Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roof Repair Across Sonoma
A roof repair in Sonoma typically runs $350 – $900 for most leak fixes, shingle replacements, and flashing work, while larger storm-damage or tile repairs on Wine Country homes commonly land between $900 and $2,400. Most repairs are completed in a single visit, and we coordinate scheduling so a Sonoma homeowner isn’t left waiting through a rainy week. Call (743) 200-8347 and you’ll get a live person, not a voicemail, and a written price before any work starts.
Sonoma roofs take a beating that’s specific to this valley. The winter rains that arrive in concentrated bursts between November and March, the summer heat that bakes clay tile mortar past 100°F, and the marine fog that slips through the Petaluma Gap and settles on north-facing roof planes. Add in the Wildland-Urban Interface code requirements that govern re-roofing permits here, and you understand why Sonoma needs a roofer who knows this city’s housing stock and rules, not just someone passing through from a neighboring county.
Why Mercer Roofing Is Sonoma’s Preferred Roof Repair Company
Mercer Roofing was founded in 2000 and operates as part of the Threshold Group family of home-service companies. Every technician who arrives at a Sonoma home has been background-checked, identity-verified, and trained to the Threshold Verified standard. Before the visit, you get the technician’s name and photo. At the door, they present a photo ID badge and arrive in a clean, marked uniform. That’s the baseline here, not an upgrade.
Sonoma homeowners tell us the same thing again and again: the moment they know exactly who is walking up their driveway, the whole experience changes. Whether it’s a parent home alone with young children or a retired couple in Boyes Hot Springs, the badge-at-the-door promise matters. We sent a technician to a home near the Plaza where the owner said she’d called three roofers before us and none had provided a name ahead of time. She chose Mercer because we did.
Our Roof Repair team includes technicians who work Sonoma properties regularly. That means when we arrive in El Verano, we know what we’re going to find before we climb the ladder. Older wood shake underlayment gone brittle. Failed galvanized flashing on a mid-century ranch. Clay tile mortar cracks at the ridge. It’s local knowledge earned on actual Sonoma roofs, not a generic training module.
Every repair we complete in Sonoma carries a written guarantee. The 365-Day Done Right Promise means if the work isn’t right within a year, we make it right, including a free second visit if the repair fails. That guarantee is written, not implied.
Shingle Roof Repair in Sonoma
Shingle Roof Repair in Sonoma most often means replacing wind-lifted or cracked architectural shingles on the mid-century ranch homes common in neighborhoods like Temelec and across the valley floor. A typical shingle replacement runs $350 – $700 depending on the number of shingles, the roof pitch, and whether the underlayment beneath needs attention. If you have curling shingles at the eaves or granule loss showing in your gutters after a winter storm, that’s a repair we can usually complete the same visit.
Architectural Shingle Replacement
Most Sonoma homes built after 1980 use architectural shingles from GAF, CertainTeed, or Owens Corning. We match the shingle by brand and color so the repair blends in. When we pull up a damaged shingle and find the nails have rusted through, that’s a sign marine fog has been doing quiet work underneath, and we’ll check surrounding shingles before sealing everything back down.
Valley and Vent Boot Repairs
Valleys are where two roof planes meet, and they channel the most water. When shingles along a valley come loose or the metal beneath is corroded, leaks follow. Vent boot repairs run $280 – $450 in Sonoma and are one of the most common small jobs we do. A cracked rubber boot around a plumbing vent can leak for months before a homeowner notices the ceiling stain.
Storm Damage Roof Repair in Sonoma
Storm Damage Roof Repair in Sonoma typically runs $600 – $2,400, depending on how many shingles are torn, whether flashing was pulled loose, and if any decking got exposed. The atmospheric river storms that hit Sonoma Valley in winter drive wind and rain hard against west-facing slopes and roofs near the foothills. When a storm passes, we often find ridge cap shingles lifted, valley metal dented, and debris piled against vents.
Wind and Rain Damage Assessment
After a storm, the first thing we do is a full inspection, not a quick patch. That means walking the entire roof, checking for lifted shingles, and looking at every flashing point. A torn shingle on a north-facing plane in Sonoma is often a bigger problem than it looks, because the fog that settles there keeps the decking damp long after the rain stops. We document everything with photos and give you a written repair plan before touching anything.
Emergency Tarp and Temporary Cover
If a tree branch or wind gust has opened a hole in your roof during a storm, we can install a temporary water-tight cover to stop further damage while the permanent repair gets scheduled. This is not a permanent fix, but it stops the bleeding. Call (743) 200-8347 and a live person answers, day or night. We’ll get you on the schedule and give you a written price for the permanent repair.
Trusted Brands We Service in Sonoma
We work with shingle and tile manufacturers whose products carry proven fire ratings for California’s WUI zones, including GAF, CertainTeed, Owens Corning, and Atlas. For Sonoma County, we keep common shingle colors and accessories available for quick turnaround, because matching a discontinued shingle color on a Sonoma hillside estate is not something you want to wait a week for. If your roof uses a specific brand or profile, we match it. If it’s discontinued, we’ll tell you what options exist and what each costs before you decide.
