Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roof Installation Across Martinez
A new roof in Martinez typically costs between $9,800 and $24,000 depending on the size of your home, the materials you choose, and what our crew finds when the old roof comes off. That’s the honest range, and it’s what you should expect before calling anyone in the 94553. We know Martinez roofs differently than a company running jobs out of Concord or Walnut Creek. The Carquinez Strait winds, the salt fog, the refinery air, and the age of homes near the downtown core all change what a roof installation actually requires here. If you’re planning a Roof Installation and want a written price before any work starts, call (743) 200-8347. We’ll send a real person, and you’ll know exactly who’s coming to your door before they arrive.
Why Mercer Roofing Is Martinez’s Preferred Roof Installation Company
Homeowners in Martinez call us because they want to know who’s walking up their driveway before the knock happens. Every Mercer technician is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge. We send you their name and photo before the visit. That’s the Threshold Verified standard, and it’s contractually required of every location in the Threshold Group family. Grant Whitlock leads our Martinez roofing work, and he holds every job to that standard. Founded in 2000, Mercer Roofing is part of the Threshold Group family of home-service companies, and each location is independently owned and operated.
Martinez homeowners consistently tell us the same thing: they’ve had roofers show up late, skip the details, or leave them guessing about what the invoice will say. We do the opposite. Every project starts with a written price. No work begins without it, and the number on the quote is the number on the invoice unless you approve a change order in writing first. If we find hidden damage under your old roof, you’ll see the exact cost and sign off before we touch it. That’s how we protect homes on Alhambra Avenue, out near Hidden Lakes, and up in the hills above Virginia Hills.
TPO Roofing Installation in Martinez
TPO Roofing Installation in Martinez is a common request for flat and low-slope sections of homes, particularly on mid-century additions and detached garages throughout the city. TPO, which stands for thermoplastic polyolefin, is a single-ply membrane that gets heat-welded at the seams. The welding matters in Martinez because the Carquinez Strait delivers wind-driven rain that finds every weak seam eventually. A properly welded TPO roof sheds that water and holds up against the Delta breeze better than older torch-down systems. In Martinez, a TPO installation on a typical garage or low-slope addition runs $7,500 to $14,000 depending on square footage and whether the existing decking underneath is sound.
When TPO Makes Sense Here
Flat roofs on older Martinez homes often have original tar-and-gravel or aging modified bitumen that’s reached the end of its life. TPO is lighter weight and reflects heat well, which helps on the flat roof sections that bake in Contra Costa sun between fog cycles.
What the Installation Involves
We pull the old membrane or roofing material, inspect the decking beneath, and replace any rotted or delaminated sections before laying the new TPO. Around Martinez, we pay extra attention to perimeter edge metal because the wind here works on those edges constantly.
Shingle Roof in Martinez
A Shingle Roof in Martinez is the most common installation we do, and the cost ranges from $11,500 to $24,000 for an average-sized home. That range reflects what we find once the old roof opens up. Many Martinez homes, especially the Victorians and Craftsman bungalows built between the 1890s and the 1930s, were originally sheathed with wood skip boards spaced two inches or more apart. You cannot install modern composition shingles directly over skip sheathing. The gaps mean fasteners miss solid wood, and the shingles eventually sag and lift. We install a full layer of 7/16-inch OSB or plywood decking over the skip boards first. That cost is real, and we write it into your price as soon as we can confirm it.
Shingle Choices That Hold Up Near the Strait
We install manufacturer-recognized shingle brands including GAF, CertainTeed, Owens Corning, Atlas, and Tamko. For Martinez homes on exposed north- and west-facing roof planes, we recommend a shingle with a strong wind rating and a granule composition that resists the refinery airborne particulates that accelerate wear here.
What Replacement Includes
Every shingle roof installation includes new underlayment, new flashing at penetrations and valleys, drip edge, and proper ventilation. We do not reuse old flashing on Martinez homes. The salt fog from the strait corrodes galvanized metal faster than most homeowners expect, and new flashing is cheap insurance against leaks.
Trusted Brands We Service in Martinez
We install and repair shingle systems from GAF, Atlas, and Tamko, along with other manufacturer-recognized brands. What that means for a Martinez homeowner is simple: you get a roof backed by a real manufacturer warranty, installed by a crew that’s trained on that product’s specific fastening and ventilation requirements. We keep common flashing profiles, ridge caps, and starter strips in stock for the Martinez market, which helps us move faster when a roof plane is opened and we find something that needs immediate replacement. You won’t wait a week for parts to arrive from a warehouse. And every material we install carries a written guarantee from Mercer Roofing covering the workmanship for 365 days. If it’s not right within a year, we make it right.
Common Roof Installation Problems We See in Martinez Homes
- Original skip sheathing under historic shake roofs. On 1890s to 1930s homes in the downtown core, pulling back worn wood shake often reveals spaced boards with gaps of two to three inches. These cannot support modern shingles or tile without a new solid decking layer, which changes both the scope and the honest price.
- Granule loss from refinery airborne particulates. The PBF Energy refinery within city limits releases petrochemical particulates and sulfur compounds that measurably accelerate asphalt shingle granule loss. Exposed planes facing the prevailing wind fail years before the same product would in cleaner-air East Bay cities.
