We See in Sebastopol Homes

Drive through the older neighborhoods around downtown Sebastopol, the streets off Bodega Avenue, or the rural parcels out toward Graton, and you’ll see the same pattern on roof after roof. Here’s what we find most often when a homeowner calls us out:

• Moss and lichen at the shingle’s edge, not just the surface. The Petaluma Gap keeps roofs damp for weeks at a time, and the legacy orchard canopy and redwood shade hold what the fog leaves behind. Once growth pushes under a shingle’s edge, it pries the seal and lifts the tab, letting water wick toward the underlayment. Left alone for a season, that’s a leak.
• Failed underlayment and soft decking under what look like fine shingles. On Sebastopol’s 80-to-110-year-old bungalows, it’s common to peel back a shingle and find the layer beneath has turned to a soft, dark sponge. Water got in years ago and never dried. Fixing the shingle alone doesn’t stop the rot, and that’s what the cheapest estimates often miss.
• Knob-and-tube wiring or undersized attic framing discovered during a repair. Older Craftsman and farmhouse attics often still carry original wiring, and a roof repair that opens the decking or valleys sometimes requires bringing that wiring or framing up to code. It’s not a reason to panic and it’s not a reason to skip the repair. It’s a reason to have a roofer who walks you through it in writing.
• Failed flashing at valleys, dormers, and chimney transitions. The mild, wet climate means the old galvanized flashing used on mid-century Sebastopol homes is often rusted through at the bend points by year forty. A valley leaking usually shows up as a stain on the interior sloped ceiling right under the valley line. Repairing just the shingle while leaving the rotted flashing is the most common failure we see in other contractors’ work.

Pricing for Roof Repair in Sebastopol, CA

We Also Serve Cities Near Sebastopol

Mercer Roofing crews work throughout Sonoma County. If your home is in Sebastopol proper, the hills outside Cotati, downtown Rohnert Park, Santa Rosa, or one of the smaller roads running toward Windsor, we’ll send the same background-checked, photo-badged technician with the same written price and written guarantee. Dispatch and scheduling come from our Bay Area office, and the work is done locally by the crew that serves Sebastopol weekly.

FAQs About Roof Repair in Sebastopol