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 St. Helena
If you own a home or estate building in St. Helena, you already know the roof is the first line of defense against Napa Valley heat, winter downpours, and autumn Diablo winds. Our Roofing Company crews work on St. Helena properties every week, from Victorians near Main Street to stone winery buildings off the Silverado Trail. We answer the phone at (945) 303-9821, we show up in the window we give you, and every job starts with a written price before any work begins. No surprises at the door, no change orders halfway through.
St. Helena sits in a unique spot. Valley floor heat, hillside wildfire exposure, and century-old framing all put different demands on a roof than you’d find ten miles south in Napa or over the hill in Santa Rosa. Greg Holloway leads our St. Helena crews with a simple rule: scope it properly before quoting it, and put the guarantee in writing before the first nail goes in.
Why Tilehurst Roofing Is St. Helena’s Preferred Roofing Company
Tilehurst Roofing is a Kingswell family company, founded in 2000, and built for homeowners who have already been burned once by a no-show or a price that changed at the door. St. Helena customers tend to be direct about what they want: a roofer who answers the phone, arrives when promised, and stands behind the work. That’s the Kingswell Way, and it’s not a slogan. Say the price before the work. Show up in the window we gave. Leave the place cleaner than we found it. Put the guarantee in writing. Come back if it fails.
Every repair carries a written guarantee, delivered before the crew leaves the property. If that repair fails inside the guarantee period, we return at no charge under the 365-Day Done Right Promise. That’s a full year of documented accountability on every job, not a verbal assurance. Our technicians are background-checked and uniformed, so you know exactly who’s walking your roofline. And when you call, a live person answers 24 hours a day, seven days a week. No voicemail, no callback queue, no waiting until Monday.
St. Helena reviews consistently mention two things: the crew showed up when they said they would, and the written price matched the final invoice. That’s not luck. That’s how we schedule and how we quote.
Commercial Roofing in St. Helena
Commercial Roofing in St. Helena means something different than commercial work in a dense metro. Here it’s winery production buildings, tasting room annexes, stone-walled estate structures, equipment barns, and the occasional Main Street storefront with a flat or low-slope roof that’s been patched too many times. The job involves membrane systems, TPO or PVC where the slope allows, proper drain placement, and often a structural check on framing that predates modern load tables.
Winery and Estate Buildings
A production building roof over a barrel room can’t leak. Humidity and temperature swings inside those spaces make even a small breach destructive fast. We scope drainage, check parapet flashing and scupper outlets, and quote the membrane system that matches how the building actually sheds water, not just what’s cheapest per square foot. Most St. Helena commercial re-roofs on these buildings run $18,000 to $45,000 depending on squares, decking condition, and access.
Flat and Low-Slope Commercial Roofs
Main Street commercial buildings and valley-floor warehouses often have flat or near-flat roofs that fail around penetrations: HVAC curbs, vent stacks, and old patch jobs. We inspect with core cuts when the owner will approve them, write the price, and replace with an adhered or mechanically fastened membrane rated for the heat load. Expect $12,000 to $30,000 on a typical St. Helena flat roof replacement, with decking repair itemized separately if rot is present.
Metal Roof Installation in St. Helena
Metal Roof Installation in St. Helena has become more common on hillside parcels since the 2020 Glass Fire, and for good reason. Standing seam and exposed-fastener metal panels carry a Class A fire rating that satisfies Napa County’s wildland-urban interface requirements, and they shed debris better than asphalt during Diablo wind events. The job involves tearing off the old surface, checking the decking and framing, laying a high-temperature underlayment, and installing panels with the correct thermal movement detail for the valley’s temperature swings.
Standing Seam for Estates and Outbuildings
On wine estate homes and detached structures, standing seam is the usual choice. It handles the steep pitches and complex rooflines common on older St. Helena buildings, and it holds up to the 100°F-plus valley heat without the accelerated granule loss asphalt shingles suffer here. A standing seam install on a typical 2,500-square-foot St. Helena home runs $28,000 to $55,000 depending on panel gauge, finish, and how much of the old decking needs replacement.
Exposed-Fastener for Shops, Barns, and ADUs
For outbuildings, shops, and detached ADUs on acreage, exposed-fastener metal keeps the cost down while still meeting Class A fire-rating requirements. These panels go up faster and cost less to replace if a branch ever punctures one. Budget $14,000 to $28,000 for a typical shop or barn roof in St. Helena, with the understanding that fastener gaskets need inspection every few years given the valley’s heat cycling.
Trusted Brands We Service in St. Helena
St. Helena homeowners often ask what brand is on our truck, and the honest answer is: whichever material fits the home. We install GAF, CertainTeed, and Owens Corning asphalt shingle lines, plus GAF’s metal systems where the project calls for it. We don’t push a single house brand. If a hillside estate needs a Class A assembly that also satisfies the city’s historic-character review, we’ll spec the product that does both, not whatever happens to be sitting in the warehouse. Parts and underlayment for these systems are stocked for fast turnaround on St. Helena jobs, so a repair quote today doesn’t wait on a truck from the Bay Area.