- Corroded nail heads and rusted flashing on north- and west-facing planes. The Carquinez Strait sends salt-laden fog into Martinez most mornings. That wet-dry cycle rusts galvanized flashing and corrodes fastener heads faster than what roofers see even a few miles inland in Lafayette or Pleasant Hill.
- Mid-century tract roofs past their design life. The hillside and suburban neighborhoods built through the 1950s, 60s, and 70s brought a wave of composition shingle roofs now well beyond twenty-five years. Many of those homes are on their second or third roof, and the decking beneath was often marginal from the start.
Pricing for Roof Installation in Martinez, CA
Roof installation in Martinez runs $9,800 to $24,000 for most single-family homes. A simple tear-off and re-shingle on a mid-century rancher might land near the lower end if the decking is solid and the roofline is simple. A downtown Victorian with a steep, complex roofline, original skip sheathing, and historic review requirements can push toward or beyond the upper end. TPO on a flat or low-slope section runs $7,500 to $14,000. What moves the number: decking condition, roof pitch, number of planes, flashing complexity, and whether historic review adds requirements. Every Mercer Roofing project starts with a written line-item price. You approve any change in writing before we touch it. Call (743) 200-8347 to schedule a free estimate. There’s no obligation, and you’ll know exactly what you’re looking at.
We Also Serve Cities Near Martinez
Mercer Roofing serves homeowners throughout Martinez and the surrounding East Bay communities. If you’re in Pleasant Hill, Benicia, Lafayette, or Concord and need a roofing team that shows a photo ID at the door and puts every price in writing, call us. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, and crews serve Martinez and nearby cities locally.
Serving Martinez, CA - Our Local Coverage Area
We’re based in the Martinez 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 Installation in Martinez
Yes, in many cases. Homes within Martinez’s historic downtown review area, particularly the Victorian and Craftsman properties built from the 1890s through the 1930s, may be subject to Contra Costa County historic review before a roof installation can proceed. That review can affect material choices and sometimes requires preserving original roofline details. We recommend checking with the City of Martinez Building Division early in your planning. We’ll help you understand what applies to your specific address before you spend a dollar. Call (743) 200-8347 and we’ll talk through it.
Martinez sits directly on the Carquinez Strait, which funnels strong Delta breezes through the city at wind speeds that routinely exceed those in Concord or Pleasant Hill. That wind causes shingle blow-off, lifted flashing, and fastener fatigue. On top of the wind, the PBF Energy refinery within city limits releases airborne petrochemical particulates that accelerate asphalt shingle granule loss. The result is that roofs on exposed planes in Martinez simply wear out faster than the same product would a few miles inland. Call (743) 200-8347 for a free assessment of your roof’s condition and an honest estimate for replacement.
The biggest surprise is original wood skip sheathing under old shake roofs. On 1890s to 1930s homes in the downtown core and surrounding historic blocks, the original roof decking is often spaced boards with gaps of two inches or more. Modern shingles and tile cannot be installed directly over those gaps. A full layer of solid OSB or plywood decking has to go down first, and that’s a material and labor cost that most homeowners don’t expect when they start collecting quotes. We watch for it on every Martinez tear-off and we write the cost into your change order the moment we can confirm it. Call (743) 200-8347 for a quote that accounts for this before we ever set foot on your roof.
We handle it with written approval before we touch anything. When our crew opens an older Martinez roof and finds rotted decking, skip sheathing, failed flashing, or anything else that requires additional work, we stop and document it. You get a written change order with the exact cost. Nothing proceeds until you sign off. On the 1912 Victorian in the downtown core near the historic review area, our crew pulled worn wood shake to find original skip sheathing with gaps up to three inches. We installed a full layer of 7/16-inch OSB decking over the skip boards, then applied GAF ice and water shield in the valleys and along the eaves before laying architectural shingles with a starter strip and ridge vent. The homeowner approved the decking change order in writing before we touched the old roof, so there were no surprises on the final invoice. That’s how every Martinez job works. Call (743) 200-8347 to start with a free estimate.
Look for a shingle rated for at least 110 mph wind speeds, and preferably 130 mph on exposed planes. Martinez gets stronger sustained Delta breezes than most of inland Contra Costa County, and north- and west-facing roof planes on the Carquinez Strait catch the worst of it. A shingle with a strong wind rating plus a properly installed starter strip and correct fastening pattern will hold up far better than a budget product. We’ll spec the right wind rating for your specific roof orientation and give you the written price before any work starts. Call (743) 200-8347 to schedule your free estimate.
Ready to Replace Your Martinez Roof? Start With a Written Price.
You don’t have to guess what a new roof in Martinez will cost. You don’t have to open your door to a stranger and hope for the best. Mercer Roofing sends you the technician’s name and photo before they arrive. They badge in with a photo ID at the door. And every job starts with a written line-item price. If it’s not done right within 365 days, we make it right, backed by a written guarantee. Call (743) 200-8347 to schedule your free estimate. A live person answers, 24/7, and they’ll talk you through your options without pressure.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Martinez and the East Bay.