Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across Alum Rock
Roof repair in Alum Rock runs $350 – $1,800 for most jobs, with simple shingle replacement and leak patches at the low end and flashing or decking replacement at the high end. We’re on Alum Rock roads every week, and we know the housing stock here: modest single-story ranch homes and stucco bungalows from the 1950s through the 1970s, many with composition shingle roofs that have been patched and layered over time. If you’re seeing water stains on the ceiling in your Alum Rock home, call (669) 238-2101. A live person answers, and we’ll get a technician out to look at the roof before a small leak becomes a structural problem.
Travis Oakley leads our crew, and the standard we work to is the same on every job: written price before any work starts, background-checked uniformed technicians on your roof, and a full-year written guarantee on every repair.
Why Brennan Roofing Co San Jose Is Alum Rock’s Preferred Roof Repair Company
Alum Rock homeowners tend to have a good sense for when a roofer is wasting their time. We don’t. Our Roof Repair team works this neighborhood steadily, and we’ve been on enough Alum Rock roofs to know what the east side throws at them: sun-baked shingles, raccoon damage near the foothills, and leaky built-in gutters on the older ranch homes.
Every job starts with a written price in hand. No work begins until you have that number on paper, and the number does not move at the door. That’s the Garrison Standard, and it’s not a sales pitch. It’s the operating discipline Travis Oakley runs our crews under, every day, on every roof.
We’re an independently owned and operated member of the Garrison Partners family, founded in 2000. That means local accountability with a defined standard behind it. When we say a technician will show up in uniform, background-checked, inside the promised window, that’s what happens.
Styles & brands we work with
Emergency Roof Repair in Alum Rock
Emergency Roof Repair in Alum Rock is what we dispatch first when a raccoon has torn open an attic vent, a branch has punctured the decking, or a downpour has found a way through a failed flashing joint. The job is to stop water entry immediately, then make the permanent repair properly. Most emergency roof repairs in Alum Rock run $450 – $1,800 depending on what opened up and how much decking or underlayment has to be replaced.
Animal Entry and Eave Damage
East-side homes near the foothills get raccoon pressure that flatland San Jose rarely sees. The animals tear open vents and soffits just before the winter rains, and water follows the opening straight into the insulation. We repair the entry point, replace damaged decking, and seal the eave so it doesn’t happen again next season.
Storm and Wind Response
When a winter storm lifts shingles or sends a tree limb through the roof, the first step is temporary protection. Tarp and seal, then schedule the permanent repair with the same crew. The 365-Day Done Right Promise applies to emergency work too, in writing, for one full year.
Flat Roof Repair in Alum Rock
Flat Roof Repair in Alum Rock almost always traces back to one of two things: an addition or carport built with a low slope and marginal drainage, or an older built-up roof that’s been patched too many times. Most flat roof patches here run $500 – $1,900. The price depends on whether we’re repairing a seam or replacing a section of membrane and the underlying decking.
Low-Slope Carports and Additions
We see a lot of owner-build carports and additions on Alum Rock ranch homes where the roof slope was built just barely enough to shed water. When the slope is too low, water ponds, and the seams open up. We repair the membrane, correct the drainage where possible, and make sure the roof-to-wall flashing doesn’t create a new leak.
Built-Up and Modified Bitumen Repairs
Older flat roofs on 1950s and 1960s homes here were often built up with tar and gravel, and many have been coated or patched in layers. We find the active leak, open the roof down to dry decking, and patch with compatible material. The written price covers the full repair, and if it fails within the year, we come back free.
Trusted Brands We Service in Alum Rock
We install materials from GAF, CertainTeed, and Tamko, and we’ll explain the real differences between them without pushing you toward the priciest option. If your Alum Rock roof has existing shingles from a specific manufacturer line, we can match color and profile in most cases. We stock common flashing, vent boots, and shingle bundles locally, which means a faster turnaround when you’re already dealing with a leak over the living room.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Repair Problems We See in Alum Rock Homes
- Built-in gutter rot on low-pitch ranch roofs. The 1950s and 1960s ranch homes on the east side were often built with integral gutters at the eave. Years of overflow rot the fascia and roof edge, and the decking underneath goes soft. By the time you see the stain on the ceiling, the repair usually includes decking replacement.
