Architectural shingles
Metal roofing
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 San Francisco
If you’ve spotted a ceiling stain off a skylight or a soft spot by the chimney, you’re in the right place. San Francisco roofs take a particular kind of beating: fog on the west side, steady rain from November through March, and row houses built in the 1880s to 1930s with original shingles and shared walls. We know what that combination does to a roof, and we know which repairs actually hold through the next wet season. Call (855) 473-8840 to book a free estimate.
Why San Francisco Homeowners Call Sunstone Roof Repair for Roof Repair
Sunstone Roof Repair runs on three services, in order: Roof Inspection, Roof Repair, Roof Replacement. That sequence matters here. In a city where a neighbor’s roof is six inches from yours, the honest answer is sometimes “you need a repair,” sometimes “you need new decking under three courses,” and sometimes “you need nothing this year.” An inspection should give you answers, not a sales pitch. We’ll tell you exactly what your roof needs – repair, replacement, or nothing at all.
San Francisco homeowners are careful researchers, and we respect that. Many have already been quoted a full replacement for a problem that starts at a failed flashing detail. Our technicians have up to 12 years of experience opening up layered roof assemblies on Victorian and Edwardian homes, and we work with materials from seven manufacturers – GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral – so we can match a repair section to what’s already on your roof rather than selling you a whole new system. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.
Styles & brands we work with
- Architectural shingles
- Metal roofing
- Tile roofing
- GAF
- Owens Corning
- Flat & low-slope
Emergency Roof Repair in San Francisco
Emergency Roof Repair in San Francisco usually means water is coming in now – a stain spreading across a ceiling, a drip at a skylight during the first heavy rain of the season, or a chimney flashing failure that’s sending water behind the underlayment. The job starts with stopping the intrusion: clearing the penetration, checking the decking beneath for rot, and rebuilding flashing and drip edge so the next storm doesn’t get behind it. A typical emergency repair of this kind runs $450 – $1,400 depending on whether decking has to be replaced once the assembly is open. Call (855) 473-8840; we answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. The written estimate sets the final price.
Tracing the Source of the Leak
Water on a steep Victorian roof rarely lands where it enters. It runs along framing and underlayment before it shows up as a ceiling stain two rooms away. We open the assembly at the suspect penetration and check the decking and underlayment beneath the surface layer, not just the top course.
Making the Repair Weathertight
Once the source is confirmed, we rebuild the flashing and drip edge and replace any decayed wood before re-covering the section. Proper kick-out flashing at the wall intersection is the detail that keeps the same spot dry next November.
Flat Roof Repair in San Francisco
Flat Roof Repair in San Francisco almost always involves an overbuild: a flat tar-and-gravel layer laid over old steep shingles, or a small penthouse added at the rear of a row house, both of which create hidden valleys and penetrations where water pools. That layered construction is where roofers find trouble, because the old assembly underneath keeps failing while the top layer looks serviceable. A typical flat roof patch or small repair runs $600 – $1,900 in the San Francisco market, and a larger rebuild of a rear flat section can run $3,500 – $7,000 once insulation and decking are included. Every quote is free and line-item. Call (855) 473-8840 for yours.
Layered Overbuilds and Hidden Valleys
When a tar-and-gravel layer sits over original steep shingles, water can pool at the transition and travel sideways under the membrane. We map the layers before opening anything, so the repair targets the actual low point.
Ponding and Drainage
San Francisco’s rainy season will find any dip in a flat section. Adding slope where it’s practical and re-detailing drains keeps water moving off the roof instead of sitting on it through the winter.
Trusted Brands We Service in San Francisco
We work with materials from Owens Corning, IKO, Atlas, and Tamko, alongside GAF, CertainTeed, and Boral, which means we can repair a section and match it to what’s already on your roof instead of insisting on a whole new system. Familiarity with multiple manufacturer systems is the practical difference on a San Francisco row house, because replacement sections have to integrate with existing shingles, underlayment, and flashing details that weren’t designed for today’s products. We don’t claim to stock parts locally – materials are sourced per job, so the correct product arrives for your roof rather than whatever happens to be sitting in a warehouse. That keeps turnaround tight and the repair honest. Choose from seven of the industry’s most trusted shingle and roofing material brands, and let the inspection decide which one fits.
Common Roof Repair Problems We See in San Francisco Homes
- Cedar shingles rotted from underneath. In the Sunset and Richmond districts, the marine layer keeps roofs damp for long stretches, so original cedar and redwood shingles can decay from the underside while the top course still looks sound. Surface-only repairs tend to fail again within a season.
- Failed flashing at chimneys and skylights. The rainy season from November through March puts constant pressure on penetration details, and once water gets behind the underlayment it rots decking well before anyone notices a leak inside.
