Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roof Repair Across San Bruno
Roof repair in San Bruno usually costs between $350 and $1,900 depending on what’s actually going on up there, and most jobs we handle are done in a single day. That’s the honest range before anyone walks your roof. The bigger question in San Bruno isn’t typically the price. It’s whether the crew on the other side of your door knows how this city’s wind works. We do. Call (743) 200-8347 and you’ll get a live person who can schedule a free estimate with a technician whose name and photo you’ll receive before they arrive.
Why Mercer Roofing Is San Bruno’s Preferred Roof Repair Company
We’ve worked on enough San Bruno roofs to know the failures here don’t look like the failures in Millbrae or Brisbane. The wind in the San Bruno Gap does its own thing, and it tears up roofs in a pattern most out-of-town crews miss entirely. Homeowners here tell us they’ve had roofers walk the job, quote a price, and never mention that the northwest slope was failing twice as fast as the southeast side. We name what we see, and we put the price in writing before any work starts. Every repair includes a written guarantee, and our 365-Day Done Right Promise means if the work isn’t right within a year, we come back and make it right at no charge.
Every Mercer technician is background-checked, identity-verified, and badged. Before your appointment, we send the technician’s name and photo to your phone. When they knock, they’ll be in a clean, marked uniform with a photo ID in hand. That’s the Threshold Verified standard, and it’s how every independently owned Mercer location operates. For San Bruno homeowners who are home alone with young kids or getting older and want proof of who’s at the door, that badge-at-the-door promise is the difference.
Founded in 2000, Mercer Roofing is part of the Threshold Group family of home-service companies. We answer the phone 24/7 with a real human being, not a voicemail tree. When your roof is leaking into the living room at 9 p.m., you don’t want a callback form.
Storm Damage Roof Repair in San Bruno
Storm damage roof repair in San Bruno is rarely about a single catastrophic event. It’s usually the accumulated effect of Gap-driven wind lifting ridge caps, hip shingles, and starter strip at the eave edge over the course of two or three winter seasons. By the time a homeowner sees a shingle in the yard, the northwest plane has often been losing fasteners quietly for months. A typical storm damage repair on a San Bruno tract home runs $500 – $1,400, depending on how much field shingle has to be re-nailed or replaced and whether the decking underneath has started to soften.
What We Check After Every Big Wind
Ridge caps and hip shingles get priority. Then we walk the eave line for pulled starter strip and check the flashing at any penetration, pipe vent, or valley. On San Bruno hillsides above El Camino Real, we also look for the asymmetric granule pattern: one slope nearly bare, the other still holding color. That’s how we know where the wind has been concentrating.
Written Price Before Any Work Starts
After the inspection, you get a written line-item price. No work begins until you approve it. If we open the roof and find something underneath that changes the job, we stop and price that change in writing before touching it. You’ll never get a surprise invoice from us.
Metal Roof Repair in San Bruno
Metal roof repair in San Bruno is less common than shingle work, but plenty of homes here have metal over porches, carports, and bay windows, and a handful of newer rebuilds along Crestmoor have full standing-seam panels. Metal roofs fail differently than composition shingles. The panels themselves usually hold, but the fasteners back out under repeated wind-lift cycles, the neoprene washers crack, and the joints start to weep. A typical metal roof repair in San Bruno runs $400 – $1,200, with most of that going to labor and the specific sealants and fasteners the panel profile requires.
Wind-Lift on Metal Panels
The same Gap wind that pries shingles loose pulls at metal panel fasteners too, especially on the northwest-facing slopes above San Andreas Lake. We re-torque or replace the fasteners, inspect the clips for fatigue, and re-seal the laps. If the panel itself is creased from wind flutter, we’ll quote a panel replacement separately.
Flashing and Penetration Leaks
On metal roofs, most leaks happen at the flashings, not the panels. Skylight curbs, vent pipes, and chimney transitions are the usual spots. We pull the old sealant, inspect the flashing for rust-through, and re-set everything with a sealant rated for marine air exposure. San Bruno’s fog means cheap caulk fails in two years. We use materials built for that environment.
Trusted Brands We Service in San Bruno
We install and repair shingles from GAF, CertainTeed, and Atlas, and we keep common profiles in stock for San Bruno customers so we’re not waiting on a distributor while your roof is open. If your home already has a certain brand and color on one plane, we’ll match it. GAF and CertainTeed architectural shingles hold up well in San Bruno’s wind when installed to spec, and Atlas makes a solid storm-rated option for the more exposed hillside exposures. We’re manufacturer-recognized for the brands we install, which means the warranty paperwork is real and enforceable, not a promise that evaporates when the crew drives off.
Common Roof Repair Problems We See in San Bruno Homes
- Wind-lift fatigue on ridge caps and hip shingles. The San Bruno Gap channels northwest wind through the city at measurably higher speeds than Millbrae or South San Francisco. Ridge caps let go years before the field shingles show wear, and homeowners don’t always notice because the damage isn’t visible from the driveway.
