Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roofing Company Across Hercules
If you own a home in Hercules, you already know the drill: marine air off San Pablo Bay, steep terraced streets, and a roof that takes the brunt of every winter storm. Brennan Roofing Co San Francisco is a full-service Roofing Company serving Hercules with repair, replacement, inspection, and installation work on shingle, tile, metal, and flat systems. We answer the phone with a live person, write your price down before any work starts, and stand behind every job for a full year in writing. Call (831) 318-8819 for a free estimate from a crew that knows Hercules roof conditions firsthand.
Why Brennan Roofing Co San Francisco Is Hercules’s Preferred Roofing Company
Hercules homeowners call us because the problems on their roofs don’t match what flatland roofers expect. The terraced hillsides above Refugio Valley catch west wind off the bay in a way that Pinole and Rodeo streets never do. Led by Travis Oakley, our crews have walked enough of these roof lines to know where sealant strips fail first, where underlayment splits along the eaves, and what code upgrades a permit triggers once an old roof comes open.
Every technician we dispatch to Hercules is background-checked and arrives in uniform. Every job starts with a written price, before any work begins. And when the job is done, the 365-Day Done Right Promise covers it in writing: if a repair or installation fails within one year, we return and make it right at no charge. That’s the Garrison Standard, and it applies on every roof we touch in Hercules.
Brennan Roofing is an independently owned member of the Garrison Partners family, founded in 2000. We’re not a faceless chain working Hercules from a call center. Dispatch and scheduling run from our Bay Area office, and the crews who arrive at your door are the ones doing the work on your roof.
Styles & brands we work with
Roofing Contractor in Hercules
A Roofing Contractor in Hercules does more than nail shingles down. On these hillside lots, a competent contractor evaluates how wind and bay moisture have worked on your decking, underlayment, and flashing before recommending any repair or replacement. A typical roof repair for a Hercules home runs $450 to $1,800 depending on what’s damaged. A full roof replacement on a single-family detached home here generally lands between $11,000 and $24,000, with concrete tile and standing seam metal on the steeper hillside subdivisions pushing toward the upper end.
Roof Repair
Most repair calls in Hercules start with a ceiling stain that shows up after a winter storm. We trace the leak, open what needs opening, and fix it with materials matched to your existing system. Repairs average $450 to $1,800, and you get the price in writing before we touch the roof.
Roof Replacement
When a 1980s composition shingle roof has reached the end of its life, replacement is the honest fix. We quote architectural shingle and tile systems for Hercules homes between $11,000 and $24,000, depending on slope, decking condition, and the system you choose. The number is written down before work starts.
Commercial Roofing in Hercules
Commercial Roofing in Hercules covers the retail, office, and mixed-use buildings scattered along San Pablo Avenue and the newer commercial pads near the waterfront. These buildings carry flat or low-slope membrane roofs, modified bitumen, or metal standing seam, and they need a contractor who understands drainage and bay wind exposure on a larger scale. Commercial roof repairs in Hercules typically run $1,200 to $6,000 depending on membrane type and damage area. Full commercial roof replacement or restoration generally falls between $18,000 and $60,000.
Flat Roof Systems
For flat and low-slope commercial buildings, we install and repair membrane systems built to shed water and handle ponding that comes with heavy bay rains. Written pricing applies the same on commercial work as it does on residential.
Metal Roof Systems
Standing seam metal on Hercules commercial buildings gives decades of service and handles wind load well. We inspect seams, clips, and penetrations, and quote any repair or full metal install in writing before work begins.
Trusted Brands We Service in Hercules
We install and repair materials from GAF, CertainTeed, and Owens Corning, among others. For Hercules homeowners, that means you’re not limited to whatever a contractor has left in a yard. We source what fits your roof, whether it’s architectural shingles from GAF, tile from a leading line, or metal from a manufacturer with a proven wind rating. We keep a local network of suppliers for fast turnaround on common parts, so a repair on a 1980s shingle roof doesn’t wait while someone ships a special-order ridge cap across the country.
Common Roofing Company Problems We See in Hercules Homes
- Wind-lifted shingle tabs on west-facing slopes. On the terraced hillsides above Refugio Valley, original 1980s shingle roofs lose their sealant strips over decades of onshore wind. The tabs lift, the adhesive fails, and the first real winter storm drives water underneath into the house.
- Split underlayment along the eaves. Bay wind doesn’t just lift shingles; it works the underlayment where it’s folded over the drip edge. Once that barrier splits, moisture tracks down into soffits and living room ceilings, even if the shingles still look intact from the ground.
