Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Repair Across San Pablo
Roof repair in San Pablo means dealing with what the Carquinez Strait fog does to a 75-year-old roof. Most homes here were built fast, between 1940 and 1955, for Richmond shipyard families. The board sheathing under those shingles has spent decades soaking up marine moisture, and when a San Pablo homeowner calls us, the visible damage is usually the smallest part of the problem. We know these houses. We know what hides under the shingles on Rumrill Boulevard, on Dover Avenue, off San Pablo Avenue, and up in the 94806 hills. Call (743) 200-8347 and we’ll send a technician whose name and photo you’ll have before he rings the bell.
Why Mercer Roofing Is San Pablo’s Preferred Roof Repair Company
Since 2000, Mercer Roofing has worked on the exact housing stock San Pablo is built from: small wood-frame bungalows and ranches with original board sheathing, shallow pitches, and decades of deferred maintenance. Part of the Threshold Group family, our San Pablo crews are background-checked, identity-verified, and dispatched under the Threshold Verified standard. Every technician arrives in a clean, marked uniform with a photo ID badge at the door. You’ll know who is coming before they arrive, because we send the name and photo ahead of the visit.
Homeowners in San Pablo tell us the same thing: they didn’t realize how much rot was under the shingles until someone actually looked. Our Roof Repair team starts every job with a decking inspection, not a shingle count. We write the price before work starts, and that price includes a written guarantee on the repair. If it fails within 365 days, we come back and make it right. That’s the Done Right Promise, in writing, on every job.
Grant Whitlock leads our San Pablo crews, and he’s the one who makes sure the quote you approve is the price you pay. No change order gets slipped in after tear-off. If we find rotted decking that wasn’t visible from the driveway, we stop, show you the board, price the replacement, and get your written approval before touching it. That’s how a roof repair should work in a city where the houses hide surprises.
Shingle Roof Repair in San Pablo
Shingle Roof Repair in San Pablo is rarely just about shingles. What starts as a few missing tabs after a winter windstorm is often the symptom of decking that has been wet for years, held damp by the marine layer that rolls through the Carquinez Strait nearly every summer morning. A typical shingle repair in San Pablo runs $340 to $680. A full shingle replacement on a standard 1,000 to 1,200 square foot bungalow, with decking repairs as needed, falls between $9,400 and $13,800. The decking is the variable, and we’ll show you exactly what we find before we quote it.
Tear-off and Decking Assessment
When we lift shingles on a 1948 bungalow, we expect to find 1×6 board sheathing that has gone punky along the north plane. We inspect every board before re-covering. That’s the difference between a roof that lasts and one that rots from underneath.
Flashing and Valley Work
San Pablo’s shallow-pitch roofs concentrate water at valleys and walls. We repair and replace flashing with the same care as the field shingles, and we seal penetrations with the right underlayment for this damp climate.
Storm Damage Roof Repair in San Pablo
Storm Damage Roof Repair in San Pablo usually follows the winter wind events that push through the Golden Gate and hit the western Contra Costa shoreline. January and February bring gusts that lift shingles, tear flashing, and send tree limbs onto roofs in the 94806 and Richmond-adjacent blocks. A minor storm repair, like replacing a few lifted shingles and resealing a vent, costs $380 to $650. A wind-torn section with damaged decking can run $1,100 to $2,400. We document everything for your insurance claim and give you a written repair price that holds.
Tarp and Temporary Cover
When a storm opens your roof to the weather, we can get a water-tight tarp in place quickly, and the repair price includes that temporary cover. No surprises on the invoice.
Insurance-Ready Documentation
We photograph the damage, mark the affected area, and write up the repair scope in plain language that works with your adjuster. It’s a repair, not a claim fight.
Trusted Brands We Service in San Pablo
We install and repair the shingle brands San Pablo homeowners ask for by name: GAF, CertainTeed, and Owens Corning. For decking, underlayment, and flashing we use materials matched to the damp coastal conditions of the Carquinez corridor, not whatever is on the shelf at the warehouse. Our crews keep common repair materials staged for San Pablo jobs, so a missing bundle doesn’t mean a two-day delay. And because we see so many moss-covered north planes here, we keep zinc moss-inhibitor strip in stock as a standard item, not a special order.
Common Roof Repair Problems We See in San Pablo Homes
- Fog-driven moss on north and west slopes. This is not a cosmetic issue. Thick moss holds moisture against shingles and decking, accelerating rot on homes that already have 75-year-old board sheathing. The fix is physical moss removal, then zinc strip installation along the ridge.
- Punky 1×6 and 1×8 board sheathing. San Pablo’s 1940s and 1950s houses were built quickly, with narrow boards that warp and rot after decades of marine-layer dampness. Shingles nailed to punky board have nothing to hold to.