- Party wall and firewall continuity problems. Victorian and Edwardian row houses share party walls, so repairs often need access through a neighboring building and compliance with SFFD and DBI rules on firewall continuity that a detached-house market never faces.
- Moss and rot between courses. Damp fog air feeds moss growth in the gaps between shingles, and moss holds moisture against the wood. Left alone it accelerates rot and lifts shingle edges, which lets the next storm in.
See the difference
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After
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After
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AfterPricing for Roof Repair in San Francisco, CA
Roof repair in San Francisco typically runs $450 – $1,400 for a targeted leak or flashing repair, $600 – $1,900 for a flat roof patch on an overbuilt section, and $3,500 – $7,000 when a rear flat roof or a large section needs decking and insulation replaced along with the cover. Those ranges reflect the San Francisco market specifically, where party-wall access, historic façade considerations, and permit-triggered code upgrades all add labor that a suburban job never carries. The number that moves a quote is what’s under the surface layer. Underside shingle rot, failed underlayment, or damaged framing only show up once the assembly is open, which is why we open it before quoting and write a line-item estimate. Estimates are free. Call (855) 473-8840.
How We Keep a Repair Quote From Moving
In San Francisco’s west-side fog belt, original cedar shingles routinely rot from the underside out, so a roof that looks intact from the street can hide decay beneath the top course. That’s the single biggest reason a repair quote changes, and it’s why we don’t quote a number we haven’t verified. We inspect and open the assembly first, write allowances for decking and framing replacement into the contract where the risk is real, and price any surprise we find in writing for your approval before we touch it. On a row house, repair work frequently needs access through a neighboring building and SFFD and DBI firewall continuity compliance – details that have to be planned, not discovered mid-job.
Here’s how a typical San Francisco row house repair usually goes. A homeowner notices a ceiling stain near a chimney or skylight after the first heavy rain of the Nov – Mar season. The usual cause is failed flashing at a penetration, with moss and rot working under the shingles in the damp marine layer. A qualified local roofer opens the assembly, checks the decking and underlayment beneath the surface layer, replaces decayed wood, and rebuilds the flashing and drip edge before re-covering – often coordinating access through an adjacent property because the party wall leaves no side setback to work from. Allowances written into the contract cover exactly that kind of find, so the price you approved is the price you pay.
We Also Serve Cities Near San Francisco
We also work with homeowners just outside the city, including Mountain View, Fremont, Sunnyvale, and Santa Clara. If you’re in San Francisco or anywhere along the Peninsula and South Bay, our roof repair service is available for inspection, targeted repair, or full replacement. Call (855) 473-8840 for a free estimate.
Serving San Francisco, CA – Our Local Coverage Area
We serve San Francisco and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs About Roof Repair in San Francisco
Because the decay is underneath. In the Sunset and Richmond fog belt, constant damp keeps original cedar shingles wet, and they rot from the underside out while the top course still looks intact. A repair that only addresses the visible surface tends to fail again within a season, so the shingles need to be lifted and the decking checked beneath. Call (855) 473-8840 for an inspection – estimates are free.
Yes, often significantly. Victorian and Edwardian row houses share party walls with no side setback, so repair work frequently requires access through an adjacent building and compliance with SFFD and DBI rules on firewall continuity. That coordination is part of the job and part of the estimate, and it’s why we assess party-wall access during the inspection rather than after work begins. Call (855) 473-8840 to schedule that inspection.
It covers the work we’ve verified plus written allowances for what we can’t see until the assembly is open. Underside shingle rot, failed underlayment, and damaged framing are the usual finds, and each one is priced and approved in writing before we touch it. The written estimate sets the final price, and any change to it happens with your approval. Call (855) 473-8840 for a free line-item estimate.
Compare what’s under the surface layer, not the headline number. A bid that quotes a repair without opening the assembly is guessing, and a lower number usually means decking replacement and flashing rebuild aren’t included. Ask each roofer whether the quote covers party-wall access, permit-triggered code upgrades, and replacement of decayed wood. Call (855) 473-8840 and we’ll walk you through what a complete quote should list.
The marine layer. Fog keeps roofs damp for long stretches on the west side, moss grows between shingle courses, and the moss holds moisture against the wood, accelerating rot from the underside. Left alone, it lifts shingle edges and lets the rainy season in. Clearing moss and addressing the rot beneath it is a repair, not a cleaning job. Call (855) 473-8840 for a free estimate.
Call Sunstone Roof Repair for Your San Francisco Roof
Whether you’re in the Sunset, the Richmond, or anywhere else in San Francisco, the next step is a straight answer about what your roof actually needs. We’ll inspect first, quote line by line, and tell you if a repair will do the job. Call (855) 473-8840 for a free estimate. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. From the first inspection to the final nail, one crew, one point of contact.
Written by the team at Sunstone Roof Repair.