Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Installation Across Rohnert Park
A full roof installation in Rohnert Park typically runs $14,000 to $28,000 for a standard single-story ranch, with tear-off, decking repair, ventilation retrofit, and architectural shingles included. Most jobs here take three to five working days once materials are staged. If you’re weighing a roof replacement on a 1960s or 70s tract home in the numbered sections, call (743) 200-8347 for a written estimate before any work starts.
We know this city’s housing stock cold. The overwhelming majority of Rohnert Park single-family homes are single-story and split-level ranch-style tract houses with low-slope rooflines, often 3:12 pitch or less, built between roughly 1958 and 1975. That means we’re not guessing at what’s under your shingles. We already know what we’ll find, and we scope for it before quoting.
Why Mercer Roofing Is Rohnert Park’s Preferred Roof Installation Company
Rohnert Park homeowners keep calling us back for a simple reason: nobody else in Sonoma County sends you the name and photo of the technician before they arrive. Every Mercer technician is background-checked, identity-verified, and walks up to your door in a clean, marked uniform with a photo ID badge. That’s the Threshold Verified standard, and it’s non-negotiable. When we say a real person answers the phone at (743) 200-8347 at 2 a.m., we mean it. You won’t get a voicemail tree.
Founded in 2000, Mercer Roofing is part of the Threshold Group family. Each location is independently owned and operated, and Rohnert Park jobs are coordinated through our San Francisco Bay Area office with crews serving Rohnert Park locally. Grant Whitlock leads our team, and he holds every job to one standard: a written price before any work starts, a written guarantee on every repair, and our 365-Day Done Right Promise. If the work isn’t right within a year, we make it right. That’s the whole promise, in writing.
Standing Seam Metal Roof in Rohnert Park
Standing Seam Metal Roof installation in Rohnert Park is the right call when you’re done fighting the moisture that rolls through the Petaluma Gap and sits on low-pitch ranch rooflines for days at a time. Standing seam uses interlocking vertical panels with concealed fasteners, which gives you nothing exposed for fog, moss, or lichen to grab onto. On a 3:12 or lower slope, a properly installed standing seam roof will shed water faster than any shingle system, and it won’t trap moisture against the deck the way composition shingles do on north- and west-facing planes.
For a typical 1,600 to 2,200 square foot Rohnert Park ranch, expect $26,000 to $44,000 for a full standing seam roof with tear-off, new underlayment, and drip edge. That’s the range we quote when no structural surprises hide underneath. If you’re on acreage in the unincorporated parts of the city’s edge, we also account for long material hauls and crane access when we build your number.
Low-Slope Performance and Venting
Standing seam on a 2:12 or 3:12 pitch in Rohnert Park means we have to get the venting path right, because the panels themselves aren’t the only thing keeping your deck dry. We’ll spec a continuous ridge vent and add intake at the soffits if your original 1960s build never had one. A metal roof over an unventilated deck still traps attic heat, and the metal will simply radiate it back into the house. The roof has to breathe, or the manufacturer’s warranty doesn’t hold.
What Stands Up to the Fog
The Petaluma Gap pushes fog across the Santa Rosa Plain nearly every day, which means standing moisture on the north and west slopes of Rohnert Park homes. Moss and algae take root fast on wood or composition surfaces. A standing seam roof has no granular surface for moss to bite into, which is why we’re recommending it more often to homeowners on the west side of town near Roberts Lake Road and up toward the L-section.
Tile Roof in Rohnert Park
Tile Roof installation in Rohnert Park is a strong choice for homeowners who want a roof that looks substantial and lasts decades, but only if the structure beneath it is ready. Clay and concrete tile are heavy. Most 1960s and 70s Rohnert Park ranch homes were framed for composition shingles, not tile. Before we quote tile, we check the rafter spacing and sheathing condition, because adding 600 to 900 pounds per square to a roof that was never engineered for it is a recipe for sagging or worse.
Expect $24,000 to $42,000 for a full tile roof installation in Rohnert Park, including tear-off, structural reinforcement where needed, new underlayment, and tile installation. We work with Atlas, Boral, and Tamko tile profiles, and we’ll show you samples before you commit to anything. Every price is written, line by line, before a single tile comes off the pallet.
Reinforcement Before Tile Goes Up
We’re not going to lay tile over decking that’s been holding Petaluma Gap moisture for five decades. Tear-off on an original Rohnert Park roof frequently reveals delaminated 1×6 or soft plywood at penetrations, valves, and chimney flashing. We replace what’s compromised, then check the underlayment spec. Tile needs a high-performance underlayment rated for the marine air this part of Sonoma County gets. We’ll show you exactly what’s on the quote.
Air Space and Attic Heat
Tile roofs in Rohnert Park need an air gap, and the easiest way to get one is a batten system over the underlayment. That gap lets the fog that settles on the tile surface dry out without transferring moisture into the attic. It also gives attic heat a way to move toward the ridge, assuming you have the ventilation. On a 1965 original that never had ridge or soffit vents, we address that before tile goes up, because a tile roof over a dead attic just bakes.
