Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roofing Company Across Napa
Roofing work in Napa runs into two problems most other California cities never see at once: earthquake-damaged roof-to-wall connections from the 2014 South Napa quake and strict Class A fire assembly rules across the eastern foothills. That combination means a re-roof here is rarely just a shingle swap. Mercer Roofing has crews working Napa neighborhoods every week, and we back our work with our Roof Repair in Napa. When you call (743) 200-8347, a live person answers, not a voicemail. We send every technician’s name and photo before they arrive, and we put every price in writing before any work begins.
That last part matters more than most homeowners realize. A written quote with a fixed scope protects you from the surprise change orders that plague roofing jobs, especially on older Napa homes where decking and flashing conditions stay hidden until tear-off. We scope for those unknowns up front, not after the contract is signed.
Why Mercer Roofing Is Napa’s Preferred Roofing Company
Napa homeowners tend to ask the same first question: who is actually coming to my door? We answer it before you ask. Every Mercer technician is background-checked, identity-verified, and uniformed. Before the visit, you get the technician’s name and photo. At the door, they present a photo ID badge. That is the Roofing Company standard we built under the Threshold Verified framework, and each independently owned location is contractually held to it.
Our work across Napa from the central flatlands to the Silverado Trail benchlands has taught us which roof failures repeat in this valley. We know which 1960s ranch subdivisions have the worst seismic fastener corrosion, which Carneros-facing roof planes grow moss first, and which hillside lots need a Class A assembly even when the homeowner is only asking for a patch. That local knowledge goes into the written quote, not a vague allowance line.
Founded in 2000 as part of the Threshold Group family, Mercer Roofing backs every repair with a 365-Day Done Right Promise. If the repair is not right within a year, we make it right. You also get a written guarantee on every repair, included with every job, with no conditional language. If a repair fails, the second visit is free.
Commercial Roofing in Napa
Commercial Roofing across Napa spans winery production buildings, tasting room annexes, ranch shops, and the occasional small office building along Solano Avenue or Soscol Avenue, and the scoping questions here are different from a single-family home. Dock areas and low-slope sections need membrane decisions early. Occupied spaces below mean tear-off containment and scheduling around business hours. If the structure is in the eastern foothills HFHSZ, the Class A requirement applies to the entire assembly, including the low-slope sections, and Napa County inspectors review it line by line.
Typical commercial roofing work in Napa runs $14,000 to $55,000 depending on square footage, slope, and whether the existing decking survives tear-off. A full winery production building re-roof with standing-seam metal can reach $90,000 or more when structural retrofitting and fire assembly requirements enter the scope.
Warehouse and Production Buildings
Winery barrel rooms and crush pads put heat and humidity load on the underside of the roof deck, which accelerates fastener corrosion and underlayment breakdown. We inspect the deck fasteners on these jobs before quoting, because what looks like a straightforward re-roof can hide loose decking connections from the 2014 earthquake. Re-fastening before installing new roofing is standard on our commercial scopes, not an add-on.
Ranch Shops and Outbuildings
On acreage lots east of Napa, ranch shops and equipment barns often have metal roofing with rusted-out panel laps and failing closure strips. Homeowners sometimes treat these as separate from the house roof, but the same HFHSZ rules apply to outbuildings on the property. We quote the outbuilding with the same Class A materials and seismic fastener checks we apply to the main residence.
Metal Roof Installation in Napa
Metal Roof Installation in Napa shows up most often on estate homes, winery structures, and replacement projects on mid-century roofs that have failed at the flashing points. Napa County’s combination of hot summers and winter wet-dry cycles makes a properly installed standing-seam system last far longer than asphalt, but only if the underlayment and fastener schedule are right for this valley’s temperature swings. The marine fog that rolls through Carneros condenses on metal panels every morning for months, so the underlayment choice matters more than the panel profile.
Standing-seam metal roofing in Napa typically runs $25,000 to $70,000 for a main residence depending on panel gauge, seam profile, and roof complexity. Clay tile-to-metal conversions on older Napa homes run higher, usually $40,000 to $85,000, because they involve full tear-off of the existing tile, decking inspection, and often seismic re-fastening.
Standing-Seam for Estate Homes
High-end estate homes in the eastern benchlands frequently call for metal roofing in Napa County because of the HFHSZ designation. Metal is a Class A fire-rated material without requiring additional fire-retardant treatment, which simplifies the permit review. The look also matches the agricultural character of the valley better than asphalt on larger properties.
Winery Structure Roofing
Winery structures have specific roof demands: barrel rooms need consistent thermal performance, crush pads shed rain fast, and tasting rooms carry a lot of architectural weight in their roof design. We install standing-seam metal in the GAF, CertainTeed, and Owens Corning product lines where the profiles match, and we source panels locally for Napa jobs to keep lead times short. Every installation gets the same written guarantee and 365-Day Done Right Promise.
Trusted Brands We Service in Napa
We install and repair using manufacturer-recognized shingle and metal systems from GAF, CertainTeed, and Owens Corning, and we keep common replacement components stocked for Napa’s roofing patterns: clay barrel tile replacements, standing-seam panels for winery structures, and Class A rated asphalt architectural shingles. That local stocking means a repair on a north Napa bungalow or an east Napa ranch does not wait a week for a shipped part. When we quote a brand-line roof, the written price includes the specific product line, not a generic “comparable quality” substitute.
