Roof Repair in Sonoma - Written Price, Workmanship Warranty

Fast, Reliable Roof Repair Across Sonoma

Roof repair in Sonoma means dealing with two very different houses depending on where you stand. Downtown near the Plaza, you’re looking at 1890s Victorians with original wood shake and clay tile that the City’s design review board won’t let you replace with modern asphalt. Out in the hills around Moon Mountain Road or up toward Cavedale, you’re dealing with ranch homes from the 60s and 70s where Diablo wind events punish every weak flashing joint and ember can find a path through a rusted vent boot. Most repairs in Sonoma run between $380 and $1,650 depending on what’s failing. If water is already coming through, call (361) 320-9467 and we’ll get a crew scheduled.

Call (361) 320-9467

We handle Roof Repair the same way on every job: a written price before any work starts, a background-checked technician in uniform on your roof, and a one-year guarantee in writing. That’s the Garrison Standard, and it applies whether we’re patching a flat roof section in Boyes Hot Springs or re-flashing a chimney on a historic home off East Spain Street.

Why Brennan Roofing Is Sonoma’s Preferred Roof Repair Company

Homeowners around Sonoma call us because they want a roofer who answers the phone and stands behind the work. Our phones are answered by a live person around the clock. No voicemail, no automated system, no callback queue. When you call (361) 320-9467, a real person picks up.

Roof repair in Sonoma comes with a specific set of constraints that a generic roofing outfit won’t understand. The historic overlay near the Plaza restricts what materials you can install. The wildfire code in the hills restricts how those materials have to perform. Travis Oakley, who leads our team, has walked enough Sonoma roofs to know that a 1912 shake roof off East Napa Street and a 1980s tar-and-gravel flat roof in the Springs are two entirely different repair problems. Both get the same written. Both get the same guarantee. But the approach has to respect the house and the rules that govern it.

We’ve built a reputation in Sonoma by doing what we say we’ll do. The price goes on paper before we touch your roof. It does not move at the door. Every technician who shows up is background-checked and in uniform, so you know exactly who is on your property. And every repair carries a 365-Day Done Right Promise: if it fails within one full year, we come back and fix it at no charge. That’s in writing.

Commercial Roof Repair in Sonoma

Commercial Roof Repair in Sonoma often comes down to flat and low-slope systems on winery outbuildings, tasting rooms, restaurants around the Plaza, and small retail strips along Broadway. These roofs hide problems differently than pitched residential roofs. A small puncture in a flat roof membrane can sit for months, letting water in during winter and letting heat out all summer. By the time someone notices the stain on the ceiling, the insulation under the membrane is already saturated.

A typical commercial repair in Sonoma runs $650 to $2,400 depending on the size of the affected area and what we find once the membrane is opened. Most calls are for membrane punctures from foot traffic or fallen branches, failed seams at parapet walls, or clogged drains that pond water and accelerate membrane breakdown. We document everything before, during, and after the repair with photos, and the owner sees a written price before any work starts. That’s how commercial work should run.

Low-Slope Membrane Patch

Patching a TPO or modified bitumen membrane requires cleaning the area, repairing the insulation below if it’s wet, and heat-welding or cold-applying a patch that bonds to the existing system. On flat commercial roofs in Sonoma, we also check the drain scuppers while we’re up there because most membrane failures on commercial buildings trace back to standing water.

Parapet and Edge Flashing Repair

Commercial roofs with parapet walls fail at the metal-to-membrane transition more than anywhere else. The counterflashing pulls away, sealant cracks in the heat, and wind-driven rain takes the path of least resistance. We strip the failed material, install new termination bar and sealant, and document the repair so a building owner knows exactly what was done.

Roof Leak Repair in Sonoma

Roof Leak Repair in Sonoma typically runs $380 to $1,100 depending on where the water is getting in and how long it’s been doing it. Most leaks we find are not where the homeowner thinks they are. Water that shows up as a stain on a bedroom ceiling off Verano Avenue might be entering at a rusted pipe boot twenty feet upslope and running along a rafter before it finds a weak spot. That’s why we trace, not guess.

An older Sonoma home compounds the problem. Original skip sheathing from the 1920s leaves gaps between boards, so water can travel unpredictably. The felt underlayment may have disintegrated decades ago. We approach a leak repair on these houses as an investigation: we check the obvious suspects first (flashing, boots, valleys), then pull back a course of roofing in the wet zone to see what the decking and underlayment look like. That’s how you fix a leak once instead of chasing it through three return visits.

Flashing Repair and Replacement

Flashing failures drive more Sonoma roof leaks than anything else. On older homes around the Plaza and downtown, the original galvanized flashing at chimneys, sidewalls, and dormers has had eighty to one hundred thirty years to corrode. When Diablo winds push rain sideways, water walks right through the corrosion points. We replace it with modern materials and proper overlap, then seal and fasten everything so it survives the next wind event.

Vent Boot and Valley Repair

Rubber vent boots crack in Sonoma’s summer heat and let water in at the pipe. It’s one of the cheapest repairs we do, usually $380 to $650, and one of the most common call reasons during the first rain after a hot fall. Valley repair is more involved because valleys concentrate water from two roof slopes. When the valley metal rusts through, we pull the surrounding shingles or shake, replace the metal, and reinstall with new underlayment.

Trusted Brands We Service in Sonoma

We install and repair roofing from GAF, CertainTeed, Owens Corning, Atlas, and Tamko, and we’ll tell you plainly which material makes sense for your house and your street. A homeowner in the design review overlay near the Plaza might need a specific shake profile or tile color to satisfy the preservation board. A homeowner in the hills might need a Class A fire-rated shingle from Atlas or GAF to keep their insurance company happy. We keep common repair materials stocked for faster turnaround on Sonoma jobs, and if a specific product has to be ordered, you’ll know the timeline before you commit.

Common Roof Repair Problems We See in Sonoma Homes

• Failed flashing on pre-1940 homes. The original galvanized metal at chimneys and dormers on Sonoma’s Victorians and Spanish Colonial Revival homes was not built for a century of service. It corrodes, separates at the seams, and lets wind-driven rain inside during Diablo wind events.
• Rusted drip edge at gable ends and eaves. Drip edge keeps water from wicking back under the first course of roofing. On older Sonoma homes, it rusts through at the corners and along the eave line, and then water works into the fascia and soffit framing.
• Splitting wood shake in the downtown overlay. Shake roofs near the Plaza can’t be swapped for asphalt, so repair means matching the existing shake profile. The problem is that the whole roof may be aging out at once, and shake fails from the inside. Repairs buy time, but each one comes with a written assessment of how much time is actually left.
• Ember-vulnerable vents and eaves on hillside homes. Between fall and late winter, Diablo winds push dry air down from the Mayacamas and carry any spark for miles. Homes off Trinity Road and Cavedale Road need ember-resistant vent screens and properly detailed eave enclosures, because a repair that ignores those details isn’t truly a repair in Sonoma’s fire zone.

Pricing for Roof Repair in Sonoma, CA

We Also Serve Cities Near Sonoma

Brennan Roofing handles Roof Repair in Sonoma and the surrounding communities, with crews regularly dispatched to Boyes Hot Springs, Petaluma, Novato, and Cotati. Each of these towns has its own housing stock and repair profile, but the same Garrison Standard applies everywhere we work. If you’re in any of these areas, the phone rings through to a live person and the estimate is free.

FAQs About Roof Repair in Sonoma