Common Roofing Company Problems We See in St. Helena Homes
- Valley and chimney flashing failures on older estate roofs. St. Helena’s winter rain concentrates hard, and a 60-year-old flashing detail around a chimney or dormer will show it. By the time you see a ceiling stain, the sheathing underneath has usually been wicking moisture for months.
- Accelerated asphalt shingle wear from valley heat. Summer temperatures on the St. Helena valley floor regularly cross 100°F, and that heat bakes granules off asphalt shingles years faster than in cooler coastal towns. We replace more prematurely aged shingle roofs here than in any neighboring city we serve.
- Wood shake roofs that no longer pass permit review. Dozens of surviving historic homes and estate buildings in St. Helena still have original or early wood shake. When any re-roof permit is pulled in a WUI zone, Napa County now requires a Class A fire-rated assembly, which forces a material change many owners didn’t expect. We walk every shake roof owner through the options before the permit goes in.
- Ponding and drainage problems on open acreage lots. A new roof on an open hillside or valley-floor parcel can redirect runoff toward an outbuilding, a shop, or a detached ADU if the grading plan isn’t part of the roofing scope. We flag this during the estimate walk, not after the first heavy rain.
Pricing for Roofing Company in St. Helena, CA
Our St. Helena customers ask for real numbers before they pick up the phone, so here they are. Asphalt shingle roof replacement on a standard St. Helena home runs $14,000 to $26,000 depending on squares, tear-off difficulty, and decking condition. Roof repair work, from a flashing rebuild to a valley replacement, typically runs $450 to $2,800. Metal roof installation runs $14,000 to $55,000 depending on panel type and building size. Commercial re-roofs run $12,000 to $45,000. The written quote you get from us breaks out every line item, including permit fees, dumpster, decking repair, and underlayment, so the price in your hand is the price you pay. Call (945) 303-9821 to schedule your free estimate.
We Also Serve Cities Near St. Helena
While this page speaks to St. Helena homeowners and estate properties directly, our crews also cover roof work across Los Angeles, San Diego, San Jose, and San Francisco. Each area has its own building department, its own climate patterns, and its own permitting quirks. If you’re in one of those cities, call (945) 303-9821 and we’ll route you to the right crew. Or read more about how we work in St. Helena and the surrounding valley.
Serving St. Helena, CA - Our Local Coverage Area
We’re based in the St. Helena 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 St. Helena
It depends on whether the property sits inside St. Helena city limits or on an unincorporated parcel. Inside the city, the permit runs through St. Helena’s building department. On acreage outside the city, including most hillside estate parcels and many wine properties, the permit runs through Napa County, not City Hall. That changes the inspection timeline, the paperwork, and in WUI zones the fire-rating requirements. We confirm the jurisdiction before we write the quote. Call (945) 303-9821 and we’ll check your parcel.
No, not if the property sits in a Napa County WUI zone and you’re pulling a re-roof permit. The county now enforces Class A fire-rated assemblies on these parcels, and untreated wood shake does not meet that rating. If the roof is in good enough shape to repair without a permit, a limited shake repair may be allowed, but any full re-roof triggers the material change. We’ll walk you through the Class A options including metal and fire-rated composite shake that reads closer to the original character than asphalt. Call (945) 303-9821 to have us look at the roof and pull your parcel’s WUI status before you commit to a material.
We scope it as its own job, but we always check the drainage and grading around the outbuilding at the same time. A new roof on a shop or ADU changes how water sheds, and on an open St. Helena lot that runoff can pond against the building’s foundation or wash toward a septic field. We also confirm septic and well setbacks before staging materials or placing a dumpster, because those setbacks can limit where a truck can park and where tear-off debris can go. Expect a shop or ADU roof to run $8,000 to $22,000 depending on size and material. Call (945) 303-9821 for a written line-item quote.
Two reasons: age and valley weather. St. Helena winters deliver concentrated rain, and summer heat cycles put real stress on metal flashing at chimneys, dormers, and valley intersections. On a 60-year-old estate roof, the flashing was likely installed before modern ice-and-water shield existed, and the soldered seams have simply worn out. The failure shows up as a ceiling stain, but by then the sheathing underneath has usually been wet for months. That’s why we inspect the full valley and decking condition on every repair quote. Call (945) 303-9821 and we’ll inspect before the next winter storm season.
Compare four things: whether the material is fire-rated for your specific parcel’s WUI status if applicable, whether decking repair is itemized or buried in a lump sum, whether the quote includes the correct permit jurisdiction and fees, and whether a written guarantee is part of the contract. A lower bid that reuses non-Class-A material on a hillside parcel will stall at the county permit desk. A bid with no written guarantee leaves you unprotected if the repair fails. Our quotes break out every line item, name the permit jurisdiction, and include the written guarantee before the crew starts. Call (945) 303-9821 for a free estimate and a bid you can actually compare line by line.
Call Tilehurst Roofing in St. Helena
If your roof needs a second look, a repair, or a full replacement, call (945) 303-9821. A live person answers, day or night. We’ll schedule a walk, scope the job the way it should be scoped, and put a written price in your hands before any work starts. Greg Holloway and the St. Helena crew are ready when you are.
Written by Greg Holloway, Owner at Tilehurst Roofing, serving St. Helena and the surrounding Napa Valley.