- Missing ice and water shield at valleys and penetrations. Original 1980s crews often left ice and water shield off the valleys and around pipe boots and chimney flashings. On older Hercules homes, those unsealed points are where water gets in first.
- Decking damage hidden under old shingles. When we tear off a roof on a wind-exposed Hercules lot, we often find decking that’s warped or split along the eaves. Reusing that decking means the new shingles ride the same waves and leak at the first storm.
See the difference
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AfterPricing for Roofing Company in Hercules, CA
What does roof work actually cost in Hercules? Here are straight numbers. Minor repairs like replacing a few shingles or re-sealing a vent boot run $350 to $700. Mid-size repairs involving flashing, underlayment patches, or small sections of decking land between $900 and $2,200. A full roof replacement on a typical 1970s-1990s hillside single-family home with architectural shingles runs $12,000 to $19,000. Concrete tile replacement runs $21,000 to $30,000. Metal standing seam runs $24,000 to $38,000. The single biggest price mover is what we find after tear-off: decking that needs replacement, missing underlayment, framing that has to be brought to current code. With us, every surprise is priced and approved in writing before we touch it. Call (831) 318-8819 for a free estimate.
We Also Serve Cities Near Hercules
Beyond Hercules, our crews work regularly in El Cerrito, Benicia, Martinez, and Albany. If your home sits near the bay in one of those cities, the same written pricing and 365-Day Done Right Promise apply. Call (831) 318-8819 and talk to a live person about what’s happening on your roof.
Serving Hercules, CA - Our Local Coverage Area
We’re based in the Hercules 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 Hercules
The leaks come from wind-lifted tabs and split underlayment that open only under storm pressure. On Hercules’s terraced hillsides above Refugio Valley, onshore wind has worn away the sealant strips on original composition shingles. The tabs lift enough to let water drive underneath when rain hits from the west, but they lie flat and dry during summer, so the roof looks fine from the ground. If you’re seeing ceiling stains only in winter, the roof likely has hidden wind damage at the eaves or valleys. Call (831) 318-8819 for an inspection and a written quote.
Yes, on hillside Hercules homes, ice and water shield belongs at the eaves, in valleys, and around penetrations regardless of snow. Wind-driven rain from San Pablo Bay pushes water uphill along the roof deck. Ice and water shield is the only underlayment that seals around the nails and stops that water. On a 1982 split-level above Refugio Valley, we found split underlayment at the eaves and moisture trailing into the living room ceiling. We laid new ice and water shield from the drip edge to the first valley before anything else went down. It’s cheap insurance compared to tearing out a finished ceiling.
When you pull a permit to replace a roof on a 1970s or 1980s Hercules home, the inspector checks that the roof assembly meets current building code. That often means adding or upgrading venting, re-nailing decking to modern spacing, and sometimes reinforcing framing where a previous roofer cut corners. An unpermitted roofer won’t mention any of this until the inspector shows up, if the inspector ever does. We build these code fixes into the written price before we start, so the quote you sign is the work you get. Call (831) 318-8819 for a quote that actually holds.
Check the flashing at the ridge, the tile-to-wall transitions, and any cracked tiles near the eaves. Concrete tile systems hold up well, but the metal flashing underneath them corrodes over time from bay air. Cracked or slipped tiles expose that flashing to wind-driven rain, and leaks start. We inspect tile roofs across the newer Hercules hillside subdivisions and quote any needed flashing or tile replacement in writing. Call (831) 318-8819 to schedule a pre-winter inspection.
The honest roofer includes decking replacement when the wood is actually damaged. Cheaper quotes often skip decking entirely, reuse the old boards, and then nail new shingles over warped, wind-lashed plywood. The new shingles telegraph the same waves and leak at the first storm. On the hillsides above Refugio Valley, we find split or warped decking along the eaves often enough that we inspect every board at tear-off. If it’s damaged, we replace it, and the cost is written into the contract before the first nail goes down. Call (831) 318-8819 and ask us to look at your decking estimate line by line.
Get a Written Price Before Any Work Starts
If your Hercules roof is leaking, lifting, or simply at the end of its life, the next step is a free estimate from a crew that knows this city’s roof conditions. Led by Travis Oakley, Brennan Roofing Co San Francisco operates under The Garrison Standard: written pricing before any work starts, background-checked uniformed technicians, and a 365-day written guarantee on every job. Call (831) 318-8819 today and talk to a live person. No voicemail, no callback queue, no pressure. Just a straight answer about your roof.
Written by Travis Oakley, Owner at Brennan Roofing Co San Francisco, serving Hercules and the surrounding Bay Area.