Owens Corning
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Owens Corning Roofing in San Francisco, CA | Brennan Roofing Co San Francisco
We provide independent Owens Corning roofing service in San Francisco, from the Sunset to Bernal Heights. What makes our work different here is simple: we understand how TruDefinition Duration, Oakridge, and Woodmoor shingles actually fail under coastal fog, wind-driven rain, and the weight of a Victorian roof that’s been standing since 1910. Call (831) 318-8819 for a free estimate and we’ll put the price in writing before any work starts.
Why San Francisco Residents Choose Us for Owens Corning Service
Travis Oakley, owner of Brennan Roofing Co San Francisco, grew up in the San Gabriel Valley and learned roofing through the construction technology program at East Los Angeles College before moving his operation north. Since then, he and our crews have worked hundreds of San Francisco roofs, from flat torch-down on Sunset District flats to steep Victorian shake replacements near Alamo Square. Travis reads a roof honestly. He’ll tell you what needs replacing now, what can wait two seasons, and what a salesman might oversell you on. That matters because Owens Corning service isn’t just about knowing shingle lines. It’s knowing which slopes in which neighborhoods fail first and why. We’re an independent service provider, not a manufacturer affiliate, and we answer to you, not a corporate warranty department. We operate under The Garrison Code: written price before any work starts, background-checked uniformed technicians, and a full-year written guarantee on every job.
Styles & brands we work with
Common Owens Corning Roofing Problems We Solve in San Francisco
- Blow-offs on exposed western facades. Duration shingles with tab edges that lift during winter storms are common on homes facing the Pacific. Wind-driven rain gets under the leading edge faster than the sealant can recover. We see this most on Outer Sunset and Outer Richmond streets where the storm track hits dead-on. The fix starts with the decking, not just the shingle.
- Moss and algae colonization on north slopes. In neighborhoods like the Richmond and Sunset, shaded northern and western slopes stay damp for months and grow moss in the shadow lines of Oakridge and Woodmoor architectural shingles. That growth undermines the nailing strip and accelerates granule loss. We treat it, then fix the drainage that feeds it.
- Premature sealant failure over original wood shingle decks. This is a San Francisco classic. Duration shingles installed over old cedar shingle decks don’t get full adhesive contact because the surface is uneven. Wind gusts between row houses make the shingles flutter, the sealant breaks down, and the shingles lift. The right fix is a new uniform deck, not more sealant.
- Flashing corrosion at chimneys and skylights. Salt-laden fog condenses on flashings and runs down, corroding them even when the Owens Corning shingles themselves are intact. We replace those flashings with heavier-gauge materials that hold up better in the marine layer. This is a penetration problem, not a shingle problem.
- Vent boot failures driving water into top-floor ceilings. Old rubber vent boots crack and let wind-driven rain into bedrooms on the top floor. We replace them with cast aluminum boots and add ice-and-water shield where the eaves have been weeping. Fixing the boot is a small job. Waiting until the decking rots is not.
Owens Corning Service in San Francisco: What Local Conditions Mean for Your Roof
Here’s a fact most roofing pages won’t tell you. On a single San Francisco block in the Richmond, all the original 1910s cedar shingle roofs were replaced by different contractors over roughly twenty years. The only Owens Corning roofs still holding their sealant along the drip edge are the ones where the decking was replaced to create a uniform nailing surface instead of shingling over the old wood. That’s not a shingle defect. It’s a decking decision made decades ago. In San Francisco, the persistent heavy fog rolling in from the Pacific means those old decking decisions eventually come due. A roof can look sound from the curb while the bottom three feet of shingles near the gutter are curling and lifting after every winter because moisture wicked up from a rotting eave. If you own an Owens Corning roof in the Sunset or Richmond, the condition of the decking under the drip edge is the single best predictor of whether your shingles will hold through the next storm cycle. A good roof shouldn’t need to be talked about – it should just hold.
Owens Corning Models & Products We Service in San Francisco
We work on the full Owens Corning residential shingle line: TruDefinition Duration, Oakridge, Woodmoor, and Berkshire. When a roof repair in San Francisco calls for color-matching, we source genuine Owens Corning shingles from local roofing supply houses in the Bay Area. When underlayment or flashing spec is the issue, we’re not shy about using a better aftermarket product if it outperforms the original or if San Francisco code requires it. What we keep on hand locally are the accessories that fail most often in this climate: vent boots, pipe collars, valley metal, and drip edge. That means we can usually complete a vent boot or flashing repair the same visit without waiting on a supplier in Hayward or across the bridge. For full replacements, we order the exact Duration or Oakridge color and have it delivered to the job site days before the tear-off starts.
