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 San Anselmo
Finding a Roofing Company in San Anselmo that understands the town’s older hillside homes isn’t a small thing. Most of the housing stock here went up between 1910 and 1950, which means the roofing problems we see are repeatable, and the solutions are, too. We’re Mercer Roofing, and we’ve been doing this work since 2000 as part of the Threshold Group family. Our crews serve San Anselmo directly, coordinated from the brand’s San Francisco Bay Area office. If you’re looking at a roof repair or a full shake-to-Class-A conversion, call us at (743) 200-8347 for a free estimate.
Why Mercer Roofing Is San Anselmo’s Preferred Roofing Company Company
Homeowners in San Anselmo tell us the same thing again and again: they want to know exactly who is walking up their driveway. We handle that directly. Every Mercer technician is background-checked, identity-verified, and dispatched under the Threshold Verified standard. Before your technician arrives, we send their name and photo to you. At the door, they present a photo ID badge and arrive in a clean, marked uniform. That’s not a courtesy. It’s the core of how we work.
Our reputation in San Anselmo is built on written pricing and written guarantees. Before any work starts, you get a line-item price in writing. Every repair includes a written guarantee, and if it fails within 365 days, the second visit is free. We don’t ask you to take that on faith. It’s in the paperwork. Grant Whitlock leads our team, and the standard he sets is this: if it’s not done right, we make it right. That’s the 365-Day Done Right Promise, and it’s been the backbone of this company for over two decades.
We know San Anselmo’s particular roofing challenges: the fog-channeling valley, the redwood needles and oak leaves that pile up in gutters, the steep hillside lots off Sir Francis Drake Boulevard, the CAL FIRE High Fire Hazard Severity Zones that run through neighborhoods like Sleepy Hollow and the hills above Crescent Drive. A roofer who doesn’t know this town will miss things. We don’t.
Metal Roof Installation in San Anselmo
Metal Roof Installation in San Anselmo is most often driven by two things: the fire-zone requirement for Class A material, and the desire to never think about the roof again for 40-plus years. On a hillside Craftsman or Colonial Revival, a standing-seam metal roof can satisfy CAL FIRE requirements outright. The question is whether the aesthetic works for the home. We handle that conversation honestly, because a metal roof on a 1920s bungalow is a different look than on a modern addition off Butterfield Road.
What it involves: removing the old roof, evaluating the decking, replacing any deteriorated skip-sheathing or narrow rafter framing, installing high-temperature underlayment for the fire zone, then the metal panels or shakes. The cost in San Anselmo runs $18 – $30 per square foot installed, depending on the profile and whether we’re dealing with a low-slope section that requires special detailing.
What you get for the price
Every metal roof we install includes a written price before work starts, a written guarantee on the installation, and our 365-Day Done Right Promise. We also walk you through the material warranty. You’ll know exactly what’s covered and for how long, in plain English, before you sign anything.
Standing seam versus shake-profile metal
We install both, and the choice usually comes down to your home’s architecture and what a Marin design-review board will accept. Standing seam is durable and visually straightforward. Shake-profile metal, from brands like Boral, gives you the Class A fire rating with the silhouette of the original wood shake. That second option is a common request on hillside streets above the valley floor.
Residential Roofing in San Anselmo
Residential Roofing in San Anselmo means working with wood-frame homes built between roughly 1910 and 1950, most with moderate-to-low roof pitches originally engineered for wood shake or early composition shingles. When we strip an old roof on a home near San Anselmo Avenue or in the flats around the creek, we regularly find original skip-sheathing decking that’s too deteriorated to re-nail. That means the job expands, and it should be priced for that reality from the beginning.
A full residential re-roof in San Anselmo typically runs $14 – $22 per square foot for an architectural shingle system, including necessary decking repair, new underlayment, and flashing replacement. It’s a real number. The variables are roof access, pitch, number of layers being removed, and whether we discover framing issues once everything is off.
What we find in San Anselmo homes
The most common surprise is the decking. Narrow rafter spacing from early framing methods, combined with decades of trapped moisture, means sections of plywood or planking have to come out. We write a decking-replacement allowance into every re-roof contract so you’re not hit with an unexpected change order. If the actual replacement exceeds the allowance, you’ll know before we proceed, and the price is approved in writing.
When to replace versus repair
If the roof is under 15 years old and the problem is isolated, a repair makes sense. If the roof is past 20 years, showing granule loss across broad areas, or leaking in multiple places, the math favors replacement. We’ll give you an honest assessment either way, with the costs spelled out so you can compare them.
Trusted Brands We Service in San Anselmo
We work with manufacturer-recognized shingle brands including GAF, CertainTeed, Owens Corning, IKO, Atlas, and Tamko. For San Anselmo’s shake-profile needs, we also install Boral composite and steel shake products that satisfy Class A fire requirements while preserving the look of the original wood. Because we know what this market demands, we keep the most requested profiles and colors available for fast turnaround. You won’t wait weeks for a material order that every other contractor in Marin is also waiting on.
