Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
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AfterFast, Reliable Roof Repair Across Napa
Roof repair in Napa usually runs between $350 and $1,600 for most leak and flashing jobs, with shingle replacement on a standard ranch home averaging $550 to $1,100 depending on decking condition. We get to Napa homes within one to three days for non-emergency calls, and we answer live at (743) 200-8347 around the clock. The reality in this valley is that a roof here rarely fails from one thing alone. It fails because winter rain forces water into gaps that seismic movement opened a decade ago, or because fog-dampened underlayment finally gave out under a tile that looked fine from the ground. Knowing that before we open anything up changes what the repair actually costs you, and what it should cost to do it right the first time.
Why Mercer Roofing Is Napa’s Preferred Roof Repair Company
Homeowners in neighborhoods from Browns Valley to Alta Heights call us because we show up the way we said we would. Every Mercer technician is background-checked and identity-verified under the Threshold Verified standard, and before any visit we send you the name and photo of the person coming to your door. They arrive in a clean, marked uniform with a photo ID badge and present it before stepping inside. For parents home with young children, people working alone, or older homeowners who want proof of who is on their property, that is not a nice detail. It is the reason they picked us.
Founded in 2000 and part of the Threshold Group family of home-service companies, Mercer Roofing operates each location independently while holding every technician to the same vetting standard. We do not ask you to trust a name on a truck. We give you a face, a written price before any work starts, and a written 365-Day Done Right Promise on every repair we perform. Dispatch and scheduling for Napa are coordinated from our San Francisco Bay Area office, with crews serving the valley locally.
Storm Damage Roof Repair in Napa
Storm Damage Roof Repair in Napa is less about thunderstorm hail and more about what a six-inch winter rain event does to a roof that already carries hidden damage from the 2014 South Napa earthquake. Water finds the lifted flashing around chimneys and skylights, works under shingles at roof-to-wall connections that shifted, and soaks decking before you ever see a stain on the ceiling. A Napa storm repair often means replacing flashing, re-securing loosened connections, and drying and re-sheeting decking, not just nailing down a few lifted shingles. Most storm repairs on Napa homes run $450 to $1,300, with full decking sections adding $200 to $400.
Seismic Re-Fastening After the Storm
In the 1920s Craftsman homes around the downtown grid and in mid-century ranch houses east of Jefferson Street, storm water intrusion frequently traces back to roof-to-wall anchors that the 2014 earthquake pulled loose and nobody ever re-tightened. We check those connections on every storm repair. If they are compromised, we re-fasten them before we seal the roof, because patching the shingle above a loose anchor just means the next storm finds the same gap.
Chimney Flashing and Dry Rot
Chimney flashing on older Napa homes takes a beating in wet winters, especially on single-story bungalows where the valley fog condenses against brick surfaces. We replace step and counter-flashing as a matched system rather than caulking over old metal. When decking around the chimney has gone soft, we re-sheet it and include that cost in writing before work begins.
Metal Roof Repair in Napa
Metal Roof Repair in Napa is common on the high-end estate homes and winery structures that line the valley from Oak Knoll to Stags Leap, many of which feature standing-seam metal or clay barrel tile installations. A standing-seam roof is not repaired the way a shingle roof is. It requires matching the seam profile, replacing the clips or fasteners correctly, and sealing penetrations without trapping moisture beneath the panel. Repairs on standing-seam metal in Napa typically run $500 to $1,400 depending on access and the seam width. Clay barrel tile repair runs $600 to $1,800, since broken tiles usually sit over a failed underlayment that also needs work.
Standing-Seam and Penetration Details
Leaks on metal roofs in Napa most often start at roof penetrations: vent pipes, skylights, and chimney surrounds where the original boot or flashing has aged out. We replace boots with the correct profile for the metal, not a generic rubber sleeve that splits in the valley’s winter wet-dry cycling.
Clay Tile and Estate Home Repairs
Clay barrel tile roofs on Napa estate properties look rugged but hide underlayment failures for years while water runs beneath the tile and pools on the decking. We remove the minimum tile run needed, replace failed underlayment and battens, and reset the original tile where possible. The alternative, spot-sealing visible cracks while water travels underneath, is how a $600 repair becomes a $6,000 re-roof.
Trusted Brands We Service in Napa
We work daily with shingle systems from GAF, CertainTeed, and Owens Corning, which covers the majority of Napa’s residential and winery roof stock. Keeping common profiles and accessory parts on hand for these brands means we can match shingle color and texture on a mid-century ranch near Coombsville without waiting on a special order. For standing-seam metal and clay tile work across the valley, we source through the manufacturer’s recognized channels so warranties stay intact. If your Napa roof carries a brand you do not see listed here, call us. We will tell you plainly whether we can match it or whether the better move is a full replacement of that slope.
Common Roof Repair Problems We See in Napa Homes
- Earthquake-loosened roof-to-wall connections. Thousands of Napa homes never fully reinspected after the 2014 M6.0 South Napa earthquake still carry stretched or loose framing anchors. Water follows these gaps in every winter storm, and skipping re-fastening means the repair fails again.
- Fog-driven moss and algae on north-facing planes. The daily marine fog that pushes through the Carneros district off San Pablo Bay keeps north slopes damp even in summer. Algae and moss grow, hold water against the shingles, and accelerate granular loss, and pressure washing over failed underlayment does not fix the true leak.