See the difference
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Honest pricing starts with knowing what you’re paying for before the first shingle comes off. Here are the line-item ranges we typically work within for Owens Corning repair work in San Francisco:
- Vent boot replacement: $275 – $450 per boot, depending on roof pitch and access
- Chimney or skylight flashing repair: $600 – $1,400 depending on the extent of corrosion and masonry condition
- Localized shingle replacement (up to one square): $450 – $900 including color matching and disposal
- Full decking replacement (per 4×8 sheet, where needed): $95 – $135 installed
- Complete Owens Corning Duration roof replacement on a typical two-story Victorian: $14,000 – $28,000 depending on slope count, decking condition, and access
Those are ballpark numbers. Your written estimate is exact and free. Call (831) 318-8819 and we’ll walk your roof, take measurements, and hand you a price on paper. That price does not move at the door.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 – Owens Corning Roofing in San Francisco
Granule loss concentrated on the north slope is almost always moss and algae colonization, not a manufacturing defect. The north slope stays shaded and damp from San Francisco fog for months at a time, which lets moss roots work into the granule surface and loosen it. We treat the moss, repair any shingles with exposed nailing strips, and often recommend a zinc or copper strip to slow regrowth. Call (831) 318-8819 and we’ll let you know if it’s a repair or a reshingle on that slope only.
Yes, in most cases. We source genuine Owens Corning Duration shingles in the original colorway from local supply houses. If that exact color has been discontinued, we’ll show you the closest current match and get your sign-off before ordering. A 2008 roof will have some fading, so a perfect match is rare, but a clean repair beats leaving the damaged section open to fog and rain. Call (831) 318-8819 for a free estimate and we’ll identify the color.
Rain coming in at the top-floor ceiling usually points to a penetration problem, not a field shingle problem. Chimney flashing, vent boots, and skylight curbs are the typical weak points on San Francisco Victorians and Edwardians. We trace the leak from the inside stain outward, then inspect the flashing and boot above it before touching any shingles. If the flashing is corroded from salt fog, we replace it. If the shingles around it are fine, we leave them alone. Call (831) 318-8819 and we’ll find where the water is actually getting in.
Yes. On steep slopes we use roofing jacks and harnesses, and we work with flat bars designed to break the sealant bond without tearing adjacent shingles. We remove the damaged shingle, replace it with a genuine Owens Corning match, and re-seal the tabs. If the roof is too fragile to work on without making things worse, we’ll tell you that straight and give you a written replacement option instead. Call (831) 318-8819 for a free estimate on a localized replacement.
Usually not. Curling along the drip edge is typically a sign of moisture wicking up from a rotting or uneven deck at the eave, which is common on older San Francisco homes where the original decking was never replaced. The shingles can’t lay flat because what’s under them is moving. We replace that eave decking, then re-shingle with matching Owens Corning shingles. If the decking is sound, we’ll look at ventilation and underlayment. Call (831) 318-8819 for an exact diagnosis and a written price.
Service Areas Near San Francisco
We cover all of San Francisco, from the Outer Richmond to Bayview, and we regularly run crews to Owens Corning service in Hayward, Owens Corning service in Berkeley, Daly City, San Leandro, and Walnut Creek. If you’re within the Bay Area, call us. If we can’t get to you quickly, we’ll say so and point you to someone who can. For a full look at our coverage, see our San Francisco service area page.
Book Your Owens Corning Service in San Francisco Today
If your Owens Corning roof is leaking, lifting, or losing granules on a fog-bound slope, don’t wait for the next storm to find the gap. Call (831) 318-8819 and we’ll schedule a free estimate, inspect the roof in person, and put the price on paper before any work starts. You can also learn more about our broader Owens Corning sales & service. Phones are answered by a live person, around the clock. No voicemail, no callback queue.
Written by Travis Oakley, Owner at Brennan Roofing Co San Francisco, serving San Francisco since moving his operation north from Los Angeles. Contact: (831) 318-8819.