Common Roof Repair Problems We See in Sonoma Homes
- Class A shingles over non-rated underlayment. Sonoma’s WUI designation requires the entire roof assembly to meet Class A fire standards, not just the surface material. Local inspectors fail jobs where Class A tile was installed over standard felt. We see this constantly on re-roofs attempted by out-of-area contractors who don’t know the code nuance.
- Corroded flashing and fasteners. Marine fog pushed through the Petaluma Gap settles on roof surfaces and accelerates rust on standard galvanized valley metal and nails. Within five to seven years, that corrosion lets shingles lift and tile slip. We specify stainless steel flashings and hot-dip galvanized fasteners on affected Sonoma properties.
- Clay tile mortar cracks at ridges and hips. Summer heat above 100°F expands tile, and winter rain contracts it. Over time, the mortar at ridge and hip lines cracks away, letting water reach the underlayment. On Spanish Colonial Revival homes near the Plaza and throughout Sonoma’s historic districts, this is the single most common leak source we find.
- Moss and lichen on north-facing planes. The fog that funnels through the Petaluma Gap keeps north-facing roof surfaces damp for long stretches. Moss takes root, holds moisture against shingles, and shortens the roof’s life. We remove it carefully and can recommend whether a preventive treatment makes sense for your situation.
Pricing for Roof Repair in Sonoma, CA
Here’s what Sonoma homeowners can expect to pay for common roof repairs. Shingle replacement runs $350 – $700. Vent boot repair runs $280 – $450. Flashing repair around chimneys or skylights runs $450 – $900. Clay tile repair, including resetting tile and re-mortaring at ridges, runs $600 – $1,400 depending on access and how many tiles are loose. Storm damage repairs, which often combine several of these, run $600 – $2,400. The biggest cost driver in Sonoma is whether the underlayment beneath the surface needs work, because that’s where WUI code compliance and years of fog and heat show up first. Every estimate is written, line-itemed, and given to you before any work starts. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Sonoma
Mercer Roofing handles roof repairs throughout Sonoma County and beyond. Our Sonoma crews regularly take calls from homeowners in Boyes Hot Springs, Petaluma, Novato, and Cotati, and we’re familiar with the different code requirements and housing stock in each of those communities. If you’re a few miles outside Sonoma proper, call (743) 200-8347 and we’ll confirm coverage for your neighborhood.
Serving Sonoma, CA - Our Local Coverage Area
We’re based in the Sonoma area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Repair in Sonoma
Sonoma’s Wildland-Urban Interface code requires Class A rated underlayment, not just Class A surface materials. That means the materials we specify for a Sonoma re-roof sometimes cost more than what a Petaluma roof may need, where the WUI designation does not apply. When you compare quotes, ask whether underlayment is included and whether it’s Class A. If it isn’t, the repair may not pass inspection here. That’s the hidden cost difference, and it’s exactly the kind of thing we write into every Sonoma estimate from the start. Call (743) 200-8347 for a written breakdown specific to your address.
Most of the time, no. The clay tile itself can last decades. What fails first is the mortar at ridges and hips, and the underlayment beneath the tile. We can repair mortar joints and replace individual broken tiles, and if the underlayment is still intact, the repair is done. Where we find underlayment that has baked brittle under years of Sonoma heat, or that was never Class A rated, the repair expands. We’ll show you exactly what we found and give you a written scope before any work proceeds.
Ask your contractor to confirm in writing that the underlayment is Class A fire-rated. Sonoma’s WUI code requires the roof assembly, underlayment included, to meet Class A standards. If a roofer quotes you Class A shingles but doesn’t mention underlayment, that’s a red flag. Our Sonoma repairs specify Class A rated underlayment wherever the roof assembly is touched. We write it into the quote so there’s no ambiguity at inspection time.
Marine fog pushes through the Petaluma Gap and settles on north-facing roof surfaces, keeping them damp far more often than south-facing planes. Moss and lichen take root in that damp microclimate and hold moisture against the shingles, which accelerates wear. We remove growth carefully and can recommend a maintenance schedule based on how your roof is oriented.
Yes. If the storm damage is limited to lifted shingles, torn ridge cap, or loosened flashing, we can repair those areas without a full re-roof. The key is getting the repair done before water gets under the decking and causes rot. In Sonoma, where winter storms come in fast succession, a small leak can become a big one quickly. Call (743) 200-8347 and we’ll schedule a damage assessment with a written quote for what’s actually needed.
On a Spanish Colonial Revival near the Plaza, we tore off a failed clay tile repair and found the original 1990s underlayment had baked brittle under 100°F summers and was never Class A rated. We specified a Class A fire-rated underlayment, replaced corroded galvanized flashings with stainless steel, and installed new hot-dip galvanized drip edge before resetting the tile. The homeowner passed inspection on the first try, a relief since the prior contractor’s non-rated underlayment had already failed once.
If your Sonoma roof needs a repair, call (743) 200-8347 for a free estimate. You’ll speak with a live person, get a written price before any work begins, and know exactly who is coming to your door before they arrive.
Written by Grant Whitlock, Owner at Mercer Roofing, part of the Threshold Group family of home-service companies, founded in 2000.