- Flashing failures at chimneys and skylights. In older central-flatland neighborhoods like Fuller Park and the downtown grid, chimney step flashing on Victorians and Craftsman bungalows is often original or patched with tar. Once the metal rusts through or lifts from seismic movement, water enters the decking and travels along rafters before showing up inside.
- Non-rated materials in hillside High Fire Hazard Severity Zones. Napa County inspectors hold eastern benchland homes to strict Class A assembly rules even on partial repairs. Patching with non-rated materials gets red-tagged, and the homeowner then pays twice: once for the failed patch and again for the compliant repair.
Pricing for Roof Repair in Napa, CA
What should a Napa homeowner expect to pay? For the most common leaks, a fair price sits between $350 and $800. That covers flashing replacement, vent boot repair, or sealing a single penetration. Shingle work on a partial slope runs $550 to $1,100 depending on decking condition and access. Metal and clay tile repairs run higher, typically $500 to $1,800, because they involve matching specialized panels or tile and often fixing the failed underlayment underneath. The single biggest variable on older Napa homes is what we find under the first layer. When we open a roof on a 1920s bungalow, we may find decking soft from decades of slow leaks, or framing that needs sistering before new sheathing goes down. We price that work in writing before we touch it. You get a free estimate at (743) 200-8347, and the price we quote is the price you pay unless you approve a change in writing first.
We Also Serve Cities Near Napa
Our Roof Repair crews serve the full Napa Valley and beyond. Beyond Napa itself, we regularly work in Deer Park, Boyes Hot Springs, Sonoma, and Winters. If you are in a hillside home above Rutherford or a bungalow near the Sonoma Plaza, the same written pricing and Threshold Verified standard applies. This page covers Roof Repair in Napa specifically; if you are in a nearby town, call and we will route you to the right crew.
Serving Napa, CA - Our Local Coverage Area
We’re based in the Napa 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 Napa
Most straightforward repairs on Napa homes, like replacing a flashing or resealing a penetration, do not require a permit. The trigger comes when a repair requires structural work, such as re-sheathing decking or re-fastening roof-to-wall connections, or when the roof sits in an HFHSZ and you are touching a fire-rated assembly. In those cases, the permit process may require bringing the affected area up to current code, including Class A fire-rated materials on the hillside benchlands and seismic fastening on homes with 2014 earthquake damage. That is exactly why we inspect first and put allowances in writing before any work starts, so the permit triggers are priced and approved, not discovered mid-job.
Because Napa sat on top of the South Napa earthquake in 2014, and thousands of homes in the valley still carry stretched or loosened roof-to-wall anchors that were never re-tightened. A roof repair that re-seals the shingles without re-fastening those connections is just pushing the problem to the next storm. Call (743) 200-8347 for a free inspection if you have a leak and suspect your home was affected by the quake.
Napa County requires fully compliant Class A fire-rated assemblies even on partial re-roofs in the HFHSZ, which includes much of the eastern foothills. An out-of-area contractor who patches with non-rated material can get the job red-tagged by the building inspector. We front-load Class A requirements into every hillside scope and permit application so the repair passes inspection the first time.
The daily marine fog that funnels through the Carneros district and across the south valley off San Pablo Bay keeps north-facing roof planes damp well into summer mornings. Moss and algae take hold, trap moisture against the shingles, and hide the fact that underlayment underneath has already failed from years of wet-dry cycling. Surface cleaning removes the growth but not the leak; we address the underlayment and flashing instead.
We do not guess. We open the affected slope far enough to see the decking, the flashing, and the connections before we quote the repair. Then we write the price for everything we found, plus a written allowance for the work a permit may trigger. You approve that in writing before we touch the shingles. Most Napa repairs start between $350 and $800 and stay there when the structure beneath is sound; the common variable is soft decking, which adds $200 to $400 per section. For an exact quote on your home, call (743) 200-8347, estimates are free.
How a Napa Roof Repair Actually Works
In a valley where a roof can carry earthquake damage and fire-zone requirements at the same time, the repair process has to start with inspection, not a caulk gun. We open the affected area, document what we find, re-fasten loose roof-to-wall connections, replace failed flashing and underlayment, re-sheet soft decking, and price every code-triggered upgrade in writing before any of it happens. On a 1920s Craftsman bungalow in the older central flatlands, our crew opened a water-stained ceiling to find the decking soft around a chimney penetration, the flashing lifted from seismic movement, and asbestos-era wiring running through the same framing we needed to sister. We re-sheeted the decking, installed ice and water shield and new flashing, re-fastened the roof-to-wall connections, and priced the framing and permit-triggered upgrades in writing before we touched the shingles. That is how a repair stays a repair instead of becoming an unpriced remodel.
Who Shows Up at Your Napa Door
You will know before the visit. We send the technician’s name and photo ahead of time, and the person at your door carries a photo ID badge and wears a clean, marked uniform. Every Mercer technician is background-checked and identity-verified under the Threshold Standard. For anyone in Napa who has hesitated to call a roofer because they did not want a stranger at the house, that is the most important sentence on this page.
Call Mercer Roofing for Your Napa Roof Repair
If you have a leak near Coombsville, lifted flashing on a downtown Victorian, moss on a Carneros north slope, or a hillside repair that has to pass a Class A fire inspection, call (743) 200-8347. You will get a live person, a free estimate, and a written price before any work starts. Every repair carries our 365-Day Done Right Promise in writing and a free second visit if the repair fails within the year. That is not a slogan. It is the contract.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Napa since the company was founded in 2000.