- Raccoon damage at vents and eaves. This is the Alum Rock signature. Homes near the foothills get repeated raccoon entry through attic vents and eaves, especially on east-facing roofs. The animals open a path for rain in exactly the wrong place, and the leak that follows is not subtle.
- Failed step flashing on additions. Additions and carports built without proper step flashing at the roof-to-wall intersection leak only during prolonged rain. It’s a capillary path, not an open hole, which makes it slow to show and easy to misdiagnose. We check every roof-to-wall transition first on any Alum Rock repair call.
- Sun-cracked shingles and lost granules. Alum Rock’s hot, dry summers bake asphalt shingles until they crack and lose their granular surface. By the time the winter rains arrive, the shingles are brittle and the roof is ripe for leaks at the penetrations and valleys.
Pricing for Roof Repair in Alum Rock, CA
Here’s what you can expect to pay for roof repair in Alum Rock, on paper, before any work starts:
- Shingle replacement: $350 – $650 for a standard repair, more if the damaged area is on a steep slope or hard to access.
- Leak repair: $400 – $900 depending on what’s leaking and how long it’s been running.
- Flashing repair: $450 – $1,100, because the old flashing usually has to be cut out and the surrounding shingles lifted and re-seated.
- Flat roof patch: $500 – $1,900, with the high end covering membrane section replacement and decking repair.
- Vent boot repair: $300 – $550 per boot, including new sealant and any shingle lifting needed.
- Valley repair: $600 – $1,400, since valleys take the highest water flow on any roof and usually need new underlayment and metal.
The price is set before we start, and it does not move at the door. Call (669) 238-2101 for a free written estimate on any of these repairs.
We Also Serve Cities Near Alum Rock
Our crews serve the whole east side and beyond, including San Jose, Sunnyvale, Redwood City, and Union City. If you’re in any of these cities and need the same written-price, background-checked standard, we cover you there too.
Serving Alum Rock, CA - Our Local Coverage Area
We’re based in the Alum Rock 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 Alum Rock
Roof repairs that replace existing materials like shingles, flashing, or decking generally fall under the permitted roofing rules for San Jose, but properties on acreage with detached structures can trigger county-level review when the structure is large, habitable, or tied to septic setbacks. The simplest rule: if the repair is limited to replacing like for like on the main house, San Jose handles it. If you’re reroofing a detached ADU, shop, or barn on acreage, county involvement is possible. We pull the right permit for every job and check the structure type before quoting. Call (669) 238-2101 and we’ll tell you what applies to your property.
Septic and well setbacks don’t stop us from repairing your roof, and they don’t add cost to the roof work itself. What they can change is where equipment and material staging can be placed on the lot. On larger properties with septic leach fields or wellheads near the house, we keep trucks and debris trailers off those zones by design. It’s a simple logistics point, but it keeps your system undamaged and the county inspector happy. We’ll ask about septic and well locations when we scope any acreage job.
Long material hauls to foothill properties typically add $75 – $200 to the delivery portion of a repair job, depending on distance, road conditions, and whether we’re bringing up full pallets of shingles or just a few bundles of flashing and underlayment. The repair labor price doesn’t change. We quote the delivered price in writing before work starts, so there’s no surprise line item. Call (669) 238-2101 for a written estimate that includes haul costs to your address.
Yes, and it matters. A detached structure on acreage usually has a different roof slope, different structure under the decking, and different local exposure than the main house. A shop or barn roof is often lower-slope, unvented, and more open to wind load at the eaves. We scope each structure separately because the failure modes are different, and the repair is different as a result. The written price reflects each building’s actual condition, not a blended guess.
Open-lot grading and drainage mostly affect how water moves once it leaves the roof, not the roof repair itself, but the two are connected. On acreage with significant slope, we check that the repair won’t shed water into an area that drains back toward the foundation or into a septic field. When we scope a repair on a sloped lot, we look at how the roof drains to the ground, and we’ll flag any grading issue that’s likely to undermine the repair. That’s part of the written estimate, not a hidden add-on.
Written by Travis Oakley, Owner at Brennan Roofing Co San Jose, serving Alum Rock and the surrounding east side communities.