Trusted Brands We Service in Rohnert Park
We install and repair shingle and tile systems from GAF, CertainTeed, Owens Corning, Atlas, Tamko, IKO, and Boral. For Rohnert Park homes, the most common asks we see are GAF Timberline HDZ and CertainTeed Landmark architectural shingles, plus Boral and Tamko tile profiles for homeowners who want a heavier look. We stage materials locally, which means fewer delays when you’re in the middle of a re-roof and the Petaluma Gap fog window is making everything damp. Parts and underlayment we need for a typical Roof Installation in Rohnert Park are either on the truck or a short drive away from our Bay Area staging yard, so a three-day job doesn’t stretch into five over a box of missing ridge caps.
Common Roof Installation Problems We See in Rohnert Park Homes
- Overlay bids over original 1960s decking. A straight overlay on a Rohnert Park home from section A, B, or C usually hides soft sheathing and rot at pipe boots, chimney flashing, and valley metal. When we tear off and find it, the price moves. Get that written into your bid up front, or get surprised later.
- No ventilation path from soffit to ridge. The pre-1975 builds in the numbered sections often have zero intake and exhaust. Shingle manufacturers void warranties on unventilated decks, full stop. We scope every Rohnert Park installation as a ventilation retrofit unless we verify an existing path.
- Moss and lichen on low-pitch north and west planes. Petaluma Gap moisture doesn’t just sit on the surface. It wicks under shingle edges and into the deck. We’ve pulled up roofs in the M and N sections where the plywood was visibly black with mildew but the shingles on top looked fine from the street.
- Drainage scoped only to the roof plane. On larger lots and acreage, water sheets off the roof and has nowhere to go because nobody looked at grading around the fascia. We check that the ground slopes away from the structure before we sign off, especially around detached shops and ADUs.
Pricing for Roof Installation in Rohnert Park, CA
A full tear-off and architectural shingle installation on a standard Rohnert Park ranch runs $14,000 to $28,000. Standing seam metal lands between $26,000 and $44,000. Tile, with reinforcement, runs $24,000 to $42,000. What pushes a Rohnert Park quote higher: rotted decking replacement (we budget $3 to $5 per square foot for sheathing), ventilation retrofit, and structural reinforcement on homes where the original rafters were never specced for heavier materials. We give you a written line-item price before we start, and that’s the number on the invoice. No change orders unless you approve a scope change in writing. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Rohnert Park
Our Roof Installation team covers the surrounding Sonoma County communities from Cotati and Petaluma through Santa Rosa and Sebastopol. If you’re outside Rohnert Park proper on a rural parcel or a planned development near the city edge, we’ll scope the job the same way: written price, photo ID at the door, and a roof that can handle Petaluma Gap air.
Serving Rohnert Park, CA - Our Local Coverage Area
We’re based in the Rohnert Park 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 Rohnert Park
If your parcel is in unincorporated Sonoma County, you pull a Sonoma County permit; if you’re inside Rohnert Park city limits, the city handles it. We determine which jurisdiction applies before we quote, and we pull the permit on your behalf. The permit cost is listed on your written estimate, and we don’t start work until it’s issued. Call (743) 200-8347 with your parcel number and we’ll tell you which side of the line you’re on.
Architectural shingles are generally rated down to 2:12, but on a 3:12 or lower Rohnert Park roof we’ll often recommend standing seam metal because the Petaluma Gap moisture lingers longer on low slopes. Shingles can work if we install a full ice and water shield underlayment and correct the ventilation. We’ll give you the honest recommendation based on your roof plane, and the written quote will show both options if you want to compare. Call (743) 200-8347 and we’ll walk the roof with you.
The fog sits on the north and west planes longer than any other face, which means the deck under those shingles stays damp for hours after the rest of the roof is dry. That’s where moss takes hold, where shingles curl at the edges, and where we find mildew-stained sheathing during tear-off. A roof with good ventilation dries out from underneath. A roof without it rots from underneath. We scope every Rohnert Park roof for that exact condition.
Yes, we roof detached shops, outbuildings, and ADUs on Rohnert Park acreage as part of the same job. That means one mobilization, one written price, and one permit if both structures fall under the same jurisdiction. We check well and septic setbacks before we place any equipment, because those setbacks dictate where material can be staged and where we can’t drive. Tell us what’s on the property when you call (743) 200-8347, and we’ll scope the whole parcel, not just the house.
Ask every bidder to show the square count and the line-item breakdown, not just a total. A square is 100 square feet of roof surface. If one bid says 22 squares and another says 28 for the same Rohnert Park ranch, someone measured wrong or someone is padding. We hand you the roof measurement, the decking condition notes, the ventilation scope, and the material list in writing. Compare line by line. If a bid looks too low, look for what’s missing, usually ventilation or decking replacement.
If you’re in Rohnert Park and you want a roof installation quote that covers the decking, the ventilation, the drainage, and the people who show up at your door, call (743) 200-8347. The estimate is free. The technician’s name and photo arrive before they do. And the price you’re quoted is the price you pay, in writing, before a single nail goes in.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Rohnert Park and Sonoma County.