Common Roofing Company Problems We See in San Anselmo Homes
- Rotted skip-sheathing decking on pre-WWII homes: The original planking on many 1910 – 1950 San Anselmo roofs was never designed for multiple re-roofs. When we strip the old material, the decking often can’t hold new fasteners, and it has to be replaced before anything else goes down.
- Valley flashing failures above San Anselmo Creek: The creek’s flooding history is tied to roof drainage failures. A blocked downspout or a deteriorated valley flashing sends water where it shouldn’t go, and in this fog-channeling valley, the debris load makes the problem worse.
- Moss and granule loss from redwood needle accumulation: Redwood needles and oak leaf matter pile up on roofs and in gutters faster than in drier Marin towns. We see valley clogging, moss growth at the eaves, and accelerated granule loss on homes throughout the hills and flats.
- Wood shake roofs that no longer meet fire code: Nearly every original wood shake roof we encounter in San Anselmo’s High Fire Hazard Severity Zones is due for Class A conversion. The challenge isn’t just the material. It’s matching the period-appropriate look that Marin homeowners and design-review boards expect.
Pricing for Roofing Company in San Anselmo, CA
Roof repair in San Anselmo typically runs $450 – $1,800 depending on the leak source, the extent of decking damage, and how difficult the access is. A full replacement on a standard Craftsman runs $14 – $22 per square foot. A metal roof installation runs $18 – $30 per square foot. A shake-profile Class A conversion sits near the top of that range because of the material cost and the decking work that usually accompanies it. Anything that changes the scope gets priced and approved in writing before we proceed. Call (743) 200-8347 to schedule a free estimate and get a written, line-item price.
We Also Serve Cities Near San Anselmo
Our Roofing Company in San Anselmo work takes us into the surrounding Marin communities on a regular basis. We serve Fairfax, Kentfield, San Rafael, and Larkspur with the same written pricing, badge-at-the-door standard, and 365-Day Done Right Promise. If you’re in one of those towns and have questions, call (743) 200-8347 and a live person will answer.
Serving San Anselmo, CA - Our Local Coverage Area
We’re based in the San Anselmo 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 San Anselmo
Because the homes were built between 1910 and 1950 with original skip-sheathing and narrow rafter spacing that were never meant to carry this many re-roofs. When the old material comes off, we regularly find decking too deteriorated to hold fasteners, and sometimes framing members that show moisture damage requiring repair or reinforcement. We handle this by writing a decking-replacement allowance into the contract before we start, and any additional scope is priced and approved in writing before we touch it. Call (743) 200-8347 for a free estimate that accounts for this reality from day one.
If your home sits within one of San Anselmo’s CAL FIRE-designated High Fire Hazard Severity Zones, then yes, a re-roof must use Class A fire-rated material. That includes most of the hillside neighborhoods, including areas off Crescent Drive and the steeper streets above the valley floor. We can help you confirm your property’s designation and work through the material options. Call (743) 200-8347 and we’ll walk you through what applies to your specific address.
On a San Anselmo remodel, opening walls often triggers electrical upgrades like GFCI and AFCI protection, smoke and carbon monoxide detector updates, and sometimes seismic retrofitting of the roof-to-wall connections. If we’re replacing the roof as part of that remodel, we coordinate with your other trades so the roofing work meets current code for fire-rated underlayment and ventilation. We price the roofing portion in writing before we begin, and we don’t proceed with any additional scope without your written approval. Call (743) 200-8347 to talk through your project.
The short answer is that we treat the causes, not just the symptoms. We clear and reflash valleys so water moves, replace deteriorated flashing, and recommend gutter and downspout configurations that reduce the redwood needle and oak leaf buildup that accelerates moss and granule loss. The goal is a roof that drains cleanly, because failed roof drainage is a direct contributor to the water-damage cycle around San Anselmo Creek. Call (743) 200-8347 for an assessment.
Yes. Shake-profile composite and steel products from brands like Boral meet the Class A fire requirement and replicate the wood shake silhouette closely enough to satisfy most design-review boards and homeowners who want the period-appropriate look. We recently installed GAF Timberline UHDZ shake-profile shingles in a brownwood tone on a 1920s Craftsman off Crescent Drive, and it worked. Call (743) 200-8347 to discuss what would work for your home.
What It’s Like to Work With Us in San Anselmo
On a hillside block off Crescent Drive, our crew tore off three layers of failed wood shake from a 1920s Craftsman and found the original skip-sheathing decking too deteriorated to re-nail. We replaced it with 1/2-inch CDX plywood, added ice and water shield in the eaves and valleys, new drip edge, and GAF Timberline UHDZ shake-profile architectural shingles in a brownwood tone. The Class A conversion satisfied the fire zone requirement, and the shake-profile silhouette satisfied the owner’s design expectations. That’s the balance we strike on every San Anselmo project: code compliance first, period-appropriate aesthetics second, and written pricing throughout.
If you’re considering a roof repair, a full replacement, or a shake-to-Class-A conversion on your San Anselmo home, call (743) 200-8347 for a free estimate. A live person answers, 24/7. You’ll get a written price before any work starts, a written guarantee on every repair, and a technician whose name and photo you’ll know before they arrive.
Written by Grant Whitlock, Owner at Mercer Roofing, serving San Anselmo since 2000.