- Moss and algae bloom on north- and west-facing slopes. The marine layer stalls over San Bruno and keeps those roof planes damp well into summer mornings. Moss traps moisture against the shingle mat, hiding granule loss underneath until the shingle is already failing.
- Asymmetric granule loss between two slopes on the same house. The northwest plane gets sandblasted by wind-driven rain while the southeast plane stays protected. We’ve seen houses on hillside streets above El Camino Real where one slope is bare mat and the other looks five years old. Out-of-town crews price both slopes the same and miss the damage entirely.
- Flashing fatigue at valleys and penetrations. Wind-driven rain on the exposed slope forces water sideways into the flashings, not just down the roof. Over time, the metal fatigues, the sealant cracks, and the leak starts as a small ceiling stain that gets repainted twice before anyone calls us.
Pricing for Roof Repair in San Bruno, CA
Here’s what you can expect to pay in San Bruno for common repairs: shingle replacement runs $350 – $900 on a standard tract home, leak repair typically lands between $450 and $1,200 depending on access and whether decking is involved, flashing repair is usually $400 – $800, flat roof patches run $500 – $1,000, vent boot replacement is $250 – $500, valley repair costs $600 – $1,400, and storm damage repairs land between $500 and $1,400. Metal roof repairs run $400 – $1,200. What moves the number is what we find when we open the roof. That’s the honest answer. Every estimate is free, and the price goes in writing before any work starts.
We Also Serve Cities Near San Bruno
Mercer Roofing serves homeowners across the northern Peninsula. In addition to San Bruno, our Roof Repair team works in Millbrae, South San Francisco, Pacifica, and Brisbane. If you’re close to the San Bruno border in any of those cities, you can still reach us at (743) 200-8347. We’ll let you know honestly if you’re better served by our San Bruno crew or one of our neighboring routes.
Serving San Bruno, CA - Our Local Coverage Area
We’re based in the San Bruno 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 Bruno
Ridge caps and hip shingles sit at the highest and most exposed edges of the roof, and the San Bruno Gap drives northwest wind directly across those edges with more force than the surrounding flatlands get. The wind pries at the fasteners on the cap row every time it blows, and that concentrated lift loosens them years before the field shingles, which are lapped and pressing flat against each other, show any sign of trouble. Call (743) 200-8347 and we’ll inspect the cap row and tell you exactly what’s loose before it becomes a leak inside the house.
It’s very normal, and it’s usually not about when the roofs were installed. It’s about which way each house faces. The northwest-facing planes get hit with the Gap’s wind-driven rain, which strips granules and fatigues flashings far faster than the protected southeast planes. On hillside streets above El Camino Real, we’ve opened northwest slopes where the mat is showing through while the southeast slope on the same house looks years younger. That’s the fingerprint of Gap-channeled wind, and it only shows up if you know to look for it. Estimates are free, and we’ll price both slopes based on what we actually see.
Yes. The marine layer that stalls over San Bruno keeps roof decks damp into the morning for much of the year, which shortens the dry window for adhesive-set underlayment and shingle installation compared to cities just a few miles inland. If a crew installs self-adhered underlayment on a damp deck, the bond fails and the whole assembly is compromised. We schedule San Bruno work around the morning marine layer and verify deck moisture before we lay anything down. That’s not a detail most roofers think about. It’s one of the reasons we tell San Bruno homeowners to call us rather than a crew that doesn’t know the local conditions. Reach us at (743) 200-8347.
That happens regularly on San Bruno’s post-WWII tract homes. The decking on wind-exposed slopes has often been damp for years, and when we pull shingles, we find plywood that needs replacing. The same goes for the occasional outdated wiring run near a soffit or eave on a house that hasn’t been opened up since the original build. We handle it with an inspection-first allowance written into the contract, so you know before we start exactly how much a decking replacement or wiring adjustment will add if it’s needed. If we find something that changes the scope, we stop and price it in writing before touching it. You approve everything. Nothing gets added to your invoice that you didn’t sign off on.
Most repair work, like shingle replacement, flashing repair, valve boot replacement, and valley work, does not require a permit in San Bruno. Structural changes, like replacing large sections of decking or re-framing a roof plane, may require one depending on the city’s current codes. If a permit is required, we pull it and schedule inspections. If the inspector flags something outdated that’s exposed once the roof is open, we’ll quote that upgrade in writing and you decide before any additional work happens. For most repairs on San Bruno homes, you’ll get a straightforward written price and a same-day fix with no permit involved. Call (743) 200-8347 and we’ll tell you what your specific job needs before you commit to anything.
Written by Grant Whitlock, Owner at Mercer Roofing, serving San Bruno and the surrounding Peninsula since 2000.