- Deferred maintenance on older bungalows. With high renter density and compressed household incomes, roofs here often go years between repairs. What looks like a small leak is frequently advanced underlayment failure by the time we’re called.
- Bad flashing at original chimneys and vents. Original flashing on these homes is thin, rusted, and often improperly stepped. We replace it as standard practice on every repair, not as an add-on.
Pricing for Roof Repair in San Pablo, CA
Here are honest San Pablo numbers. A small leak repair, like resealing a vent boot or patching a small flashing gap, runs $300 to $520. A mid-sized shingle replacement over a section of rotted decking costs $700 to $1,600. A larger repair that opens up a valley, replaces decking boards, and re-flashes a chimney lands between $1,800 and $2,900. Full re-roofs on San Pablo bungalows, with board replacement as needed, run $9,400 to $13,800. The price moves based on what we find under the shingles. We’ll show you the wood, quote you the fix, and get your written sign-off before we cut anything. Call (743) 200-8347 for a free estimate, written and itemized.
We Also Serve Cities Near San Pablo
Our San Pablo crews regularly handle Roof Repair in the neighboring communities of El Sobrante, Richmond, Pinole, and El Cerrito. The same marine-layer conditions, the same 1940s and 1950s housing stock, and the same fog-fed moss problems appear across the corridor, so we already know what your roof is dealing with. Call us from any of these nearby cities and we’ll schedule the same written-price repair visit we do in San Pablo.
Serving San Pablo, CA - Our Local Coverage Area
We’re based in the San Pablo 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 Repair in San Pablo
Because your roof’s decking was wet and rotted under the shingles. San Pablo homes sit in a fog corridor that keeps board sheathing damp for months each year, so 75-year-old boards under apparently fine shingles are often soft. We don’t shingle over punky wood. We show you the rotted board, price the replacement, and get your written approval before we proceed. The original quote was for what we could see. The revised quote is for what we found when we opened the roof. Call (743) 200-8347 for a repair that starts with an inspection, not a guess.
North-facing slopes in San Pablo rarely see direct sun, and the summer fog that flows through the Carquinez Strait keeps them damp well into the afternoon. Moss and lichen thrive on that cool, shaded moisture. South-facing slopes dry out, so they stay cleaner. The fix isn’t just removal. We install zinc moss-inhibitor strips along the ridge, and every future rain carries a small amount of zinc down the roof to keep moss from returning. It’s a standard line item on San Pablo re-roofs, not an upsell.
Not always, and we won’t tell you it does just to run up the bill. Some original board sheathing is still solid, especially on south and east slopes that dry out. But in San Pablo’s fog belt, north plane boards are often spongy. We test every board with a probe, and we show you what we find. If it holds a fastener and doesn’t mushroom when probed, it stays. If it’s punky, it gets replaced with new CDX plywood and the price is written and approved before we cut.
In most cases, yes. Wind-lifted shingles, torn flashing, and even a small section of deck damage from a fallen limb can be repaired without a full re-roof. We re-secure the field, replace the damaged boards, and match the shingle color as closely as the existing roof allows. What we won’t do is patch over widespread granule loss or shingles that are already near the end of their life. If a full replacement is the honest recommendation, we’ll tell you that and give you a written price.
Compare decking. Ask each bidder what happens if they find rotted board sheathing after tear-off. Do they have an allowance in the price? Will they show you the wood? Will they get written approval before replacing it? A San Pablo bid that doesn’t mention decking is a bid that’s planning to either shingle over rot or hit you with a surprise change order. Our written price includes a stated allowance for board replacement, and we walk you through every board we replace. Call (743) 200-8347 for a quote that’s written the same way we’d want it written for our own roof.
On a 1948 bungalow off Rumrill Boulevard, our crew pulled architectural shingles that looked repairable from the driveway and found the original 1×6 board sheathing soft and punky along the north plane from decades of marine-layer moisture. We replaced the rotted decking, laid new ice and water shield at the valleys and penetrations, set a zinc moss-inhibitor strip along the ridge, and closed it out with new drip edge and starter strip before the homeowner ever saw a shingle go back down. That’s the job in San Pablo, and it’s the job we do every week.
Mercer Roofing serves San Pablo and the nearby communities of El Sobrante, Richmond, Pinole, and El Cerrito. Dispatch and scheduling are coordinated from our San Francisco Bay Area office. Founded in 2000, every location is independently owned and operated under the Threshold Verified standard. If you need Roof Repair in San Pablo, call (743) 200-8347. A live person answers, 24/7, and your free estimate comes with a written price before any work starts.
Written by Grant Whitlock, Owner at Mercer Roofing, serving San Pablo and the wider Bay Area since 2000.