Common Roofing Company Problems We See in Napa Homes
- Seismic re-fastening gaps from the 2014 South Napa earthquake. Thousands of Napa homes had roof-to-wall connections inspected after the M6.0 quake, but many were never fully reinspected. We routinely find loose or corroded connectors on homes where the previous roof was installed before 2014, especially on 1950s and 1960s ranch homes in east Napa.
- HFHSZ requirements on partial re-roofs. In the eastern foothills, Napa County building inspectors have red-tagged patch jobs that use non-rated materials. A homeowner who calls for a small repair sometimes learns the entire roof assembly needs Class A compliance, and we scope that before quoting so the permit passes on the first submission.
- Moss and algae on Carneros-facing roof planes. The daily marine fog off San Pablo Bay keeps north-facing roof planes damp in the morning, which accelerates moss and algae growth. Napa’s reputation for sunny weather hides how wet the south end of the valley is, and homeowners often do not notice roof damage until a soft spot appears.
- Long driveways and septic setbacks on acreage lots. Homes off Silverado Trail and in the eastern benchlands often have long driveways, well heads, and septic leach fields that restrict where equipment can be staged and where material can be stacked. We map those constraints before we quote, and the written price reflects them instead of leaving the yard as a surprise.
Pricing for Roofing Company in Napa, CA
Here are real numbers for Napa roofing work. A standard asphalt shingle re-roof on a 1,800-square foot ranch home runs $12,000 to $19,000. A partial repair, like a flashing replacement or a valley leak, runs $450 to $1,800. Standing-seam metal on a main residence runs $25,000 to $70,000. Clay tile-to-metal conversion runs $40,000 to $85,000. Commercial roofs run $14,000 to $55,000 for most Napa structures, and winery production buildings can reach $90,000 or more.
What moves the number in Napa: whether the home is in the HFHSZ, whether the roof sits over a 2014 earthquake-era structure that needs re-fastening, the driveway length and staging area on acreage lots, and whether the existing decking survives tear-off. Every Mercer quote includes a written price before any work starts, and the final invoice matches the quote. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Napa
Beyond Napa, our crews cover Deer Park, Boyes Hot Springs, Sonoma, and Winters. The same written-quote policy, the same badge-at-the-door promise, and the same 365-Day Done Right Guarantee apply everywhere we work. Dispatch and scheduling are coordinated from the brand’s San Francisco Bay Area office, and crews serve Napa locally.
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 Roofing Company in Napa
Yes, in most cases Napa County inspectors require a full Class A fire-rated assembly even on a partial re-roof in the HFHSZ, particularly in the eastern benchlands near the 2017 Atlas Fire burn scar. We include the Class A compliance in the written scope and permit application before work starts, so the job passes inspection without red-tagging. Call (743) 200-8347 for a free estimate that front-loads this requirement.
We map the driveway, well head, septic leach field, and staging area before we quote. Long driveways off Silverado Trail and hillside lots in the eastern benchlands often require smaller equipment or a specific material stacking plan, and those decisions change the job cost. The written price reflects the actual site constraints, not a generic allowance. Call (743) 200-8347 to schedule a site walk and get a written quote.
It means the roof-to-wall connections on your home may have been compromised and never fully repaired. We inspect the fasteners and connectors during the roof assessment, especially on homes built before 2014, and we include any re-fastening in the quoted scope. If your roof dates from before the quake and you have never had a seismic check, call (743) 200-8347 to have a Mercer technician look at it.
The Carneros district and south Napa valley see daily marine fog off San Pablo Bay, which keeps north-facing roof planes damp and accelerates moss and algae growth. Homes on the south end of Napa deal with roof moss far more than the valley’s sunny reputation suggests, and we inspect those roof planes closely during every assessment. If you suspect moss damage on your roof, call (743) 200-8347 for a free estimate.
Yes, standing-seam metal installation is a core part of our Napa work, on winery production buildings, tasting room annexes, and estate homes throughout the valley. We install GAF, CertainTeed, and Owens Corning metal systems where the profiles match the structure, and every installation carries a written guarantee. Call (743) 200-8347 to scope a standing-seam metal roof on your property.
We re-roofed a 1965 ranch in the eastern benchlands near the Atlas Fire burn scar where the original Class C shingles had been patched with non-rated material after the 2014 South Napa earthquake. Our crew pulled the compromised decking, added ice and water shield in the valleys, installed a Class A architectural shingle system with a starter strip and ridge vent, and rebuilt the chimney flashing to match the seismic re-fastening the county required. The inspector signed off on the first pass because we front-loaded the HFHSZ compliance into the permit application. That is how we approach every Roofing Company in Napa job: scope the local requirements before we quote, not after the inspector shows up.
Call Mercer Roofing for Your Free Napa Estimate
Every Napa roofing project starts with a written price and a technician whose name and photo you receive before they arrive. No surprises, no door you feel uneasy opening. Grant Whitlock leads the team, and we answer the phone live at (743) 200-8347. Schedule your free estimate today.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Napa since 2000.